Hi, I have a linux router: INTERNET<--- eth0 LINUX router eth1 --> LAN ---> host1 ---> host2 ---> ... ---> VoIP device. Linux router haves: - kernel 2.4.20, - iptables 1.2.8 - patchs h323 netfilter - other patchs. I want to connect to a with my VoIP device, to a friend that haves ADSL connection, and VoIP device. Him can to connect to other users with ADSL and VoIP, but not with me. My linux haves severals publics IPs over eth0. One of them are full forwarded to VoIP devide: iptbles -A PREROUTING -t nat -s aa.aa.aa.aa -j DNAT --to-destination bb.bb.bb.bb iptables -A POSTROUTING -t nat -s bb.bb.bb.bb -j SNAT --to-source aa.aa.aa.aa where aa.aa.aa.aa = public ip publica linux router dedicated to VoIP device and bb.bb.bb.bb = VoIP privete ip inside LAN VoIP device can be pinged from internet but I can to connect with my friend that haves her voip device with ADSL connection. which is the problem ? thankyou ! mac _______________________________________________ LARTC mailing list / LARTC@xxxxxxxxxxxxxxx http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/