Sometime i wants to know who is login and when user login to my server but i don’t want to setup and run my own mail server, this can be done easily by using tcpwrapper and ssmtp , first make sure ssmtp is installed
# dpkg -l|grep ssmtp
iF ssmtp 2.64-4fakesync1 extremely simple MTA to get mail off the sys
if ssmtp is not installed yet, install it by using
# apt-get install ssmtp
If you are using Gmail account , change the root, authuser, and authpass options to the email address, username, and password of your email account. If you’re using another mail service you’ll need to change mailhub to the relevant SMTP server.
edit /etc/ssmtp/ssmtp.conf and add these lines
--------------------------------------------
root=alert@example.com
mailhub=smtp.example.com:587
rewriteDomain=
hostname=smtp.example.com:587
UseSTARTTLS=YES
UseTLS=YES
AuthUser=alert@example.com
AuthPass=password
AuthMethod=LOGIN
FromLineOverride=YES # optional
--------------------------------------------
Change the ‘From’ text by editing /etc/passwd to receive mail from ‘root@server1.example.com’ instead of just ‘root’.
# chfn -f root@server1.example.com root
edit /etc/ssmtp/revaliases and add this line or add more line for another user
--------------------------------------------
# sSMTP aliases
#
# Format: local_account:outgoing_address:mailhub
#
# Example: root:your_login@your.domain:mailhub.your.domain[:port]
# where [:port] is an optional port number that defaults to 25.
root:alert@example.com:smtp.example.com:587
--------------------------------------------
to test it
# echo “test send email using ssmtp|mail -s “TEST” alert@example.com
once you are able to receive that test message, proceed to edit /etc/hosts.allow and add these 2 lines, so you will be notified if someone login to your sever
--------------------------------------------
SSHD: ALL: spawn (/bin/echo "SSH connection to %H from %h[%a]" | \
/usr/bin/mail -s "SSH Login Alert [server1.example.com]" alert@example.com)
--------------------------------------------
