[CentOS] Centos Router

I pretty much left them at the defaults.  I tuned a couple tcp  
settings based on RHEL's best practices guide, but there wasn't any  
noticeable performance impact.

>
> In your configuration did you tune any sysctl settings or leave with
> defaults?
>
> Graham Johnston
> Manager, Network Services
> Westman Communications Group
> 204.571.7225
> johnstong at westmancom.com