What you find to add avast, the option firewall?
When avast goes to have this option, so that firewall can be configured?
This has been explained/discussed before.
Avast is AV software not a firewall and there are no plans to change that.
I use Sygate ( free version ) and I don’t have any problem with it.
Try it and you’ll see that there’s no need to add a firewall to Avast.