[Freeswitch-users] Reasons for a SIP/2.0 400 Bad Request ? [ SOLVED ]

[Avi Marcus]

On a related note, my parents complained about dropped SIP calls on a
Linksys ATA.
Replacing the 3 yr old Aztech DSL modem, and the verizon actiontec router,
with a new d-link modem/router has resulted in no dropped calls. So.. buggy
modem/routers affecting calls might be more common than you think.

-Avi Marcus


On Thu, Nov 24, 2011 at 5:34 PM, Charlie Orford <
charlie.orford at attackplan.net> wrote:

> Hi Chris
>
> I don't know why but replacing the router (a 5 year old Draytek Vigor
> 2600) with a linux machine + pppoe modem fixed the problem.
>
> No change was needed with the phones and they are still behind NAT (but
> this time its managed by iptables).
>
> Buggy router I guess....
>
>
> On 24/11/2011 15:27, Charlie Orford wrote:
> > Hmm it doesn't look like it is a fragmentation problem. Same "400 Bad
> > Request" response even with the INVITE at 995 bytes:
> >
> > http://pastebin.freeswitch.org/17868
> > http://pastebin.freeswitch.org/17867
> >
> > FYI, issuing "ping -f -l 1470 my.fs.server.com" from a windows
> > workstation on the same network as the phone goes through ok (so I think
> > this means as long as the INVITE packet is 1470 bytes or less, it should
> > not get fragmented).
> >
> > Is there anything else I can debug to track this down?
> >
> > Charlie
> >
> >
> > On 24/11/2011 14:59, chrisbware at interfree.it wrote:
> >> Your INVITE is 1672 bytes. Some router split packet over 1500 bytes. To
> test if this is the problema, disable all codecs leaving only "basic
> codecs" as Aastra call them (g711a,g711u,g729) and disable ice. Packet
> should be smaller: if the problem is fixed in this way, packet
> fragmentation is the cause.
> >>
> >>
> >> -----Messaggio originale-----
> >> Da: Charlie Orford<charlie.orford at attackplan.net>
> >> Inviato il: 24 Nov 2011 - 13:47
> >> A: FreeSWITCH Users Help<freeswitch-users at lists.freeswitch.org>
> >>
> >>
> >> Hi Chris,
> >>
> >> I've increased the debugging and taken a new trace:
> >>
> >> http://pastebin.freeswitch.org/17864
> >>
> >> And here is the output of tport_sip.log:
> >>
> >> http://pastebin.freeswitch.org/17865
> >>
> >> A person on the #freeswitch IRC channel suggested the problem might be
> >> due to packet fragmentation?
> >>
> >> Charlie
> >>
> >>
> >> On 24/11/2011 14:29, chrisbware at interfree.it wrote:
> >>> I suspect problem is on SDP but we can't see it on pastebin.
> >>> -----Messaggio originale-----
> >>> Da: Charlie Orford
> >>> Inviato il: 24 Nov 2011 - 10:17
> >>> A: FreeSWITCH Users Help
> >>>
> >>>
> >>> Hi list
> >>>
> >>> I have done some googling but cannot find much info about what causes
> FS
> >>> to send a SIP/2.0 400 Bad Request response.
> >>>
> >>> My phones are able to register but when I try a test call (e.g. to
> 9196)
> >>> FS responds to the INVITE with Bad Request. For a short transcript of
> >>> this in action see: http://pastebin.freeswitch.org/17863
> >>>
> >>> My setup:
> >>> I have a clean git head install (cloned yesterday) and am running the
> >>> unmodified "out of the box" configuration (except I have enabled
> >>> NDLB-force-rport on the internal profile and set a default poassword).
> >>> FS is on a public server (no nat) and phones (aastra 57i models) are
> all
> >>> natted behind an ADSL router.
> >>>
> >>> Thanks&   Regards,
> >>> Charlie
> >>>
> >>>
> >>>
> >>>
> >>>
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