Obsidian/05.02 Networks/GitHub - deividgdtfail2ban_telegram_notifications Sending fail2ban notifications using a Telegram bot.md

---

Alias: ["fail2ban Telegram bot"]
Tag: ["", ""]
Date: 2022-03-13
DocType: "WebClipping"
Hierarchy:
TimeStamp: 2022-03-13
Link: https://github.com/deividgdt/fail2ban_telegram_notifications
location:
CollapseMetaTable: Yes

---

Parent:: [[Selfhosting]], [[VPS Console Dialogue|VPS command-line]]

---

 

```button
name Save
type command
action Save current file
id Save
```
^button-fail2bantelegramnotificationsNSave

 

# GitHub - deividgdt/fail2ban_telegram_notifications: Sending fail2ban notifications using a Telegram bot

 

## Fail2ban Telegram Notifications

[![](https://camo.githubusercontent.com/aa776779f2a389bb73b23dda7927b688b14255ade756ecaeaa20de09368e0847/68747470733a2f2f64656976696473646f63732e66696c65732e776f726470726573732e636f6d2f323032302f30342f74656c656772616d5f6e6f74696669636174696f6e735f6661696c3262616e2e6a7067)](https://camo.githubusercontent.com/aa776779f2a389bb73b23dda7927b688b14255ade756ecaeaa20de09368e0847/68747470733a2f2f64656976696473646f63732e66696c65732e776f726470726573732e636f6d2f323032302f30342f74656c656772616d5f6e6f74696669636174696f6e735f6661696c3262616e2e6a7067)

Sending **fail2ban** notifications using a **Telegram** bot

 

---

 

## Installation and configuration

 

-   Add the following two lines, for example, to **SSHD** in the file **/etc/fail2ban/jail.conf**, make sure to tab the word **telegram**.
    
```ad-code
~~~bash
action  = iptables[name=SSH, port=22, protocol=tcp]
    		telegram
~~~
```


Example:
    
[![](https://camo.githubusercontent.com/52340dc87fba895005263001d90b5334fb6d4e0b198b7cea36514a7ae4c18183/68747470733a2f2f64656976696473646f63732e66696c65732e776f726470726573732e636f6d2f323032302f30342f6661696c3262616e2d737368642d636f6e662e706e67)](https://camo.githubusercontent.com/52340dc87fba895005263001d90b5334fb6d4e0b198b7cea36514a7ae4c18183/68747470733a2f2f64656976696473646f63732e66696c65732e776f726470726573732e636f6d2f323032302f30342f6661696c3262616e2d737368642d636f6e662e706e67)
    
-   Download the file **telegram.conf** and move it to **/etc/fail2ban/action.d/**
    
-   Download the file **send_telegram_notif.sh** move it to **/etc/fail2ban/scripts/**
    
-   Modify the file **/etc/fail2ban/scripts/send_telegram_notif.sh** and add your **Token** and your **Chat ID**:
    
```ad-code
~~~bash
telegramBotToken=YOUR_BOT_TOKEN
telegramChatID=YOUR_CHAT_ID
~~~
```
    
-   Make the file executable
    
```ad-command
~~~bash
chmod +x /etc/fail2ban/scripts/send\_telegram\_notif.sh
~~~
```
    
-   Restart the fail2ban service and enjoy!
    
```ad-command
~~~bash
systemctl restart fail2ban
~~~
```

 

---

 

## Usage

 

-   /etc/fail2ban/scripts/send\_telegram\_notif.sh -a \[ start || stop \] || \[ -n $NAME -b $IP || -n $NAME -u $IP \]"
    -   \-a (action)
    -   \-n (jail name)
    -   \-b (ban)
    -   \-u (unban)

 

---

 

## telegram.conf

 

```ad-code
~~~bash
[Definition]

actionstart = /etc/fail2ban/scripts/send_telegram_notif.sh -a start

actionstop = /etc/fail2ban/scripts/send_telegram_notif.sh -a stop

actioncheck =

actionban = /etc/fail2ban/scripts/send_telegram_notif.sh -n <name> -b <ip>

actionunban = /etc/fail2ban/scripts/send_telegram_notif.sh -n <name> -u <ip>

[Init]

init = 123
~~~
```

&emsp;

---

&emsp;

## send_telegram_notif.sh

&emsp;

```ad-code
~~~python
#!/bin/bash

# Version 1.0

# Send Fail2ban notifications using a Telegram Bot

# Add to the /etc/fail2ban/jail.conf:

# [sshd]

# ***

# action = iptables[name=SSH, port=22, protocol=tcp]

# telegram

# Create a new file in /etc/fail2ban/action.d with the following information:

# [Definition]

# actionstart = /etc/fail2ban/scripts/send_telegram_notif.sh -a start

# actionstop = /etc/fail2ban/scripts/send_telegram_notif.sh -a stop

# actioncheck =

# actionban = /etc/fail2ban/scripts/send_telegram_notif.sh -n <name> -b <ip>

# actionunban = /etc/fail2ban/scripts/send_telegram_notif.sh -n <name> -u <ip>

#

# [Init]

# init = 123

# Telegram BOT Token

telegramBotToken='YOUR_BOT_TOKEN'

# Telegram Chat ID

telegramChatID='YOUR_CHAT_ID'

function talkToBot() {

message=$1

curl -s -X POST https://api.telegram.org/bot${telegramBotToken}/sendMessage -d text="${message}" -d chat_id=${telegramChatID} > /dev/null 2>&1

}

if [ $# -eq 0 ]; then

echo "Usage $0 -a ( start || stop ) || -b \$IP || -u \$IP"

exit 1;

fi

while getopts "a:n:b:u:" opt; do

case "$opt" in

a)

action=$OPTARG

;;

n)

jail_name=$OPTARG

;;

b)

ban=y

ip_add_ban=$OPTARG

;;

u)

unban=y

ip_add_unban=$OPTARG

;;

\?)

echo "Invalid option. -$OPTARG"

exit 1

;;

esac

done

if [[ ! -z ${action} ]]; then

case "${action}" in

start)

talkToBot "Fail2ban has been started"

;;

stop)

talkToBot "Fail2ban has been stopped"

;;

*)

echo "Incorrect option"

exit 1;

;;

esac

elif [[ ${ban} == "y" ]]; then

talkToBot "[${jail_name}] The IP: ${ip_add_ban} has been banned"

exit 0;

elif [[ ${unban} == "y" ]]; then

talkToBot "[${jail_name}] The IP: ${ip_add_unban} has been unbanned"

exit 0;

else

info

fi
~~~
```

&emsp;

---

&emsp;

## Buy me a coffe

[![ko-fi](https://camo.githubusercontent.com/88b9e664b2a500cbdc892ab041e3fd1d7c348082650f3e5cf38da8ce3865e922/68747470733a2f2f7777772e6b6f2d66692e636f6d2f696d672f676974687562627574746f6e5f736d2e737667)](https://ko-fi.com/U7U01LTQB)