Solved FreePBX and SonicWall intermittent inbound calls
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If I remember right, I thought in the Sonicwall world you actually wanted to enable SIP transformations. I specifically remember having to do that once for a NTG customer that was connecting to a cloud PBX and getting one-way audio otherwise. That was a little over 3 years ago, so perhaps the setting is no longer counter-intuitive now.
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Found the magic checkbox. Under SIP settings, had to check the box for Enable consistent NAT. I did have to reboot the phone for the change to take effect.
When we checked the box for "Enable SIP Transformations" we got the one way audio thing. On the remote side. the phone would ring and ring and eventually go to voicemail. On the local side, the phone would ring, and he would answer, but couldn't hear anything.
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@Mike-Davis said in FreePBX and SonicWall intermittent inbound calls:
Found the magic checkbox. Under SIP settings, had to check the box for Enable consistent NAT. I did have to reboot the phone for the change to take effect.
When we checked the box for "Enable SIP Transformations" we got the one way audio thing. On the remote side. the phone would ring and ring and eventually go to voicemail. On the local side, the phone would ring, and he would answer, but couldn't hear anything.
"Enable Consistent NAT".... I guess maybe I have some learning to do here, but NAT can be inconsistent?!
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@FiyaFly said in FreePBX and SonicWall intermittent inbound calls:
@Mike-Davis said in FreePBX and SonicWall intermittent inbound calls:
Found the magic checkbox. Under SIP settings, had to check the box for Enable consistent NAT. I did have to reboot the phone for the change to take effect.
When we checked the box for "Enable SIP Transformations" we got the one way audio thing. On the remote side. the phone would ring and ring and eventually go to voicemail. On the local side, the phone would ring, and he would answer, but couldn't hear anything.
"Enable Consistent NAT".... I guess maybe I have some learning to do here, but NAT can be inconsistent?!
By default. That is normal. Every new connection should get a random port. This setting breaks that.
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@JaredBusch said in FreePBX and SonicWall intermittent inbound calls:
@FiyaFly said in FreePBX and SonicWall intermittent inbound calls:
@Mike-Davis said in FreePBX and SonicWall intermittent inbound calls:
Found the magic checkbox. Under SIP settings, had to check the box for Enable consistent NAT. I did have to reboot the phone for the change to take effect.
When we checked the box for "Enable SIP Transformations" we got the one way audio thing. On the remote side. the phone would ring and ring and eventually go to voicemail. On the local side, the phone would ring, and he would answer, but couldn't hear anything.
"Enable Consistent NAT".... I guess maybe I have some learning to do here, but NAT can be inconsistent?!
By default. That is normal. Every new connection should get a random port. This setting breaks that.
Okay, then maybe i just misunderstood it. I knew that was the concept of NAT, but the way I read it was that it was essentially always changing ports for one connection.
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@FiyaFly Well, it inconsistent is how it was behaving.
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@Mike-Davis said in FreePBX and SonicWall intermittent inbound calls:
@FiyaFly Well, it inconsistent is how it was behaving.
Fair point. Fair point indeed. lol. I will admit, I have a rule of thumb with inconsistent problems. If it's on a computer, first assumption is hardware.
For something like this, first assumption is Firewall, and more specifically NAT.
