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    SubjectRe: [PATCH/RFC] netfilter: nf_conntrack_sip: Handle quirky Cisco phones
    On 14.11.2010 20:57, Eric Dumazet wrote:
    > Le dimanche 14 novembre 2010 à 10:33 -0800, Kevin Cernekee a écrit :
    >> On Sun, Nov 14, 2010 at 12:59 AM, Eric Dumazet <eric.dumazet@gmail.com> wrote:
    >>> I would like to get an exact SIP exchange to make sure their is not
    >>> another way to handle this without adding a "Cisco" string somewhere...
    >>>
    >>> Please provide a pcap or tcpdump -A
    >>
    >> Existing nf_nat_sip: phone sends unauthenticated REGISTER requests
    >> over and over again, because it is not seeing the replies sent back to
    >> port 50070:
    >>
    >> 10:05:53.496479 IP 192.168.2.28.50070 > 67.215.241.250.5060: SIP, length: 723
    >> E`...[..@.r.....C...........REGISTER sip:losangeles.voip.ms SIP/2.0
    >> Via: SIP/2.0/
    >>
    >
    > Hmm, partial tcpdump... you should use" tcpdump -s 1000 -A"
    >
    > We miss the
    >
    > Via: SIP/2.0/UDP 192.168.2.28:5060;branch=xxxxxxxx
    >
    >
    > Maybe a fix would be to use this "5060" port, instead of hardcoding it
    > like you did ?

    I agree, using the Via header to route the response makes more sense.

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