RV320 Discover VoIP thru Wan Port

[ConnectionTech2]

We installed a RV320 to replace a MikroTik Router in a remote building that is connected via a PTP Ubiquiti 1GB Wireless Link.  We are using the Router as a DHCP server for this building and we have VoIP Phones in the building as well.  The reason for the replacement is to get the full bandwidth thru the Gigabit WAN port of the RV320.  The RV320 works great for speed test and was an improvement when testing data.  WE are able to ping thru it from the front building subnet 10.3.1.0 to the back building 10.3.7.0.  We thought everything was fine until we noticed none of the VoIP Phones worked.  It seems the VoIP Server on the WAN Side cannot see thru the RV320 to find the VoIP Phone sets even though we can ping them.  Please advise as to what we can do to make this transparent.  We did turn off the Firewall and SPI.  The ports the VoIP Server uses are UDP 5000-5082 and UDP 10000 - 20000.  Any help is much appreciated.  Thank you.  It works through the MikroTik.

[jroman@halyard-tech.com]

We are running a Cisco RV325 and using an AT&T SB67070 SIP Gateway with an SB67050 ATA. We were running into a problem where calls would come into our network but when we answered there would be no audio in either direction, but we could call out using the same phone. We were told by our service provider that the problem was that when the 200 ok was being sent out it was giving out a local IP to call back to instead of our external IP address.

We were able to fix this by utilizing the RV325s DMZ Host. (Setup > DMZ Host)

Here we entered the IP address of the SIP Gateway and that fixed our problem.

This was one of several things we did. Under Firewall > General we also

Enabled: Firewall, Remote Management, SPI ALG, and UPnP

Disabled: SPI, Dos, Block Wan Request, Multicast Pass Through, HTTPS, SSH, and Remote SSH.

Under System Management we also disabled LLDP and Discovery-Bonjour.

We did all of these things based off the advice of different service providers and all of them together seem to work. I am not sure whether or not some of these settings can be changed.

We also had to set up port forwarding for 5060 udp and tcp, as well as 10000-20000 with the ports being forwarded to the IP address of the SIP.