We are getting ready to switch over to VoIP and I have received a phone to test with, before deploying the solution to our organization.
If I put a firewall policy in place to block all inbound traffic from the WAN (internet) to our new VoIP subnet, the phone still works as it should. Why is that? The packet count for the policy stays at 0 wether I allow traffic or deny it, so that tells me that the policy is never traversed.
I thought I would have to allow traffic out to the WAN from our VoIP subnet, but also allow traffic from the WAN to our VoIP subnet, but the later seems to have no effect as the phone works with just letting the traffic out to the WAN regardless of the incoming setting. Is this normal behavior?