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Fail2ban - send Slack notifications
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... | |
action_with_slack_notification = %(banaction)s[name=%(__name__)s, bantime="%(bantime)s", port="%(port)s", protocol="%(protocol)s", chain="%(chain)s"] | |
slack[name=%(__name__)s] | |
action = %(action_with_slack_notification)s | |
... |
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[Definition] | |
actioncheck = | |
actionstart = /bin/bash /etc/fail2ban/slack_notify.sh "The jail <name> has been started successfully." > /dev/null 2>&1 | |
actionstop = /bin/bash /etc/fail2ban/slack_notify.sh "The jail <name> has been stopped." > /dev/null 2>&1 | |
actionban = /bin/bash /etc/fail2ban/slack_notify.sh "Banned _country_ <ip> in the jail <name> after <failures> attempts" "<ip>" > /dev/null 2>&1 | |
actionunban = /bin/bash /etc/fail2ban/slack_notify.sh "Unbanned _country_ <ip> in the jail <name>" "<ip>" > /dev/null 2>&1 | |
# Default name of the chain | |
# | |
name = default |
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#!/bin/bash | |
# message first command argument | |
MESSAGE=$1 | |
HOOK_URL=https://hooks.slack.com/services/<your hook url> | |
HOST=$(hostname) | |
CHANNEL="#alerts" | |
USERNAME="fail2ban" | |
ICON=":cop:" | |
# ip second command argument | |
IP=$2 | |
# lets find out from what country we have our hacker | |
COUNTRY=$(curl ipinfo.io/${IP}/country) | |
# converting country to lover case. I love you bash script =\ | |
COUNTRY=$(echo "$COUNTRY" | tr -s '[:upper:]' '[:lower:]') | |
# slack emoji | |
COUNTRY=":flag-$COUNTRY:" | |
# replace _country_ template to the country emoji | |
MESSAGE="${MESSAGE/_country_/$COUNTRY}" | |
curl -X POST --data-urlencode "payload={\"channel\": \"${CHANNEL}\", \"username\": \"${USERNAME}\", \"text\": \"[${HOST}] ${MESSAGE}\", \"icon_emoji\": \"${ICON}\"}" ${HOOK_URL} | |
exit 0 |
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