Hi, I got Pingtel, SipTone hardphones and Windows Messenger softphone to work just fine with the SER 0.8.9 server on the Internet via a Intertex IX66 firewall. I tweaked the SIP phone configurations to use the SER 0.8.10 I installed at home, from the binary RPM obtained from ftp://ftp.berlios.de/pub/ser/0.8.10/packages/redhat/7.x. I ran into some very strange behaviors with SER and the firewall. I disconnected the firewall connection to the Internet and the SIP INVITE transactions stopped involving the firewall. This was evident from analyzing Ethereal captures. (It was if the firewall was in a promiscuous mode of operation an acted upon packets that did not apply to it.) However, I still could not get INVITE transactions to generate 2xx responses for two local phone and SER proxy configured without authentication. So, I tried compiling the source code on my Redhat 7.3 box. Reading specs from /usr/lib/gcc-lib/i386-redhat-linux/2.96/specs gcc version 2.96 20000731 (Red Hat Linux 7.3 2.96-110) . . . Old gcc detected (2.9x), use gcc >= 3.1 for better results make: *** No rule to make target `config'. Stop. My question is should I compile SER with the GCC 2.96 compiler or pay attention to the make config message and update GCC? (Some of the RPM binaries differ from what I compiled with the default RH 7.3 GCC 2.96 compiler.) Sincerely, Scott Holben (skaht(a)iptel.org)