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Should You Enable SPI firewall On Routers....?

post #1 of 3
Thread Starter 
hello i would first like to say i a complete networking novice. Aside from few basic things, and my wireless I barely use myself ( aka if my parents internet works and not broken we all don't really care).

Anyways I have and upgraded to d-link dir 655 and ever since my old netgear router used to turn off spi firewall because of a crap ton of problems i had with final fantasy 11 way back in 2004, and bittorrents never worked right even after port foward.

Anyways fast foward to today and I tried to port foward Utorrent, and every time i did the check for ports i always get message that says its blocked.

so i tried to disable SPI and it magically worked.

so:

1) is SPI firewall really necessary ? I am running norton internet security 2012 for firewall and windows firewall so I don't feel like i need any extra protection.

2) will my internet performane slow down or increase for turning this off?

3) from what i read this makes the router not need to port forward? is this true or will I still have to forward ports anyways?

any information is appreciated.
post #2 of 3
Start here:
http://en.wikipedia.org/wiki/Stateful_firewall
post #3 of 3
Why are you running two software firewalls at once? That can cause conflicts. Only run one software firewall.

At least with DD-WRT, SPI firewall does not block port forwarding. Manually open ports or enable UPnP (less secure) for port forwarding.
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