Firewall This topic has 1 reply, 1 voice, and was last updated 21 years, 1 month ago by Mat. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts 24th October 2002 at 15:37 #22291 SodomGuest I am using Watchguard firewall and i want to use ip telephony which uses H323. (Cisco ATA 186). It works when i used SIP protocol, but i need to run this H323. Any suggestion. Thanks 25th October 2002 at 16:32 #22292 MatGuest I’m not familiar with WatchGuard but we have several customers with ATA units behind firewalls. You would need to let UDP and TCP traffic through, or punch a hole throught the wall for the specific port you are using. Useful port numbers can be found at: http://www.iss.net/security_center/advice/Exploits/Ports/default.htm Hope this helps Mat. Author Posts Viewing 2 posts - 1 through 2 (of 2 total) The forum ‘Voice over IP’ is closed to new topics and replies.