Dear all, I found this command in the HOWTO: iptables -A FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --set-mss 128 It resolve (almost) all my problems with the voip traffic on my linux-based router. The question is: What does it make exactly? It is safe to use it? Thanks for your attention, Luca Andreani _______________________________________________ LARTC mailing list / LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/