alert.sh

#!/usr/bin/env bash
 
# Import credentials form config file
. /opt/ssh-login-alert-telegram/credentials.config
for i in "${USERID[@]}"
do
URL="https://api.telegram.org/bot${KEY}/sendMessage"
DATE="$(date "+%d %b %Y %H:%M")"

if [ -n "$SSH_CLIENT" ]; then
	CLIENT_IP=$(echo $SSH_CLIENT | awk '{print $1}')
	CLIENT_PORT=$(echo $SSH_CLIENT | awk '{print $2}')
	SERVER_PORT=$(echo $SSH_CLIENT | awk '{print $NF}')

	SRV_HOSTNAME=$(hostname -f)
	SRV_IP=$(hostname -I | awk '{print $1}')

	IPLOOKUP="https://extreme-ip-lookup.com/json/${CLIENT_IP}"
	MORE=$(curl -s ${IPLOOKUP})


	TEXT="
Connection from *${CLIENT_IP}*:${CLIENT_PORT} as ${USER} on *${SRV_HOSTNAME}* (*${SRV_IP}*:${SERVER_PORT})
Date: ${DATE}
More informations ([${IPLOOKUP}](${IPLOOKUP})): 
${MORE}
"

	curl -s -d "chat_id=$i&text=${TEXT}&disable_web_page_preview=true&parse_mode=markdown" $URL > /dev/null
fi
done