ZyXel Port Forwarding Security Risk?

[Aelred89]

Hi all,

I've recently started using a ZyXel P-660HW-D1 and to enable port forwarding I have to untick 'active firewall' this seems like a silly thing to do to me. If I untick this box will it turn off the firewall? I've searched the internet for an answer to this question to no avail (probably because I'm being a n00b) but hopefully someone here will be able to help

 

[PistolPete]

I used to have a 660R-C1 and you never had to drop the firewall to do that.
It was a 100% PITA to configure port forwarding properly on it tho.