Nov
1
2008
Ryan C. Merritt
This is a guide on how to install and configure a firewall on your server. A firewall is one of the most import features of security on a server if NOT the MOST important.
First thing we are going to do is install APF (Advanced Policy Firewall) from R-fx Networks.
Log-in to the server with ssh and change to root user.
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no comments | posted in Linux, Scripts, Security
Oct
31
2008
Ryan C. Merritt
I recently decided to write a Root Login Notifier Script this script checks every user that logs in as root or switches user to root against your firewall’s allowed hosts if the IP address of the root user is not in the allowed hosts list it silent sends an email to the address specified in the script listing the the username they sudo from or logged in as, as well as their ip address, and the date/time. If the root user is in the allowed hosts list of the firewall it will echo “Welcome Super User”.
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no comments | posted in Linux, Scripts, Security