On Monday, February 24 2003, "Jiri Kuthan" wrote to "[EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED]" saying:
> On Fri, 21 Feb 2003 [EMAIL PROTECTED] wrote: > > > I have always assumed that even if a proxy is used as an outbound > > proxy, an ACK (or any request within a dialog for that matter) does not > > get sent to that outbound proxy unless the outbound proxy has > > record-routed. > > That's not the case always. Many phones keep sending ACK to outbound > proxy. > > > Having said that, I would expect that a stray ACK arriving at a proxy > > would just be dropped since it arrived there by accident. I also think > > that this might be implementation specific. > > That would cause the INVITE transaction to never complete in the case > I mention. So what do you recommend for the stray-ACK problem? I was wrong to say that ACK proxying is non-amplifying -- forwarding an ACK can cause a single UDP packet to trigger a DNS lookup and a TCP or TLS connection attempt. -- Jonathan Lennox [EMAIL PROTECTED] _______________________________________________ Sip-implementors mailing list [EMAIL PROTECTED] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
