Maybe a NAT issue

[Rankjie]

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
> 
> 
>