[Freeswitch-users] fs_nat=yes on webrtc connection

Maximilian Leonhard Dorn maximilian.dorn at pinguin.ag
Thu Feb 11 12:33:04 UTC 2021

Hi everyone,

I am currently working with sip.js and freeswitch which is currently connecting to our freeswitch via the our internal network.
Looking at the registration I am seeing that the contact show fs_nat= yes. Here the registration from the server.

Call-ID:        6ctjv10kv92d3eft9i6lc7
User:           01234678 at example.com<mailto:01234678 at example.com>
Contact:        "01234678" <sip:01234678 at example.com;transport=ws;fs_nat=yes;fs_path=sip%3A01234678%4010.128.130.129%3A51786%3Btransport%3Dwss>
Agent:          SIP.js/0.15.10
Status:         Registered(WSS-NAT)(unknown) EXP(2021-02-11 13:10:07) EXPSECS(658)
Ping-Status:    Reachable
Ping-Time:      0.00
Host:           example
Port:           51786
Auth-User:      unknown
Auth-Realm:     example.com
MWI-Account:    01234678 at example.com<mailto:01234678 at example.com>

Nat detection is disabled for the freeswitch and a normal snom phone registering to the server does not show the fs_nat=yes
Does freeswitch always detect nat for webrtc connections? Or is there possibly something wrong in my configuration?

Kind Regards,

Phone:    +491752242485
Mail:       maximilian.dorn at pinguin.ag

Phone:  +49.30.30 36 63 366
Fax:       +49.30.30 36 63 367
E-Mail: info at pinguin.ag<mailto:info at pinguin.ag>



Pinguin AG
Hauptstra?e 8 | 10827 Berlin | Germany

USt-ID: DE240701807

Sitz der Gesellschaft: Berlin-Sch?neberg, AG Berlin-Charlottenburg, HRB 101380 B
Vorstand: Roland Becker, Aufsichtsratsvorsitzender: Clemens C. Vogelsberg
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freeswitch.org/pipermail/freeswitch-users/attachments/20210211/09049adf/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: pinguin.ag_f1f2f94b-4088-4a1c-afba-e73816a444e1.png
Type: image/png
Size: 5020 bytes
Desc: pinguin.ag_f1f2f94b-4088-4a1c-afba-e73816a444e1.png
URL: <http://lists.freeswitch.org/pipermail/freeswitch-users/attachments/20210211/09049adf/attachment-0001.png>

More information about the FreeSWITCH-users mailing list