Understanding why FS replies with "407 Proxy Authentication Required" on internal INVITE
Hello everyone, we have a current FreeSWITCH installation (v1.10.6) that interfaces internal users with upstream gateways. All clients work flawlessly, except for an AVM FritzBox (short: FB), which exhibits the following behavior: When FB initiates a call to another user or external number, FreeSWITCH responds with a "407 Proxy Authentication Required" response although the dialplan is the same as for the clients that do not exhibit this behavior. This confuses the FB's SIP stack, which consequently reports a timeout and drops the call. A (redacted) SIP trace is available at: https://gist.github.com/ginkel/5c7dd3723f92e0137d5f357451dc7ac6 All clients as well the FS server reside in the same RFC1918 network. Other Polycom or Yealink clients are unaffected. Any ideas what might cause this? Thanks, Thilo
Look at where it's sending the 407, bet you the device never receives the challenge, most likely due to nat related settings. On Thu, May 20, 2021 at 8:26 AM Thilo-Alexander Ginkel <thilo@ginkel.com> wrote:
Hello everyone,
we have a current FreeSWITCH installation (v1.10.6) that interfaces internal users with upstream gateways. All clients work flawlessly, except for an AVM FritzBox (short: FB), which exhibits the following behavior:
When FB initiates a call to another user or external number, FreeSWITCH responds with a "407 Proxy Authentication Required" response although the dialplan is the same as for the clients that do not exhibit this behavior. This confuses the FB's SIP stack, which consequently reports a timeout and drops the call.
A (redacted) SIP trace is available at: https://gist.github.com/ginkel/5c7dd3723f92e0137d5f357451dc7ac6
All clients as well the FS server reside in the same RFC1918 network.
Other Polycom or Yealink clients are unaffected.
Any ideas what might cause this?
Thanks, Thilo _________________________________________________________________________
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participants (2)
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Brian West
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Thilo-Alexander Ginkel