Crazy idea for a simple internal firewall?

First off, please don't flame me if this idea is crazy.

I am colocating my first server that I am going to build this weekend. I am paying for colo space by the machine, so for now I will be able to afford one machine at the colo.

I am building into a tower case and I will have a lot of extra room. I will be running a tight ship on the server with ipchains, etc. I will do my best to keep up with security updates and everything else running a server entails.

My question is, can I install a very small linksys router inside the server case to provide additional security to my server?

I am aware of heat issues, the linksys router is spec'ed to up to 105 F operating environment. I am aware the wiring might be interesting to achieve. I am also aware that these little routers offer minimal security and that they were designed for home/DSL/Cable use.

However, I want to know: will this little router provide at least minimal additional security for my server?

I have a feeling I can pull off the engineering aspect of installing the router inside the case and keeping it cool, but if these little routers are completely worthless for security, or if there is some reason the router won't function in this fashion, I won't waste my time. My home linksys router has a plethora of options like port forwarding/filtering and stuff that would seem to be configurable for my purposes.

Thank you for any help.

 

 

 

 

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