Hi Nils I tried to use and understand fcp daemon for the past few weeks, but I still have problem for using it. The outbound RTP traffic can pass through NAT/FW without problem, but the inbound one can not. I tried to disable FW, but the problem was still the same. It seems the problem was coming from the NAT part. I checked the debug message from fcpd and I saw message like this one: for origin IP=1694607552 Port=42446-42447 The ports (1122, 1123) shown in the message were actually used by external UA for sending packets. Does the message mean the connections had been reserved successfully for the inbound traffic? If yes, I don't understand why the inbound traffic can not pass through. I also checked the ip_conntrack file, but I only saw the records for the outbound RTP/RTCP traffic. Is that the reason why the inbound traffic can not pass through? or I should check the record from another place? Thanks, Kevin -----Original Message----- From: Nils Ohlmeier [mailto:nils@iptel.org] Sent: Tuesday, August 12, 2003 2:26 PM To: Kevin Chu; SER Users Subject: Re: [Serusers] FCP module in SER On Monday 11 August 2003 17:04, Kevin Chu wrote: Yes it is. You can find the first version as attachment at this mail http://lists.iptel.org/pipermail/serdev/2003-April/000157.html Please contact the author Jaime directly for the latest version. The module for SER is not really the problem. But the FCP server is not wroking really good. Their are some circumstances when the whole setup do not work. So FCP can only be stated as very unstable, and we should/will remove it from the docs. Their is a chance that i will rewrite the FCP daemon, but for that i first need working ctnetlink support from the netfilter guys, which is not available yet. Regards Nils