Fail2ban + Telegram using telegram-send

how-to-install-telegram-send

# lsb_release -a
No LSB modules are available.
Distributor ID: Debian
Description:    Debian GNU/Linux 8.9 (jessie)
Release:        8.9
Codename:       jessie

Installing telegram-send
# pip install telegram-send

Enter chat_id and token for Telegram bot:
# telegram-send --configure

Testing
# /usr/local/bin/telegram-send --format markdown Test

jail.conf

# File /etc/fail2ban/jail.conf
[ssh]
enabled  = true
port     = ssh
filter   = sshd
logpath  = /var/log/auth.log
maxretry = 6
action   = %(action_)s
           telegram[name=SSH]

telegram.conf

# File /etc/fail2ban/action.d/telegram.conf
[Definition]
actionstart = /usr/local/bin/telegram-send --format markdown "[Fail2Ban] The jail <name> has been started on `uname -n` successfully."
actionstop = /usr/local/bin/telegram-send --format markdown "[Fail2Ban] The jail <name> has been stopped on `uname -n`."
actioncheck =
actionban = /usr/local/bin/telegram-send --format markdown "[Fail2Ban] The IP <ip> has just been banned by Fail2Ban after <failures> attempts against <name> from `uname -n`"
actionunban = /usr/local/bin/telegram-send --format markdown "[Fail2Ban] The IP <ip> has just been unbanned by Fail2Ban after <failures> attempts against <name> from `uname -n`"

[Init]
init = 'Fail2Ban Telegram plugins activated"