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No commits in common. "master" and "v1.0.0" have entirely different histories.
4 changed files with 307 additions and 693 deletions
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@ -1,5 +0,0 @@
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root = true
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[*.sh]
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indent_size = 4
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indent_style = tab
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@ -1,30 +0,0 @@
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# Example configuration file for ddos-mitigator.sh.
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# PLEASE TAKE CARE not to put any whitespace around the '=' signs, as this file is directly sourced by the script
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# file and this needs to conform to the BASH syntax. Also, make sure to declare the COUNTRIES variable with the
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# correct array syntax: COUNTRIES=("AA" "BB" "CC"), or to comment it out altogether.
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# The path to the GeoIP2 database file (must be either country or city database). This parameter is mandatory. If it is
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# not specified here, it must be given on the command line (through the -d option).
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DATABASE_FILE="/path/to/geoip/country-or-city-database.mmdb"
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# Enable the autopilot for automatically banning IP addresses of the desired countries (see also COUNTRIES option).
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# Only ban IP addresses with at least AUTOPILOT current connections. If the value is not specified or 0, don't
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# automatically ban IP addresses, but run in interactive mode.
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AUTOPILOT="0"
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# Defines the subnet size in bytes to be analyzed. Valid values are:
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# - 8 for class A networks (X.0.0.0/8)
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# - 16 for class B networks (X.X.0.0/16)
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# - 24 for class C networks (X.X.X.0/24)
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# - 32 for class D networks (X.X.X.X/32)
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# If not specified, run in interactive mode and prompt for the netmask size.
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NETMASK="8"
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# The country-codes to block as an array. Defaults to "CN" (China).
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#COUNTRIES=("CN" "HK" "TW")
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# Specify the JAIL to use for banning the IP addresses. Defaults to 'apache-auth'.
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#JAIL="apache-auth"
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# The desired port to monitor. Defaults to 443 (https).
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#PORT="443"
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@ -3,172 +3,93 @@
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# #
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# Try and prevent apache overloads by banning IP addresses that have (too) #
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# many open connections. #
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# This script uses ss to determine the connections to a configurable port #
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# on the host machine and provides automated GeoIP information retrieval based #
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# the address or the /24-, /16- or /8-subnet thereof. A GeoIP city- or country #
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# database must be installed separately and is provided to the script via a #
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# command line parameter. #
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# Addresses (or subnets) are presented to the user in order of descending #
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# connection count. For each address (or subnet), the user can choose to ban #
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# or ignore it. Addresses (or subnets) chosen to be banned will be blocked by #
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# a configurable jail of fail2ban. #
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# This script uses netstat to determine the connections to the HTTPS port of #
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# the host machine and provides automated whois information retrieval based on #
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# the address or the /24- /16- or /8-subnet thereof. Addresses (or subnets) #
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# are presented to the user in order of descending connection count. For each #
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# address (or subnet), the user can choose to ban or ignore it. Addresses (or #
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# subnets) chosen to be banned will be blocked by the apache-badbots jail of #
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# fail2ban. #
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# Author: Manuel Friedli, <manuel@fritteli.ch> #
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# This script is licenced under the GNU General Public Licence, version 3 or #
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# later. #
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# #
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################################################################################
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################################################################################
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# #
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# Prerequisites: #
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# - app-admin/sudo (`sudo`) #
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# - dev-lang/python:3.8 (`python`) #
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# - net-analyzer/fail2ban (`fail2ban-client`) #
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# - sys-apps/coreutils (`cut`, `id`, `sort`, `touch`, `tr`, `uniq`) #
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# - sys-apps/grep (`grep`) #
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# - sys-apps/iproute2 (`ss`) #
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# - sys-apps/moreutils (`sponge`) #
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# - sys-apps/util-linux (`getopt`) #
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# #
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################################################################################
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# Set the host's own IP address. So far, only an IPv4 address is supported.
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MY_IP="94.199.214.20"
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# Set the desired port to monitor.
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MY_PORT="443"
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# Store the start time; this enables us to output the total runtime at the end.
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start="$(date +%s)"
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# Dependencies of this script. Simple array with the following structure:
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# (command package [...])
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dependencies=(
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"sudo" "app-admin/sudo"
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"python" "dev-lang/python:3.8"
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"fail2ban-client" "net-analyzer/fail2ban"
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"cut" "sys-apps/coreutils"
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"id" "sys-apps/coreutils"
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"sort" "sys-apps/coreutils"
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"touch" "sys-apps/coreutils"
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"tr" "sys-apps/coreutils"
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"uniq" "sys-apps/coreutils"
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"grep" "sys-apps/grep"
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"ss" "sys-apps/iproute2"
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"sponge" "sys-apps/moreutils"
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"getopt" "sys-apps/util-linux"
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)
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# After this point, no editing is required.
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# Define the files that will contain the addresses an subnets.
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fileraw="raw-http.txt"
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filtered="filtered-http.txt"
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file8="sorted-http-8.txt"
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file16="sorted-http-16.txt"
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file24="sorted-http-24.txt"
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file32="sorted-http-32.txt"
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# This file will contain the addresses to be banned.
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banlist="banlist.txt"
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# This file contains the output of the last invocation of whois
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whoisoutput="whois.txt"
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# These suffixes must be appended to the respective addresses and subnets.
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suffix8="/8"
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suffix16="/16"
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suffix24="/24"
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suffix32="/32"
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ext8=".0.0.0"
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ext16=".0.0"
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ext24=".0"
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ext32=""
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ext8=".0.0.0/8"
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ext16=".0.0/16"
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ext24=".0/24"
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ext32="/32"
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# Define some constants to format the output in a colorful way.
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red="$(printf '\033[38;2;255;0;43m')"
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yellow="$(printf '\033[38;2;255;204;0m')"
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green="$(printf '\033[38;2;0;179;89m')"
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blue="$(printf '\033[38;2;0;85;255m')"
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bold="$(printf '\033[1m')"
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reset="$(printf '\033[0m')"
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red="\033[38;2;255;0;43m"
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yellow="\033[38;2;255;204;0m"
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green="\033[38;2;0;179;89m"
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blue="\033[38;2;0;85;255m"
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bold="\033[1m"
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reset="\033[0m"
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# Clean up when the script exits.
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trap 'sudo -k 2>/dev/null >&2; rm -r ${tmpdir}' EXIT
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trap 'sudo -k; popd >/dev/null; rm -r ${tmpdir}' EXIT
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function is_installed() {
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which "${1}" 2>/dev/null >&2
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return $?
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}
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# Create a temp directory, chdir into it and create the (initially empty)
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# banlist file.
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tmpdir=$(mktemp -d)
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# Suppress output of dir stack.
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pushd "${tmpdir}" > /dev/null
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touch "${banlist}"
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function print_missing_dependency() {
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local command="${1}"
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local package="${2}"
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echo "${red}Command ${bold}${command}${reset}${red} not found.${reset} Please install package ${blue}${package}${reset}." >&2
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}
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function check_dependencies() {
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local arraylength=${#dependencies[@]}
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local res=
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local command=
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local package=
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# 0: true, all installed; 1: false, at least one command/package missing
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local all_installed=0
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for ((i = 0; i < ${arraylength}; i += 2)); do
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command="${dependencies[$i]}"
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package="${dependencies[$i + 1]}"
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is_installed "${command}" "${package}"
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res=$?
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if [[ ${res} -ne 0 ]]; then
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print_missing_dependency "${command}" "${package}"
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all_installed=1
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fi
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done
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return ${all_installed}
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}
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function print_help() {
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function printHelp() {
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cat <<ENDOFHELP
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Usage: $(basename $0) -d FILE [OPTION...]
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Usage: $(basename $0) [OPTION...]
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${bold}Mandatory options:${reset}
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-d, --database=FILE The path to the GeoIP2 database file (must
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be either country or city database).
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${bold}Optional options:${reset}
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-a, --auto[=LIMIT] Enable the autopilot for automatically
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banning IP addresses of the desired
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countries (see also -c option).
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When LIMIT is given, only auto-ban IP
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addresses with at least LIMIT current
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connections.
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-a, --auto[=LIMIT] Enable the autopilot for automatically banning chinese IP
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addresses (whois output must contain "source: APNIC" and
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"country: CN").
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When LIMIT is given, only auto-ban IP addresses with at
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least LIMIT current connections.
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When LIMIT is omitted, assume LIMIT=1.
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-c, --country=COUNTRY[,COUNTRY...] The country-codes to block as a list of
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comma-separated values; defaults to 'CN'
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(China).
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-j, --jail=JAIL Specify the JAIL to use for banning the IP addresses. If
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not set, uses 'apache-auth'.
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-e, --dependencies Check if all required dependencies are
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installed. If all dependencies are found,
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the program terminates with exit code 0.
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Otherwise, missing dependencies are
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printed to stderr and the program
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terminates with exit code 1.
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-f, --config-file=FILENAME Specify the full path to the configuration
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file. If omitted, all options are read
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from the command line.
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Any parameter specified on the command
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line takes precedence over configuration
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option read from the file.
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-j, --jail=JAIL Specify the JAIL to use for banning the IP
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addresses.
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Defaults to 'apache-auth'.
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-n, --netmask=SIZE SIZE defines the subnet size in bytes to
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be analyzed.
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-n, --netmask=SIZE SIZE defines the subnet size in bytes to be analyzed.
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Valid values are:
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- 1 or 8 for class A networks (X.0.0.0/8)
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- 2 or 16 for class B networks (X.X.0.0/16)
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- 3 or 24 for class C networks (X.X.X.0/24)
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- 4 or 32 for class D networks (X.X.X.X/32)
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-p, --port=PORT The desired port to monitor.
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Defaults to 443 (https).
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-h, --help Show this help message
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Mandatory or optional arguments to long options are also mandatory or optional
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for any corresponding short options.
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When invoked without optional options, the autopilot is disabled and the
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netmask SIZE is inquired interactively.
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When invoked without options, the autopilot is disabled and the netmask SIZE is
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inquired interactively.
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ENDOFHELP
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}
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function exec_as_root() {
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function execAsRoot() {
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if [[ $(id -un) == "root" ]] ; then
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"$@"
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else
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@ -176,70 +97,8 @@ function exec_as_root() {
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fi
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}
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function filter() {
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# list of current connections
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file="${1}"
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# subnet extension, e.g. ".0.0"
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ext="${2}"
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# subnet suffix, e.g. "/16"
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suffix="${3}"
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rm -f "${filtered}"
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touch "${filtered}"
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# Reject already banned addresses
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while read -r -u3 address; do
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if [[ "${banned}" != *"${address}${ext}${suffix}"* ]]; then
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echo "${address}" >>"${filtered}"
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else
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echo "IGNORING ${address}${ext}${suffix}, already banned."
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fi
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done 3<"${file}"
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mv "${filtered}" "${file}"
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}
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function set_default_values() {
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if [[ -z "${autopilot}" ]]; then
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autopilot=0
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fi
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if [[ -z "${bancountries}" ]]; then
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bancountries=("CN")
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fi
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if [[ -z "${jail}" ]]; then
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jail="apache-auth"
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fi
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if [[ -z "${netmask}" ]]; then
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netmask=0
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fi
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if [[ -z "${port}" ]]; then
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port=443
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fi
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}
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function parse_config_file() {
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source "${configfile}"
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if [[ -z "${autopilot}" ]]; then
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autopilot="${AUTOPILOT}"
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fi
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if [[ -z "${bancountries}" ]]; then
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bancountries=(${COUNTRIES[@]})
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fi
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if [[ -z "${database}" ]]; then
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database="${DATABASE_FILE}"
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fi
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if [[ -z "${jail}" ]]; then
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jail="${JAIL}"
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fi
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if [[ -z "${netmask}" ]]; then
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netmask="${NETMASK}"
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fi
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if [[ -z "${port}" ]]; then
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port="${PORT}"
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fi
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}
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function parse_command_line_args() {
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TEMP=$(getopt -o 'a::,c:,d:,e,f:,j:,n:,p:,h' -l 'auto::,country:,database:,dependencies,config-file:,jail:,netmask:,port:,help' -- "$@")
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function parseCommandline() {
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TEMP=$(getopt -o 'a::,j:,n:,h' -l 'auto::,jail:,netmask:,help' -- "$@")
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|
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if [ $? -ne 0 ] ; then
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echo 'Error parsing command line options. Terminating. Invoke with --help for help.' >&2
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|
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@ -250,64 +109,49 @@ function parse_command_line_args() {
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unset TEMP
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|
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while true ; do
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case "${1}" in
|
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case "$1" in
|
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'-a'|'--auto')
|
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case "${2}" in
|
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case "$2" in
|
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'')
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autopilot=1
|
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;;
|
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*[!0-9]*)
|
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echo "Invalid argument for parameter 'auto': '$2'. Invoke with --help for help." >&2
|
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exit 1
|
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;;
|
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*)
|
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autopilot="$2"
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;;
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esac
|
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shift
|
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;;
|
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'-c' | '--country')
|
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IFS=',' read -ra bancountries <<<"${2}"
|
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shift
|
||||
;;
|
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'-d' | '--database')
|
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database="${2}"
|
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shift
|
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;;
|
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'-e' | '--dependencies')
|
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check_dependencies
|
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exit $?
|
||||
;;
|
||||
'-f' | '--config-file')
|
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configfile="${2}"
|
||||
shift
|
||||
;;
|
||||
'-j'|'--jail')
|
||||
jail="${2}"
|
||||
jail="$2"
|
||||
shift
|
||||
;;
|
||||
'-n'|'--netmask')
|
||||
case "${2}" in
|
||||
'1')
|
||||
case "$2" in
|
||||
'1'|'8')
|
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netmask=8
|
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;;
|
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'2')
|
||||
'2'|'16')
|
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netmask=16
|
||||
;;
|
||||
'3')
|
||||
'3'|'24')
|
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netmask=24
|
||||
;;
|
||||
'4')
|
||||
'4'|'32')
|
||||
netmask=32
|
||||
;;
|
||||
*)
|
||||
netmask="${2}"
|
||||
echo "Invalid argument for parameter 'netmask': '$2'. Invoke with --help for help." >&2
|
||||
exit 1
|
||||
;;
|
||||
esac
|
||||
shift
|
||||
;;
|
||||
'-p' | '--port')
|
||||
port="${2}"
|
||||
shift
|
||||
;;
|
||||
'-h'|'--help')
|
||||
print_help
|
||||
printHelp
|
||||
exit
|
||||
;;
|
||||
'--')
|
||||
|
|
@ -315,279 +159,60 @@ function parse_command_line_args() {
|
|||
break
|
||||
;;
|
||||
*)
|
||||
echo "Unknown error on command line argument '${1}'. Terminating." >&2
|
||||
echo "Unknown error on command line argument '$1'. Terminating." >&2
|
||||
exit 1
|
||||
;;
|
||||
esac
|
||||
shift
|
||||
done
|
||||
|
||||
# If the config file option is set, parse the config file.
|
||||
if [[ ! -z ${configfile+x} ]]; then
|
||||
if [[ ! -f "${configfile}" || ! -r "${configfile}" ]]; then
|
||||
echo "Can not read configuration file '${2}'. Invoke with --help for help." >&2
|
||||
exit 1
|
||||
fi
|
||||
|
||||
parse_config_file
|
||||
fi
|
||||
|
||||
# Here, we set the default values for all options that have not been set yet.
|
||||
set_default_values
|
||||
}
|
||||
|
||||
function validate_parameter_values() {
|
||||
# GeoIP-Database
|
||||
if [[ -z "${database}" ]]; then
|
||||
echo "No GeoIP database specified. Invoke with --help for more information." >&2
|
||||
exit 1
|
||||
fi
|
||||
|
||||
if [[ ! -f "${database}" || ! -r "${database}" ]]; then
|
||||
echo "Database '${database}' is not accessible." >&2
|
||||
exit 1
|
||||
fi
|
||||
|
||||
# Autopilot
|
||||
case "${autopilot}" in
|
||||
*[!0-9]*)
|
||||
echo "Invalid value for parameter 'auto' / 'AUTOPILOT': '${autopilot}'." >&2
|
||||
echo "Invoke with --help for help." >&2
|
||||
exit 1
|
||||
;;
|
||||
esac
|
||||
|
||||
# Countries
|
||||
if [[ -z ${bancountries[@]// /} ]]; then
|
||||
echo "Invalid value for parameter 'country' / 'COUNTRIES': '${bancountries[*]}'." >&2
|
||||
echo "Invoke with --help for help." >&2
|
||||
exit 1
|
||||
fi
|
||||
|
||||
# Jail
|
||||
if [[ -z "${jail}" ]]; then
|
||||
echo "Invalid value for parameter 'jail' / 'JAIL': '${jail}'." >&2
|
||||
echo "Invoke with --help for help." >&2
|
||||
exit 1
|
||||
fi
|
||||
|
||||
# Netmask
|
||||
case "${netmask}" in
|
||||
'0' | '8' | '16' | '24' | '32')
|
||||
# Everything OK.
|
||||
;;
|
||||
*)
|
||||
echo "Invalid value for parameter 'netmask': '${2}'." >&2
|
||||
echo "Invoke with --help for help." >&2
|
||||
exit 1
|
||||
;;
|
||||
esac
|
||||
|
||||
# Port
|
||||
case "${port}" in
|
||||
*[!0-9]*)
|
||||
echo "Invalid value for parameter 'port' / 'PORT': '${autopilot}'." >&2
|
||||
echo "Invoke with --help for help." >&2
|
||||
exit 1
|
||||
;;
|
||||
esac
|
||||
if [[ ${port} -lt 0 || ${port} -gt 65535 ]]; then
|
||||
echo "Invalid value for parameter 'port' / 'PORT': '${autopilot}'." >&2
|
||||
echo "Value must be between 0 ... 65535 (inclusive)." >&2
|
||||
echo "Invoke with --help for help." >&2
|
||||
exit 1
|
||||
fi
|
||||
}
|
||||
|
||||
################################################################################
|
||||
# Set the highlighting color for the address count. The color goes from green
|
||||
# (low count) over yellow (intermediate count) to red (high count). Depending
|
||||
# on the size of the subnet (/8, /16, /24 or /32), the transitions from one
|
||||
# color to the next happen at different values.
|
||||
################################################################################
|
||||
function set_highlight_color() {
|
||||
local count=${1}
|
||||
case "${choice}" in
|
||||
"1")
|
||||
# /32: 0 <= green < 3 <= yellow < 5 <= red
|
||||
if [ ${count} -ge 5 ]; then
|
||||
hilite="${red}"
|
||||
elif [ ${count} -ge 3 ]; then
|
||||
hilite="${yellow}"
|
||||
else
|
||||
hilite="${green}"
|
||||
fi
|
||||
;;
|
||||
"2")
|
||||
# /24: 0 <= green < 7 <= yellow < 13 <= red
|
||||
if [ ${count} -ge 13 ]; then
|
||||
hilite="${red}"
|
||||
elif [ ${count} -ge 7 ]; then
|
||||
hilite="${yellow}"
|
||||
else
|
||||
hilite="${green}"
|
||||
fi
|
||||
;;
|
||||
"3")
|
||||
# /16: 0 <= green < 13 <= yellow < 25 <= red
|
||||
if [ ${count} -ge 25 ]; then
|
||||
hilite="${red}"
|
||||
elif [ ${count} -ge 13 ]; then
|
||||
hilite="${yellow}"
|
||||
else
|
||||
hilite="${green}"
|
||||
fi
|
||||
;;
|
||||
"4")
|
||||
# /8: 0 <= green < 21 <= yellow < 49 <= red
|
||||
if [ ${count} -ge 49 ]; then
|
||||
hilite="${red}"
|
||||
elif [ ${count} -ge 21 ]; then
|
||||
hilite="${yellow}"
|
||||
else
|
||||
hilite="${green}"
|
||||
fi
|
||||
;;
|
||||
*)
|
||||
# ???: We should never get here. As a fall-back, just use no
|
||||
# highlighting.
|
||||
hilite=""
|
||||
;;
|
||||
esac
|
||||
}
|
||||
|
||||
################################################################################
|
||||
# Process the file denoted by $1. For each line in the file, the count and the
|
||||
# address are displayed and a lookup for the IP addresses country is made in the
|
||||
# GeoIP database. The user can then choose to ban or ignore the address.
|
||||
# Addresses chosen to be banned are appended to the $banlist.
|
||||
################################################################################
|
||||
function process_file() {
|
||||
local file="${1}"
|
||||
local line=''
|
||||
local count=0
|
||||
local addronly=''
|
||||
local addrwithsuffix=''
|
||||
local banaction=''
|
||||
local nline=1
|
||||
local country=
|
||||
# Read the contents from filedescriptor 3 (important: Don's use the
|
||||
# standard filedescriptor because we need to handle user input from
|
||||
# within the loop).
|
||||
while IFS= read -r -u3 line; do
|
||||
line="$(echo "${line}" | tr -s '[:blank:]')"
|
||||
count="$(echo "${line}" | cut -d' ' -f2)"
|
||||
addronly="$(echo "${line}" | cut -d' ' -f3-)${ext}"
|
||||
addrwithsuffix="${addronly}${suffix}"
|
||||
set_highlight_color "${count}"
|
||||
country="$("${curdir}/geoip-lookup.py" -f "${database}" "${addronly}")"
|
||||
if [[ ${autopilot} -eq 0 ]]; then
|
||||
echo "Country: '${yellow}${country}${reset}'"
|
||||
fi
|
||||
echo -n "Address ${bold}$((nline++)) of ${nlines}${reset}: \
|
||||
Found '${blue}${addrwithsuffix}${reset}' ${hilite}${count}${reset} times."
|
||||
|
||||
if [[ ${autopilot} -eq 0 ]]; then
|
||||
echo -n " Ban [y/N/s=No, and skip remaining]? "
|
||||
read banaction
|
||||
else
|
||||
if [[ " ${bancountries[@]} " =~ " ${country} " ]]; then
|
||||
if [[ ${count} -ge ${autopilot} ]]; then
|
||||
echo -en "\n${red}Autopilot active. ${reset}"
|
||||
banaction=y
|
||||
else
|
||||
echo -e "\n${yellow}Autopilot active. Ignoring remaining addresses due to limit of ${autopilot}.${reset}"
|
||||
return
|
||||
fi
|
||||
else
|
||||
if [[ ${count} -ge ${autopilot} ]]; then
|
||||
echo -en "\n${green}Autopilot active. ${reset}"
|
||||
banaction=n
|
||||
else
|
||||
echo -e "\n${green}Autopilot active.${reset} ${yellow}Ignoring remaining addresses due to limit of ${autopilot}.${reset}"
|
||||
return
|
||||
fi
|
||||
fi
|
||||
fi
|
||||
|
||||
case "${banaction}" in
|
||||
"s" | "S")
|
||||
echo "Not banning '${blue}${addrwithsuffix}${reset}', \
|
||||
skipping remaining addresses."
|
||||
return
|
||||
;;
|
||||
"y" | "Y")
|
||||
echo "Adding '${blue}${addrwithsuffix}${reset}' to \
|
||||
banlist (country=${yellow}${country}${reset})."
|
||||
echo "${addrwithsuffix}" >>"${banlist}"
|
||||
;;
|
||||
"n" | "N" | *)
|
||||
echo "Not banning '${blue}${addrwithsuffix}${reset}' (country=${yellow}${country}${reset})."
|
||||
;;
|
||||
esac
|
||||
# Here goes: Pipe the file contents via filedescriptor 3.
|
||||
done 3<"${file}"
|
||||
echo "Processed all entries in ${file}."
|
||||
}
|
||||
|
||||
# Create a temp directory, chdir into it and create the (initially empty)
|
||||
# banlist file.
|
||||
tmpdir="$(mktemp -d)"
|
||||
|
||||
# Set up all file paths
|
||||
curdir="$(dirname "$0")"
|
||||
# Define the files that will contain the addresses an subnets.
|
||||
fileraw="${tmpdir}/raw-http.txt"
|
||||
filtered="${tmpdir}/filtered-http.txt"
|
||||
file8="${tmpdir}/sorted-http-8.txt"
|
||||
file16="${tmpdir}/sorted-http-16.txt"
|
||||
file24="${tmpdir}/sorted-http-24.txt"
|
||||
file32="${tmpdir}/sorted-http-32.txt"
|
||||
# This file will contain the addresses to be banned.
|
||||
banlist="${tmpdir}/banlist.txt"
|
||||
|
||||
touch "${banlist}"
|
||||
|
||||
# Parse the command line options
|
||||
autopilot=
|
||||
netmask=
|
||||
jail=
|
||||
bancountries=
|
||||
database=
|
||||
port=
|
||||
autopilot=0
|
||||
netmask=0
|
||||
jail="apache-auth"
|
||||
|
||||
parse_command_line_args "$@"
|
||||
validate_parameter_values
|
||||
|
||||
check_dependencies
|
||||
dependencies_ok=$?
|
||||
if [[ ${dependencies_ok} -ne 0 ]]; then
|
||||
exit ${dependencies_ok}
|
||||
fi
|
||||
parseCommandline "$@"
|
||||
|
||||
# List already banned addresses in the chosen jail
|
||||
banned="$(exec_as_root fail2ban-client get "${jail}" banip)"
|
||||
banned="$(execAsRoot fail2ban-client get "${jail}" banip)"
|
||||
|
||||
# Determine the current connections to the desired port; store the raw data in
|
||||
# $fileraw.
|
||||
connections=$(ss -HOn state established "( sport = :${port} )" | tr -s '[:blank:]' | cut -d' ' -f5)
|
||||
|
||||
# IPv6-mapped-IPv4: [::ffff:192.168.0.1]:443
|
||||
echo "${connections}" | grep '^\[::ffff:' - | cut -d: -f4 | cut -d] -f1 | grep -v '^$' >"${fileraw}"
|
||||
# Pure IPv4: 192.168.0.1:443
|
||||
echo "${connections}" | grep -v '^\[' - | cut -d: -f1 | grep -v '^$' >>"${fileraw}"
|
||||
netstat -nt | grep "${MY_IP}:${MY_PORT}" | tr -s '[:blank:]' | cut -d' ' -f5 \
|
||||
| cut -d: -f1 | sort > "${fileraw}"
|
||||
|
||||
# Group and sort the data into the subnet-specific files.
|
||||
sort "${fileraw}" >"${file32}"
|
||||
cp "${fileraw}" "${file32}"
|
||||
cut -d. -f1-3 "${fileraw}" | sort > "${file24}"
|
||||
cut -d. -f1-2 "${fileraw}" | sort > "${file16}"
|
||||
cut -d. -f1 "${fileraw}" | sort > "${file8}"
|
||||
|
||||
function filter() {
|
||||
# list of current connections
|
||||
file="$1"
|
||||
# subnet extension, e.g. ".0.0/16"
|
||||
ext="$2"
|
||||
rm -f "${filtered}"
|
||||
|
||||
# Reject already banned addresses
|
||||
while read -r -u3 address ; do
|
||||
if [[ "${banned}" != *"${address}${ext}"* ]] ; then
|
||||
echo "Considering ${address}."
|
||||
echo "${address}" >> "${filtered}"
|
||||
else
|
||||
echo "IGNORING ${address}, already banned."
|
||||
fi
|
||||
done 3< "${file}"
|
||||
|
||||
mv "${filtered}" "${file}"
|
||||
}
|
||||
|
||||
# Filter already banned addresses
|
||||
filter "${file32}" "${ext32}" "${suffix32}"
|
||||
filter "${file24}" "${ext24}" "${suffix24}"
|
||||
filter "${file16}" "${ext16}" "${suffix16}"
|
||||
filter "${file8}" "${ext8}" "${suffix8}"
|
||||
filter "${file32}" "${ext32}"
|
||||
filter "${file24}" "${ext24}"
|
||||
filter "${file16}" "${ext16}"
|
||||
filter "${file8}" "${ext8}"
|
||||
|
||||
# Determine the number of connections per address
|
||||
uniq -c "${file32}" | sort -rn | sponge "${file32}"
|
||||
|
|
@ -642,16 +267,149 @@ TEMP="file${netmask}"
|
|||
file="${!TEMP}"
|
||||
TEMP="ext${netmask}"
|
||||
ext="${!TEMP}"
|
||||
TEMP="suffix${netmask}"
|
||||
suffix="${!TEMP}"
|
||||
TEMP="nlines${netmask}"
|
||||
nlines="${!TEMP}"
|
||||
unset TEMP
|
||||
|
||||
echo "Processing ${file}."
|
||||
|
||||
################################################################################
|
||||
# Set the highlighting color for the address count. The color goes from green
|
||||
# (low count) over yellow (intermediate count) to red (high count). Depending
|
||||
# on the size of the subnet (/8, /16, /24 or /32), the transitions from one
|
||||
# color to the next happen at different values.
|
||||
################################################################################
|
||||
function setHilite() {
|
||||
local count=$1
|
||||
case "${choice}" in
|
||||
"1" )
|
||||
# /32: 0 <= green < 3 <= yellow < 5 <= red
|
||||
if [ $count -ge 5 ] ; then
|
||||
hilite="${red}"
|
||||
elif [ $count -ge 3 ] ; then
|
||||
hilite="${yellow}"
|
||||
else
|
||||
hilite="${green}"
|
||||
fi
|
||||
;;
|
||||
"2" )
|
||||
# /24: 0 <= green < 7 <= yellow < 13 <= red
|
||||
if [ $count -ge 13 ] ; then
|
||||
hilite="${red}"
|
||||
elif [ $count -ge 7 ] ; then
|
||||
hilite="${yellow}"
|
||||
else
|
||||
hilite="${green}"
|
||||
fi
|
||||
;;
|
||||
"3" )
|
||||
# /16: 0 <= green < 13 <= yellow < 25 <= red
|
||||
if [ $count -ge 25 ] ; then
|
||||
hilite="${red}"
|
||||
elif [ $count -ge 13 ] ; then
|
||||
hilite="${yellow}"
|
||||
else
|
||||
hilite="${green}"
|
||||
fi
|
||||
;;
|
||||
"4" )
|
||||
# /8: 0 <= green < 21 <= yellow < 49 <= red
|
||||
if [ $count -ge 49 ] ; then
|
||||
hilite="${red}"
|
||||
elif [ $count -ge 21 ] ; then
|
||||
hilite="${yellow}"
|
||||
else
|
||||
hilite="${green}"
|
||||
fi
|
||||
;;
|
||||
* )
|
||||
# ???: We should never get here. As a fall-back, just use no
|
||||
# highlighting.
|
||||
hilite=""
|
||||
;;
|
||||
esac
|
||||
}
|
||||
|
||||
################################################################################
|
||||
# Process the file denoted by $1. For each line in the file, the count and the
|
||||
# address are displayed and a whois request is made. The user can then choose to
|
||||
# ban or ignore the address. Addresses chosen to be banned are appended to the
|
||||
# $banlist.
|
||||
################################################################################
|
||||
function processFile () {
|
||||
local file="${1}"
|
||||
local line=''
|
||||
local count=0
|
||||
local addr=''
|
||||
local banaction=''
|
||||
local nline=1
|
||||
local country_cn=1
|
||||
local source_apnic=1
|
||||
# Read the contents from filedescriptor 3 (important: Don's use the
|
||||
# standard filedescriptor because we need to handle user input from
|
||||
# within the loop).
|
||||
while IFS= read -r -u3 line ; do
|
||||
line="$(echo "${line}" | tr -s '[:blank:]')"
|
||||
count="$(echo "${line}" | cut -d' ' -f2)"
|
||||
addr="$(echo "${line}" | cut -d' ' -f3-)${ext}"
|
||||
setHilite "${count}"
|
||||
if [[ autopilot -eq 0 ]] ; then
|
||||
whois "${addr}" | tee "${whoisoutput}"
|
||||
else
|
||||
whois "${addr}" > "${whoisoutput}"
|
||||
fi
|
||||
grep -iq "^country: *cn$" "${whoisoutput}"
|
||||
country_cn=$?
|
||||
grep -iq "^source: *apnic$" "${whoisoutput}"
|
||||
source_apnic=$?
|
||||
echo -en "Address ${bold}$((nline++)) of ${nlines}${reset}: \
|
||||
Found '${blue}${addr}${reset}' ${hilite}${count}${reset} times."
|
||||
|
||||
if [[ ${autopilot} -eq 0 ]] ; then
|
||||
echo -en "Ban [y/N/s=No, and skip remaining]? "
|
||||
read banaction
|
||||
else
|
||||
if [[ ${country_cn} -eq 0 && ${source_apnic} -eq 0 ]] ; then
|
||||
if [[ $count -ge $autopilot ]] ; then
|
||||
echo -en "\n${red}Autopilot active. ${reset}"
|
||||
banaction=y
|
||||
else
|
||||
echo -e "\n${yellow}Autopilot active. Ignoring remaining addresses due to limit of ${autopilot}.${reset}"
|
||||
return
|
||||
fi
|
||||
else
|
||||
if [[ $count -ge $autopilot ]] ; then
|
||||
echo -en "\n${green}Autopilot active. ${reset}"
|
||||
banaction=n
|
||||
else
|
||||
echo -e "\n${green}Autopilot active.${reset} ${yellow}Ignoring remaining addresses due to limit of ${autopilot}.${reset}"
|
||||
return
|
||||
fi
|
||||
fi
|
||||
fi
|
||||
|
||||
case "${banaction}" in
|
||||
"s" | "S" )
|
||||
echo -e "Not banning '${blue}${addr}${reset}', \
|
||||
skipping remaining addresses."
|
||||
return
|
||||
;;
|
||||
"y" | "Y" )
|
||||
echo -e "Adding '${blue}${addr}${reset}' to \
|
||||
banlist."
|
||||
echo "${addr}" >> "${banlist}"
|
||||
;;
|
||||
"n" | "N" | * )
|
||||
echo -e "Not banning '${blue}${addr}${reset}'."
|
||||
;;
|
||||
esac
|
||||
# Here goes: Pipe the file contents via filedescriptor 3.
|
||||
done 3< "${file}"
|
||||
echo "Processed all entries in ${file}."
|
||||
}
|
||||
|
||||
# Invoke the processing function on the chosen file.
|
||||
process_file "${file}"
|
||||
processFile "${file}"
|
||||
|
||||
echo "These are the addresses to be banned:"
|
||||
cat "${banlist}"
|
||||
|
|
@ -662,11 +420,9 @@ sudo -k
|
|||
|
||||
# Iterate over all addresses in $banlist and invoke fail2ban-client on each
|
||||
# one of them.
|
||||
while read -r addrwithsuffix; do
|
||||
echo "Banning ${addrwithsuffix} ..."
|
||||
exec_as_root fail2ban-client set "${jail}" banip "${addrwithsuffix}"
|
||||
while read -r addr ; do
|
||||
echo "Banning ${addr} ..."
|
||||
execAsRoot fail2ban-client set "${jail}" banip "${addr}"
|
||||
done < "${banlist}"
|
||||
|
||||
end="$(date +%s)"
|
||||
|
||||
echo "${green}All done in $((end - start)) seconds!${reset}"
|
||||
echo -e "${green}All done!${reset}"
|
||||
|
|
|
|||
107
geoip-lookup.py
107
geoip-lookup.py
|
|
@ -1,107 +0,0 @@
|
|||
#!/usr/bin/python
|
||||
|
||||
import argparse
|
||||
import sys
|
||||
|
||||
try:
|
||||
import geoip2.database
|
||||
import geoip2.errors
|
||||
except ImportError:
|
||||
print(
|
||||
"Required modules geoip2.database and geoip2.errors not found. On Gentoo Linux, please install dev-python/geoip2 from the 'fritteli' overlay.",
|
||||
file=sys.stderr)
|
||||
exit(1)
|
||||
|
||||
try:
|
||||
import maxminddb.errors
|
||||
except ImportError:
|
||||
print(
|
||||
"Required module maxminddb.errors not found. On Gentoo Linux, please install dev-python/maxminddb from the 'fritteli' overlay.",
|
||||
file=sys.stderr)
|
||||
exit(1)
|
||||
|
||||
class LookupException(Exception):
|
||||
"""
|
||||
General Exception class that is raised if anything goes wrong.
|
||||
"""
|
||||
pass
|
||||
|
||||
|
||||
def get_county_code(ipaddress, dbfile):
|
||||
"""
|
||||
Determine the country code that the given ipaddress comes from.
|
||||
:param ipaddress: The IP address to look up
|
||||
:param dbfile: The path to the GeoIP2/GeoLite2 database file (Country or City database)
|
||||
:return: The ISO country code (2 letters)
|
||||
"""
|
||||
if not ipaddress:
|
||||
raise LookupException("No address given")
|
||||
if not dbfile:
|
||||
raise LookupException("No db file given")
|
||||
|
||||
reader = None
|
||||
try:
|
||||
reader = geoip2.database.Reader(dbfile)
|
||||
dbtype = reader.metadata().database_type
|
||||
country = None
|
||||
if dbtype == 'GeoLite2-City' or dbtype == 'GeoIP2-City':
|
||||
country = reader.city(ipaddress).country
|
||||
elif dbfile == 'GeoLite2-Country' or dbtype == 'GeoIP2-Country':
|
||||
country = reader.country(ipaddress).country
|
||||
# ASN is not supported
|
||||
# elif dbfile == 'GeoLite2-ASN' or dbtype == 'GeoIP2-ASN':
|
||||
|
||||
if not country:
|
||||
raise LookupException("Unsupported DB type: " + dbtype)
|
||||
|
||||
return country.iso_code
|
||||
except FileNotFoundError as e:
|
||||
raise LookupException(e.args)
|
||||
except maxminddb.errors.InvalidDatabaseError as e:
|
||||
raise LookupException(e.args)
|
||||
except geoip2.errors.AddressNotFoundError as e:
|
||||
raise LookupException(e.args)
|
||||
except ValueError as e:
|
||||
raise LookupException(e.args)
|
||||
finally:
|
||||
if reader:
|
||||
reader.close()
|
||||
|
||||
|
||||
def parse_command_line(argv):
|
||||
"""
|
||||
Parse the command line. First, the database file must be specified ("-f /path/to/db/file.mmdb"), then the IP address
|
||||
to look up
|
||||
:param argv:
|
||||
:return:
|
||||
"""
|
||||
dbfile = None
|
||||
parser = argparse.ArgumentParser(description='Get the country code from an IP address')
|
||||
parser.add_argument('-f', dest='dbfile', required=True, help="Path to the GeoIP2 database file")
|
||||
parser.add_argument('address', help="The IP address to check")
|
||||
args = parser.parse_args()
|
||||
|
||||
return args.dbfile, args.address
|
||||
|
||||
def main(argv):
|
||||
"""
|
||||
Read the database file and the IP address from the command line and print the corresponding ISO country code on
|
||||
stdout.
|
||||
:param argv: Format: "-f /path/to/database.mmdb ip.v4.add.ress"
|
||||
:return:
|
||||
"""
|
||||
try:
|
||||
(dbfile, ipaddress) = parse_command_line(argv)
|
||||
code = get_county_code(ipaddress, dbfile)
|
||||
print(code)
|
||||
except LookupException as e:
|
||||
print(e.args, file=sys.stderr)
|
||||
print("Unknown")
|
||||
|
||||
|
||||
if __name__ == '__main__':
|
||||
try:
|
||||
main(sys.argv[1:])
|
||||
except BaseException as e:
|
||||
print("Unknown")
|
||||
raise e
|
||||
Loading…
Reference in a new issue