I have investigated deeper. It seems PJISP algorithm works right. it appears Gentoo iptables is realy Symmetric NAT ... How to change to port restricted, recompile kernel and with what options? -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20110527/7150e547/attachment.html>