15 Mar
2004
15 Mar
'04
1:32 p.m.
On 15-03 11:42, Klaus Darilion wrote:
Hi!
I've got a small problem and don't know how to solve it best, so I would
appreciate your comments:
I want to allow my ser users to call any IP destination for free and
always, but I want to restrict access to the PSTN. Therefore, I
authenticate, account and check if user is in PSTN group before
forwarding to the gateway (local GW or the GW of an PSTN termination
provider).
But, for example if one of my users call 1234567(a)anydomain.com and this
domain resolvs to the IP address of the gateway, the request would be
forwarded to the gateway, and the GW would accept the call as it comes
from a trusted SIP proxy. How can I prevent this?
Perhaps the gateway could refuse messages which don't have the IP
address of the gateway in the Request-URI ? In this case
1234567(a)mydomain.com would be refused even if it is coming from a
trusted proxy.
Jan.