[Linphone-users] Re: linphone access when a firewall is involved...

[Petr Pisar]

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Simon Morlat wrote:
> SIP and RTP use UDP not TCP.

This is not true. According to RFC every SIP implementation has to
support SIP over TCP. Clients are also supposted to be ready to recieve
SIP message over TCP even if previous message of dialogue comes via UDP.
This is because of client should use TCP instead of UDP if the message
lenght is larger then MTU - (cca) 200 B.

- -- Petr

> 
> Le mercredi 14 juin 2006 21:39, William Bulley a écrit :
>> I have installed linphone 1.3.5 on two FreeBSD 6.1 machines
>> and demonstrated that it works as advertised on my local
>> (private) LAN between those two systems using non-routeable,
>> RFC-1918 (net ten) IP addresses.  When I try to use linphone
>> across the Internet to another FreeBSD 6.1 user also running
>> linphone 1.3.5 (both of us have firewalls), it does not work
>> as advertised.  We are able to connect using SIP and to chat
>> in the chat window (ASCII text only), so I do know that both
>> linphone configurations are correct at least for SIP.  However,
>> no RTP audio works between the two instances: my local linphone
>> and the remote (to me) user's linphone.
>>
>> Both of our firewalls have been configured to allow inbound
>> access from any source to our local LAN machines for both
>> the SIP protocol (on TCP port 5060) and the RTP protocol (on
>> TCP port 7078).  Since the complete linphone application is
>> known to work on my local LAN between two local machines, I
>> am suspecting that something is amiss with the configuration
>> of the firewall on my end or the firewall on the other end.
>>
>> I can give further details of my firewall setup if needed,
>> but I thought I might ask here first if there is something
>> else that I need to check.  Maybe I am missing something
>> obvious (but not to a new user of linphone) that is simple
>> to correct.  Thanks!
>>
>> Regards,
>>
>> web...
>>
>> --
>> William Bulley                     Email: address@hidden
>>
>>
>>
>> _______________________________________________
>> Linphone-users mailing list
>> address@hidden
>> http://lists.nongnu.org/mailman/listinfo/linphone-users

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