PBX Firewall on router makes only 2 of 3 phones ring?

ASUS router on office network

Firewall UP
1 or 2 phones will not receive calls these same phones will most of the time be able to make calls out

Firewall DOWN
all 3 phones work in a stable way as they should

Any ideas and or help would be appreciated…

thanks!

Hi!

It would kind of help to know where these phones are in relation to each other (somehow I have a feeling they are not all on your LAN) but a common recommandation for Asus routers seems to be to disable SIP ALG, it apparently does more harm than good…

Good luck and have a nice day!

Nick

sure I knew there would be questions… and more info needed and I apologize for being vague…

these 3 phones are in one location and connect to the PBX server housed in another location. I am pretty sure it is router related because I have another ring on a different router that worked fine without issue…

so there is a ring, on a different router, that is connecting without issue.

and I am fairly certain this ONLY occurs when the firewall is enabled…