What's the situation that requires stateful firewall?

Posted by Eonil on Server Fault See other posts from Server Fault or by Eonil
Published on 2011-03-09T06:27:41Z Indexed on 2011/03/09 8:11 UTC
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firewall

I just know there is two kind of firewalls. Stateless and stateful. It's hard to determine what kind of firewall I have to use. Currently I have to run firewall within same machine runs services, Basically I want stateless because of its less resource consumption. However if it is not sufficient for security, it's meaningless. I'll run HTTP, SSH, NFS (only over SSH), and some custom made server on several TCP/UDP ports. Should I use stateful firewall?

(edit) Maybe the question can be assumed as 'Should I use stateful rules?'.

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