FOOD FOR THOUGHT Endpoints Can't Connect to Server

[Alex Hackney]

I have a cloud based server and a client behind a sonicwall firewall (not my choice). The endpoints can connect but get timed out after a while.

What can I do to fix this (besides dropping the sonicwall).

Seems like there would be a timeout setting for the voip service but I don't use these and their it company is lost.

 

[krzykat]

If your endpoints are configured properly, and for example have register = 60 seconds, then it may very well be a router issue with perhaps SIP ALG enabled.

 

[Alex Hackney]

They are grandstream phones. I never had to change anything but the sip server info. They will connect and take calls for a few mins then time out and show as not available in the cli.

Should that be enabled or disabled?

 

[krzykat]

On a router, almost always ... I disable SIP ALG .. I think I've only had one time when it actually helped.
I'd definitely look at your phones, registration expiration:

 

[Alex Hackney]

Mine are all set to 60. I was able to get a little longer time but upping the frequency but I dont want to have to have them reboot every so often. I'm waiting on the sonicwall password so I can set it to disabled.

Thanks for your help.

 

[krzykat]

By changing them from 60 to 1, all you are doing is sending a sip registration packet every minute. You won't have to reboot, and if you are losing registration every so often, more than likely this will fix your issue.

 

[Alex Hackney]

Ok I'll try that. Thanks

 

[dhoppy]

Did you change the NAT traversal to "Keep Alive"?It is under the network settings of each account.

 

[Alex Hackney]

No I changed nothing beyond the sip server settings.

 

[dhoppy]

When I have the issue you are describing, I change to "keep alive."

 

[Alex Hackney]

@dhoppy is that on the endpoint or the server?

 

[dhoppy]

On the endpoint. In a Grandstream device see my attached image. On the server I set the extension to NAT MODE = Yes.

this is on the endpoint:


this is on the server: