Hello all,

I am searching for a tool which will produce a sound alert when an attempt to connect through ssh is made

Thanks

Not sure of a tool already out there but it wouldn't be hard to write a script yourself to check the logs say every couple of minutes or so. Not sure why you'd want this, to me it would get annoying as much as some of my own servers get hit with someone trying to login as root thru ssh. I just ignore them since logging in directly as root is disabled, which is the smartest thing to do.

You could just add a beep noise to one of the login scripts, but i'm not sure if that would play for remote logins.

No problem, check out this nice tutorial on email notification for root logins. Keeping track of who logs into your server and when is very important, especially when you're dealing with the super user account. We recommend that you use an email address not hosted on the server your sending the alert from.

So lets get started!

1. Login to your server and su to root, I know the irony!

2. cd /root

3. pico .bashrc

4. Scroll to the end of the file then add the following:
echo 'ALERT - Root Shell Access (YourserverName) on:' `date` `who` | mail -s "Alert: Root Access from `who | cut -d'(' -f2 | cut -d')' -f1`" you@yourdomain.com

Replace YourServerName with the handle for your actual server
Replace you@yourdomain.com with your actual email address

5. Crtl + X then Y

Now logout of SSH, close the connection and log back in! You should receive an email address of the root login alert a few minutes afterwards.

Note: This is a great tool for servers that have multiple admins or if you give someone SSH access for whatever reason, although you should give out the root password to as few people as humanly possible and be sure to change it often.

This will not magically alert you when a hacker runs the latest kernel exploit on your server and logs into SSH because they will create their own SSH/telnet connection. You should keep your system up to date, install a firewall and follow the latest security releases.



Similar Articles : Compile 2.6.7, 2.6.8, 2.6.8.1, 2.6.9, 2.6.10, 2.6.11.6 Kernel w/module-init-tools, Rkhunter Installation, Detect and Clean a hacked server T0rnkit Tutorial, How to install KISS Firewall, How to Disable Telnet, How to install mod_security for Apache, How to install BFD (Brute Force Detection), How to install APF (Advanced Policy Firewall), E-mail Alert on Root SSH Login, Mask Your Web Server for Enhanced Security, Guide to Chkrootkit - checking for intruders, Creating a Welcome message for SSH logins, Disable Direct Root Login, RootCheck - Root Check, Changing APF log for TDP/UDP drop's