[Users] Allow only TLS connections

[Daniel-Constantin Mierla]

Hello,

On 04/13/06 11:52, Christoph Fürstaller wrote:
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> Hi,
>
> I tried that out. I check if proto is TLS:
> if (proto != TLS) {
> 	sl_send_reply("403", "Forbidden");
> 	exit;
> };
>
> But I get this error:
>  3(28893) ERROR:tm:add_uac: can't fwd to af 2, proto 1  (no
> corresponding listening socket)
>  3(28893) ERROR:tm:t_forward_nonack: failure to add branches
>  3(28893) ERROR:tm:t_relay_to:  t_forward_nonack returned error
>
> What does it mean? What I'm doing wrong?
> My SER is only listening on tls port 5061. Do I still have to open udp
> 5060 ?
>   
it seems that you try to forward on UDP. You can configure openser to 
listen on UDP as well, and drop messages coming on UDP, if you want to 
accept only TLS. (as you have in above snippet). If all peers you 
connect to support TLS, then you can forse sending over TLS all the time.

Cheers,
Daniel

> chris...
>
> Cesc wrote:
>   
>> http://openser.org/dokuwiki/doku.php?id=openser_core_cookbook&DokuWiki=6c17b007ea61fa37b86b391ce1b2a80f#tcp
>>
>>
>>
>> On 4/11/06, Thorsten.Haupt at t-systems.com <Thorsten.Haupt at t-systems.com> wrote:
>>
>>     
>>> I searched for this function, but I didn't found it :-(
>>> Knows anyone the correct code, not only pseudo-code?
>>>
>>> Torsten
>>>
>>> -----Ursprüngliche Nachricht-----
>>> Von: Cesc [mailto:cesc.santa at gmail.com]
>>> Gesendet: Dienstag, 11. April 2006 14:03
>>> An: Haupt, Thorsten
>>> Cc: users at openser.org
>>> Betreff: Re: [Users] Allow only TLS connections
>>>
>>> I think in openser there is a function to check what transport the message came in ... you can do something like:
>>> if ( transport != TLS ) {
>>>          send error to UA
>>>          break;
>>> }
>>>
>>> Cesc
>>>
>>> On 4/11/06, Thorsten.Haupt at t-systems.com <Thorsten.Haupt at t-systems.com> wrote:
>>>
>>>       
>>>> Hello,
>>>>
>>>> I use OpenSER in a testing environment for VoIP security. My clients
>>>> connect via TLS. If I deactivate UDP/5060 on the server, it doesn't work correct.
>>>> Some Clients can't connect and others can't establish calls. I read in
>>>> another thread, that UDP is mandatory for SIP and that the server need it.
>>>>
>>>> But how can I prevent users from connecting via UDP and force them to
>>>> use TLS? I tried a firewall, blocking UDP and TCP on port 5060. But is
>>>> this the correct way? Are there any parameters server-side to force
>>>> users to connect via TLS?
>>>>
>>>> Thanks for response.
>>>> Torsten
>>>> _______________________________________________
>>>> Users mailing list
>>>> Users at openser.org
>>>> http://openser.org/cgi-bin/mailman/listinfo/users
>>>>
>>>>
>>>>
>>>>         
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>>>       
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>>     
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