Implement local DB queries instead of whois.
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@ -43,10 +43,14 @@ MY_PORT="443"
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# After this point, no editing is required.
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# These suffixes must be appended to the respective addresses and subnets.
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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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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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# 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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@ -119,13 +123,15 @@ function exec_as_root() {
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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. ".0.0/16"
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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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# Reject already banned addresses
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while read -r -u3 address ; do
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if [[ "${banned}" != *"${address}${ext}"* ]] ; then
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if [[ "${banned}" != *"${address}${ext}${suffix}"* ]] ; then
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echo "Considering ${address}."
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echo "${address}" >> "${filtered}"
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else
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@ -283,41 +289,40 @@ function set_highlight_color() {
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################################################################################
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# Process the file denoted by $1. For each line in the file, the count and the
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# address are displayed and a whois request is made. The user can then choose to
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# ban or ignore the address. Addresses chosen to be banned are appended to the
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# $banlist.
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# address are displayed and a lookup for the IP addresses country is made in the
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# GeoIP database. The user can then choose to ban or ignore the address.
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# Addresses chosen to be banned are appended to the $banlist.
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################################################################################
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function process_file () {
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local file="${1}"
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local line=''
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local count=0
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local addr=''
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local addronly=''
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local addrwithsuffix=''
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local banaction=''
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local nline=1
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local country_cn=1
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local country=
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# Read the contents from filedescriptor 3 (important: Don's use the
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# standard filedescriptor because we need to handle user input from
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# within the loop).
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while IFS= read -r -u3 line ; do
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line="$(echo "${line}" | tr -s '[:blank:]')"
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count="$(echo "${line}" | cut -d' ' -f2)"
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addr="$(echo "${line}" | cut -d' ' -f3-)${ext}"
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addronly="$(echo "${line}" | cut -d' ' -f3-)${ext}"
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addrwithsuffix="${addronly}${suffix}"
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set_highlight_color "${count}"
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country="$(./geoip-lookup.py -f "${database}" "${addronly}")"
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if [[ autopilot -eq 0 ]] ; then
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whois "${addr}" | tee "${whoisoutput}"
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else
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whois "${addr}" > "${whoisoutput}"
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echo "Country: '${country}'"
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fi
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grep -iq "^country: *${bancountry}$" "${whoisoutput}"
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country_cn=$?
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echo -n "Address ${bold}$((nline++)) of ${nlines}${reset}: \
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Found '${blue}${addr}${reset}' ${hilite}${count}${reset} times."
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Found '${blue}${addrwithsuffix}${reset}' ${hilite}${count}${reset} times."
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if [[ ${autopilot} -eq 0 ]] ; then
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echo -n "Ban [y/N/s=No, and skip remaining]? "
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read banaction
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else
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if [[ ${country_cn} -eq 0 ]] ; then
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if [[ "${country}" == "${bancountry}" ]] ; then
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if [[ $count -ge $autopilot ]] ; then
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echo -en "\n${red}Autopilot active. ${reset}"
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banaction=y
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@ -338,17 +343,17 @@ Found '${blue}${addr}${reset}' ${hilite}${count}${reset} times."
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case "${banaction}" in
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"s" | "S" )
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echo "Not banning '${blue}${addr}${reset}', \
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echo "Not banning '${blue}${addrwithsuffix}${reset}', \
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skipping remaining addresses."
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return
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;;
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"y" | "Y" )
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echo "Adding '${blue}${addr}${reset}' to \
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echo "Adding '${blue}${addrwithsuffix}${reset}' to \
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banlist."
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echo "${addr}" >> "${banlist}"
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echo "${addrwithsuffix}" >> "${banlist}"
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;;
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"n" | "N" | * )
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echo "Not banning '${blue}${addr}${reset}'."
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echo "Not banning '${blue}${addrwithsuffix}${reset}'."
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;;
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esac
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# Here goes: Pipe the file contents via filedescriptor 3.
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@ -414,10 +419,10 @@ cut -d. -f1-2 "${fileraw}" | sort > "${file16}"
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cut -d. -f1 "${fileraw}" | sort > "${file8}"
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# Filter already banned addresses
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filter "${file32}" "${ext32}"
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filter "${file24}" "${ext24}"
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filter "${file16}" "${ext16}"
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filter "${file8}" "${ext8}"
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filter "${file32}" "${ext32}" "${suffix32}"
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filter "${file24}" "${ext24}" "${suffix24}"
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filter "${file16}" "${ext16}" "${suffix16}"
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filter "${file8}" "${ext8}" "${suffix8}"
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# Determine the number of connections per address
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uniq -c "${file32}" | sort -rn | sponge "${file32}"
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@ -472,6 +477,8 @@ TEMP="file${netmask}"
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file="${!TEMP}"
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TEMP="ext${netmask}"
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ext="${!TEMP}"
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TEMP="suffix${netmask}"
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suffix="${!TEMP}"
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TEMP="nlines${netmask}"
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nlines="${!TEMP}"
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unset TEMP
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@ -490,9 +497,9 @@ sudo -k
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# Iterate over all addresses in $banlist and invoke fail2ban-client on each
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# one of them.
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while read -r addr ; do
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echo "Banning ${addr} ..."
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exec_as_root fail2ban-client set "${jail}" banip "${addr}"
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while read -r addrwithsuffix ; do
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echo "Banning ${addrwithsuffix} ..."
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exec_as_root fail2ban-client set "${jail}" banip "${addrwithsuffix}"
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done < "${banlist}"
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echo "${green}All done!${reset}"
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