[Asterisk-Users] OT: SIPSAK usage

[Christian Stredicke]

snom phones by default do not accept SIP messages from other
destinations that the registrar (in this case they send a error
response) and they dont listen on port 5060 by default. Reason:
SECURITY!!!

If you want to lower your security, you can manually specify the SIP
port to 5060 and manually disable the filering from the proxy/registrar.
But then dont complain if people make a fun out of themselves by making
your phone ring with funny SIPSAK requests!!!

I think the best practice on this is to send the requests to the proxy
which then will forward the packets depending on the proxy's security
policy. Replace proxy with Asterisk!

Christian

> -----Original Message-----
> From: asterisk-users-bounces at lists.digium.com 
> [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of 
> Colin Anderson
> Sent: Friday, September 30, 2005 4:31 PM
> To: 'Asterisk Users Mailing List - Non-Commercial Discussion'
> Subject: RE: [Asterisk-Users] OT: SIPSAK usage 
> 
> I'm using sipsak to send messages to Snoms in my subnet. At 
> work, works
> fine:
> 
> sipsak -M -O desktop -B "foo" -s sip:1001 at 192.168.1.220 -H 
> 192.168.1.46
> 
> displays "foo" on the Snom display
> 
> On my home LAN (AAH 1.5, Snom 190 3.60s, switched 100, no 
> VLAN, no routing) the same command (modified for my LAN) 
> always yields:
> 
> (type: 3, code: 3): from 192.168.171.8 
> 
> at the console of the sending machine. Same if I use FQDN.  
> Type 3 Code 3 means "ICMP port unreachable" 
> 
> Doing a PCAP from the phone indicates that the Snom gets the 
> message, but nothing shows up in the SIP log. Doing tcpdump 
> on the originating machine yields something like "Reply from 
> 192.168.171.8 > 192.168.171.10 UDP port 5060 unreachable"
> 
> Same phones, same firmware rev, same version of sipsak, no 
> IPTABLES on the originating machine, DNS lookups work, call 
> behavior is normal, other SIP behavior like MWI works fine. I 
> got nuthin here, anyone got a tip?
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