Action on the server when connecting via ssh?

Question

linux

Good afternoon, I would like to try to make it so that when I successfully connect to the server (ssh, ftp), I receive a letter in the mail. Is it real to do? If yes, can you give me some hints or examples how to do it?

Answer 1

Try your cart bot. Notifications are an order of magnitude more convenient and faster than mail.
I will describe for debian. (for other distros it won't be much different). If not you, then maybe someone else will need everything ready:
Create a file /usr/local/bin/telegram_alert.sh with the following content:

#!/bin/bash
KEY="АПИ_КЛЮЧ:ВАШЕГО_БОТА"
URL="https://api.telegram.org/bot$KEY/sendMessage"
TARGET="айдишник_контакта_или_группы_куда_слать_уведомления"
DATE1="$(date "+%H:%M:%S")"
DATE2="$(date "+%d %B %Y")"
GEO="$(curl ipinfo.io/$PAM_RHOST)"
TEXT="*$PAM_USER* залогинился на *$HOSTNAME* 
Время: $DATE1
Дата: $DATE2
Адрес: $PAM_RHOST
Service: $PAM_SERVICE
TTY: $PAM_TTY
GEO: ${GEO}"
PAYLOAD="chat_id=$TARGET&text=$TEXT&parse_mode=Markdown&disable_web_page_preview=true"
curl -s --max-time 10 --retry 5 --retry-delay 2 --retry-max-time 10 -d "$PAYLOAD" $URL > /dev/null 2>&1 &

In the file /etc/pam.d/sshd add/edit the line:

session optional pam_exec.so type=open_session seteuid /usr/local/bin/telegram_alert.sh

You will receive in this form:

How to create your own bot is a separate issue. And it is very light, and there are a lot of instructions on the net.

Answer 2

https://medium.com/@alessandrocuda/ssh-login-alert...