Hi Chris! Chris Maciejewski schrieb: > My understanding of RFC 3261 is that Qutecom (or any other SIP > (soft)phone - User Agent) is in fact both User Agent Client and User > Agent Server. See RFC 3261 - page 25: > > "User Agent (UA): A logical entity that can act as both a user > agent client and user agent server." > > It acts as UAC when sending "INVITE" to make "outbound" call, but acts > as UAS when replying to "inbound" INVITE from proxy/other UAC. > > Also it is perfectly valid to make SIP "calls" directly between User > Agents - not via any proxy (registrar) (so called "IP calling"), and
I agree. > that is why UAS part of any SIP phone should listen on well known port > 5060. That is no argument. For direct calls the caller anyway needs to know the IP address of the callee, thus having a fixed port does not gain much comfort. SIP and RTP ports should be dynamic for security reasons. Actually if all SIP user agents would be standard conform then even the proxies need not to use port 5060 (SRV lookups). regards kluas > > Regard, > Chris > > > 2008/8/11 Klaus Darilion <[EMAIL PROTECTED]>: >> IMO every SIP client (not servers) should use a random port as default. This >> is also a security feature - nobody except the registrar need to know the >> port used by the SIP client. >> >> Nevertheless, having an "advanced option" to configure a static port may be >> useful, e.g. for testing purposes. >> >> regards >> klaus > _______________________________________________ > QuteCom-dev mailing list > [email protected] > http://lists.qutecom.org/mailman/listinfo/qutecom-dev _______________________________________________ QuteCom-dev mailing list [email protected] http://lists.qutecom.org/mailman/listinfo/qutecom-dev
