We have a SonicWALL NSA 3600 at our main site and various TZ SonicWALLs at remote sites running point to point VPN. Lately there's been issues with calls dropping for users at the remote sites. From what I'm told, site to site calls are fine, but it's any incoming our outgoing from the remote sites will drop. VoIP runs over the VPN tunnel.
Other changes I've made include:
- Enabled consistent NAT, but nothing should be getting NATed
- Increased UDP timeout to 120 seconds
- Excluded Allworx from DPI
- Excluded the VPN > LAN and LAN > VPN from DPI
- Enabled BWM in one location
Any more ideas?