Question Allowing something through Firewall

[Connor99z]

When i turn my Avast Anti Virus off my NAT type on MW2 turns to open, whereas when i turn my Firewall back on my NAT type goes back to strict, i have port forwarded all the ports for MW2 on my router but this doesn't change the Strict NAT Type, how would i fix this via my firewall?

 

[popatim]

Sounds like you need to check Avast's firewall.