From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pascal Hambourg Subject: Re: strange behaviour Date: Mon, 26 Feb 2007 15:53:45 +0100 Message-ID: <45E2F479.7020804@plouf.fr.eu.org> References: <20070226124547.69013.qmail@web36804.mail.mud.yahoo.com> Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: <20070226124547.69013.qmail@web36804.mail.mud.yahoo.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: netfilter-bounces@lists.netfilter.org Errors-To: netfilter-bounces@lists.netfilter.org Content-Type: text/plain; charset="iso-8859-1"; format="flowed" To: netfilter@lists.netfilter.org Hello, angico a =E9crit : > i have a server (a) connected to the internet via eth0/ppp0 (adsl). PPPoE ? > another computer (b) is connected to this server thru eth1, and it=20 > should reach the internet via the server which is its gateway. and so i= t=20 > did!... up to a month ago. > i think nothing's changed. all i did was a re-installing of my gentoo=20 > based system on the server, due to problems on the hard-disk. but=20 > firewall rules (iptables) remain the same. and the netted computer can'= t=20 > reach the internet anymore!=20 > things got exquisite because: > - i ping any site on the internet from (b) and i can see their pongs. Then it can reach the internet. > - irc (msn) also works fine! Then it can reach the internet. > - google's pages load correctly! Then it can reach the internet. > and for my despair i can access , but can't access=20 > !!!! > please, help me! what the hell is wrong with my firewall? I doubt this is a firewall issue. It may be an MTU issue. If pppd uses pppoe from rp-pppoe, does it have an option "-m 1452" or=20 less for pppoe in the pty option ? What happens if you decrease the MTU of computer (b) to 1492 or less ?