With the current discuss of "Performance of CentOS as a NAT gateway", I am curious how many people out there are using CentOS as a Router/Firewall in an enterprise or service provider environment.  For myself I am not really concerned about NAT just a stateful firewall.

The other half of my questions is about performance.  I have read many articles and posts on the net about performance tuning but they all seem to be about tuning a single host, not a router.  Does any have any tips in this area?  Is tuning even required.

For the sake of the conversation lets assume I am referring to CentOS 5.

Graham Johnston Manager, Network Services Westman Communications Group 204.571.7225 johnstong@westmancom.com