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Maybe odd nat issue!!

  • mikeyhgz
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16 Apr 2018 09:46 #91335 by mikeyhgz
Maybe odd nat issue!! was created by mikeyhgz
Hello all,

Looking for some help.

Quick background. We have a Virgin Media Router with a rotatable /29 from here to the Draytek. We have the Draytek going into a switch and the PBX connections to this switch. ( all this works fine).

The issue is when calls are idle ( no calls in or out over a 48 period) we cant seem to get calls in IN ( we are getting 401 send back from the SIP carrier). To fix this we make a call OUT and this issues goes away.

We think we have a NAT timer issue on Draytek or double NAT issues.

Has any seen this before?

Thanks

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17 Apr 2018 15:17 #91341 by admin3
Replied by admin3 on topic Re: Maybe odd nat issue!!
That's the DrayTek router's UDP session timeout value ending your idle SIP sessions.

To fix that, use the "portmaptime" command in the router's CLI.

"portmaptime -l" - view the current settings.

"portmaptime -u 86400" - increase the UDP session timeout to 24 hours (86400 seconds).

That should fix it :)



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  • mikeyhgz
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17 Apr 2018 18:25 #91349 by mikeyhgz
Replied by mikeyhgz on topic Re: Maybe odd nat issue!!
Thanks will give that a go!

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