Is it necessary another similar solution besides CFP?

Hi everybody,

I adopt the unity in most areas of life. So, for me, it must be enough only one firewall for all related issues. CFP makes me believe that is the best solution. However, I see some members of this forum who use others like PeerGuardian.

I want to ask that if it is necessary another similar solution besides CFP. No confusing, I mean firewall issues. Not antivirus, antispam etc.

Any comments?

Thanks
aXes