Just to update the thread that the issue was fixed. It was caused by the TCP MSS setting, fixed by command: iptables -I FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu Thank you all for your help and kindness. On Mar 22, 2014, at 3:19, Nikos Mavrogiannopoulos <nmav at gnutls.org> wrote: > On Fri, 2014-03-21 at 05:43 -0700, RankJie wrote: >> Thanks for the advise. I tried to set mtu=800 but with no luck... > > At least you know now it is not an mtu issue :) I guess then, you should > check the overall networking in the system and find out whether it is a > packet forwarding issue or a firewall issue. > > regards, > Nikos > > >
