Hello!, I've been thinking to make my own virtual environments for a while and I started yesterday. I am running CentOS 5.5 64Bit Everything was fine, I've gathered some information on IRC. Everything was fine when I downloaded the Repo's, installed a huge update with 'yum update', it went fine, I have restarted the server. The server did worked fine after that, I've edited file etc/sysctl.conf and then restarted it and after that, I could not connect to it's website or SSH. I did followed a guide, I can not find it because I am on some different PC. -Jeroen
I hope you have disabled SELinux. Check if there are any iptables related stuff stopping the network flow, and if there are, then consider flushing your rules on the host. If you are going to flush, then make sure that your server is within the firewalled environment.
If I am correct I did disable SELinux. I will look for more options.