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Send Telegram noification after SSH connection
#!/bin/bash
# Edit /etc/pam.d/sshd and put the following line:
# session optional pam_exec.so /root/telegram.sh
USERID="<USER ID>"
KEY="<KEY>"
TIMEOUT="10"
URL="https://api.telegram.org/bot$KEY/sendMessage"
DATE_EXEC="$(date "+%d %b %Y %H:%M")" #Collect date & time.
TMPFILE='$(mktemp)' #Create a temporary file to keep data in.
if [[ "$PAM_TYPE" = "open_session" ]]; then
IP=$(echo $SSH_CLIENT | awk '{print $1}') #Get Client IP address.
PORT=$(echo $SSH_CLIENT | awk '{print $3}') #Get SSH port
HOSTNAME=$(hostname -f) #Get hostname
IPADDR=$(hostname -I | awk '{print $1}')
curl https://ipinfo.io/$IP -s -o $TMPFILE #Get info on client IP.
CITY=$(cat $TMPFILE | sed -n 's/^ "city":[[:space:]]*//p' | sed 's/"//g') #C lient IP info parsing
REGION=$(cat $TMPFILE | sed -n 's/^ "region":[[:space:]]*//p' | sed 's/"//g' )
COUNTRY=$(cat $TMPFILE | sed -n 's/^ "country":[[:space:]]*//p' | sed 's/"// g')
ORG=$(cat $TMPFILE | sed -n 's/^ "org":[[:space:]]*//p' | sed 's/"//g')
TEXT="$DATE_EXEC: ${USER} logged in to $HOSTNAME ($IPADDR) from $IP - $ORG - $CITY, $REGION, $COUNTRY port $PORT"
curl -s --max-time $TIMEOUT -d "chat_id=$USERID&disable_web_page_preview=1&te xt=$TEXT" $URL > /dev/null
rm $TMPFILE #clean up after
fi
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