[Freeswitch-users] NAT port problem

Evan P. Hall evan at corpwest.com
Tue Feb 20 20:37:42 UTC 2018


We had this exact problem with these Panasonic phones.  We had a customer with 2 units that seemed identical to me, and one had this behavior and one didn’t. I tried resets, firmware updates, etc., but no hope for the one unit.  If it helps, the unit that is still actually working at their office shows useragent string of  Panasonic_KX-TGP550T04/12.58.

-Evan

From: FreeSWITCH-users [mailto:freeswitch-users-bounces at lists.freeswitch.org] On Behalf Of Sean Devoy
Sent: Tuesday, February 20, 2018 12:20 PM
To: FreeSWITCH Users Help <freeswitch-users at lists.freeswitch.org>
Subject: Re: [Freeswitch-users] NAT port problem

LOL!  Exactly.  This device is, shall we say, VERY BASIC.  It worked with the old router. When they upgraded to a SONICWALL I cannot get it to work. I have learned my lesson. In the future I will only allow a quality ATA and DECT phone for this type of solution. For the record this is a Panasonic KX-TGP550.

I tried alternate local port numbers.  I tried all the ALG settings on the SonicWALL.  I am upgrading from 1.2 <hangs head in shame> to 1.6 in hopes that NDLB rport will fix it.

Thanks to all who replied.

From: FreeSWITCH-users [mailto:freeswitch-users-bounces at lists.freeswitch.org] On Behalf Of Brian West
Sent: Monday, February 19, 2018 8:08 AM
To: FreeSWITCH Users Help <freeswitch-users at lists.freeswitch.org<mailto:freeswitch-users at lists.freeswitch.org>>
Subject: Re: [Freeswitch-users] NAT port problem

In this case its probably not an ALG, you should enable rport in your device and NOT force it with the NDLB param, if your device doesn't support it, throw that device in the trash or take a hammer to it, and buy a device from a manufacture that actually made an effort to implement SIP.

/b


On Mon, Feb 19, 2018 at 6:10 AM, Carlos Eduardo <kaduww at gmail.com<mailto:kaduww at gmail.com>> wrote:
It can be an ALG problem (https://www.voip-info.org/wiki/view/Routers+SIP+ALG). Try running another sip profile with a different sip port, 5070 for example, and register the phone using this port.

2018-02-18 19:43 GMT-03:00 Sean Devoy <sdevoy at bizfocused.com<mailto:sdevoy at bizfocused.com>>:
Thanks Brian.  I should have been more clear.  That was exactly my diagnosis and attempted fix using this line:
<param name="NDLB-force-rport" value="true"/>
in the <param> section of the <user> in the Directory file has no effect.

That means one of two things.  I am putting it in the wrong file or I must bite the bullet and get FS up to the current version.

Thanks again.

From: FreeSWITCH-users [mailto:freeswitch-users-bounces at lists.freeswitch.org<mailto:freeswitch-users-bounces at lists.freeswitch.org>] On Behalf Of Brian West
Sent: Sunday, February 18, 2018 11:51 AM
To: FreeSWITCH Users Help <freeswitch-users at lists.freeswitch.org<mailto:freeswitch-users at lists.freeswitch.org>>
Subject: Re: [Freeswitch-users] NAT port problem

Enable rport, The issue was from 15183 and we respond to 5074, so the device never receives the 401.

Nat 101

/b


On Sun, Feb 18, 2018 at 11:28 AM, Sean Devoy <sdevoy at bizfocused.com<mailto:sdevoy at bizfocused.com>> wrote:
HI all,

I have a NAT problem I can’t seem to get past.  The phone is NATed.  From my location with a FIOS router it works fine.  But the client recently upgraded to a new SonicWall router and splat, this device failed.  There are about 10 Cisco phones at this location working fine.  This phone is a Panasonic KX-TGP550.

I have poured over the sip logs and identified the problem.  The sip packets come from the router IP and port 15xxx but are returned to that IP and the phone’s source port 5060 instead of 15xxx.

I have tried every NDLB feature I can find, but not every combination. The responses always go back to the wrong port.

Any help would be greatly appreciated.

Thanks,
Sean

Sample sip dump:
    ------------------------------------------------------------------------
recv 492 bytes from udp/[98.204.241.22]:15183 at 23:16:33.764217:
   ------------------------------------------------------------------------
     REGISTER sip:XYZ.bizfocused.com:5060 SIP/2.0
     Via: SIP/2.0/UDP 192.168.2.109:5074;branch=z9hG4bKb6be703b
     Max-Forwards: 70
     To: <sip:34 at XYZ.bizfocused.com>
     From: <sip:34 at XYZ.bizfocused.com>;tag=3263080642<tel:(32)%206308-0642>
     Call-ID: 97742e94-d1dc14228bad9baadd810080f041d179 at 192.168.2.109<mailto:97742e94-d1dc14228bad9baadd810080f041d179 at 192.168.2.109>
     CSeq: 1 REGISTER
     Contact: <sip:34 at 192.168.2.109:5074>
     Expires: 3600
     Allow: INVITE,ACK,CANCEL,BYE,OPTIONS,NOTIFY,REFER,UPDATE
     User-Agent: Panasonic_KX-TGP550T04/13.33 (0080f041d179)
     Content-Length: 0

    ------------------------------------------------------------------------
send 669 bytes to udp/[98.204.241.22]:5074 at 23:16:33.764394:
   ------------------------------------------------------------------------
     SIP/2.0 401 Unauthorized



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Brian West | Co-founder and Developer

Need Commercial support? email sales at freeswitch.com<mailto:sales at freeswitch.com>

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