Firewalls
« Previous EntriesModsecurity On Centos 4.7 64 Bit Architecture
Friday, December 12th, 2008Some might have a problem installing Mod Security on Centos 4.7 and 64 bit architectures, if following the instructions on the Modsecurity website.
My webserver has been upgraded to httpd-2.0.52-41 using the CentosPlus repository. I don’t know if others using versions previous to this will have the same problem or not - but it has to […]
Iptables And Remote Port 25 Blocking
Sunday, March 16th, 2008With many ISP’s today blocking remote port 25 connections for what they think is spam prevention, many users are complaining that they are unable to send through the email server they wish to send through.
If this is something that has happened to you, here’s something you might want to refer your ISP to, or if […]
Troubleshooting Linux Firewalls - Book Review
Sunday, March 16th, 2008I’ve been wanting to increase my knowledge of iptables and netfilter, the firewall system that comes with most Linux distributions. I knew some of the basics, but I decided it was time for me to increase my knowledge.
So I went looking for a book, I came across Troubleshooting Linux Firewalls, and at first, the […]
Iptables And Remote Port 25 Blocking
Sunday, March 16th, 2008With many ISP’s today blocking remote port 25 connections for what they think is spam prevention, many users are complaining that they are unable to send through the email server they wish to send through.
If this is something that has happened to you, here’s something you might want to refer your ISP to, or if […]
A Web App Server Firewall In Five Minutes
Sunday, March 16th, 2008So you have spent some time building your firewall, but attacks on your webserver continue and you don’t find out about them until later? Maybe you never find out about them as the attacks use SSL - encrypted traffic which your firewall is not able to inspect.
What to do? Well, using ‘ModSecurity’, a module […]
How Firewalls Work
Saturday, March 15th, 2008Wondering what a firewall is or how they work? Great article here from How Stuff Works.
Link to: http://www.howstuffworks.com/firewall.htm