2011/12/16 Worley, Dale R (Dale) <[email protected]>: >> From: Iñaki Baz Castillo [[email protected]] >> >> Currently I don't consider the case of a loop between two >> proxies, I expect it to be too much error prune and difficult to >> design. In my experience most of the loops occur within a single proxy >> when they receive a request for a domain pointing to it without the >> proxy being aware of it For now I avoid just it. > > It is easy to detect multi-proxy loops by comparing the calculated > token with all of the Via values.
Right, I will consider doing it. > It is relatively uncommon to > accidentally have a loop of more than one proxy. But I expect that a > malicious system could arrange it easily. IMHO it's very hard since it requires two proxies to behave as "open relay". It would be easier with in-dialog requests however. But my proxy does not allow an in-dialog request if it does not contain Route header(s) pointing to it, so after the first iteration it would reject the same in-dialog request if it comes back. Regards. -- Iñaki Baz Castillo <[email protected]> _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
