SonicWALL Enhanced OS:
The Enhanced OS is more consistent and reliable than the Standard OS, but there have been a few revisions of the Enhanced OS that have similar problems as well. This version of SonicWALL is not recommended, but in many cases can be supported.
The configuration steps below solve a number of issues:
NOTE: Due to the variety of software versions, the instructions below may not be entirely accurate, though should stay relatively consistent. Please ensure a Network Administrator familiar with the SonicWall device configures the settings below.
To Disable SIP ALG and Double NAT, and Enable Multicast:
To Enter VoIP Firewall Access Rules – LAN to WAN:
A total of four access rules will need to be created. Two access rules for LAN to WAN, and two access rules for WAN to LAN. Each rule will specify two different IP ranges for VoIP service provided by carrier.
Continuing Setup with VoIP Firewall Access Rules – WAN to LAN:
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