From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Rob Verduijn" Subject: RE: rp-l2tpd iptables and rh9 but no google Date: Mon, 28 Jul 2003 22:18:31 +0200 Sender: netfilter-admin@lists.netfilter.org Message-ID: References: <1058557759.16546.2.camel@porky> Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: <1058557759.16546.2.camel@porky> Errors-To: netfilter-admin@lists.netfilter.org List-Help: List-Post: List-Subscribe: , List-Id: List-Unsubscribe: , List-Archive: Content-Type: text/plain; charset="iso-8859-1" To: netfilter@lists.netfilter.org Hi again, I've set my MTU on eth0 eth1 and ppp0 to 1472 Ive been playing around with tcpdump I gave the following command tcpdump -i ppp0 -w dumptcp When I surf to www.redhat.com everything goes wel and I get all kinda out= put in my file But when I surf to google I get nothing, no output whatsoever. Did I give in the wrong syntax? Regards Rob -----Original Message----- From: netfilter-admin@lists.netfilter.org [mailto:netfilter-admin@lists.netfilter.org]On Behalf Of Eric Leblond Sent: vrijdag 18 juli 2003 21:49 To: netfilter@lists.netfilter.org Subject: Re: rp-l2tpd iptables and rh9 but no google Le ven 18/07/2003 =E0 21:01, Rob Verduijn a =E9crit : > Hi there, > > I've got this curious problem with netfilter. > I did > echo 1 > /proc/sys/net/ipv4/ip_forward > > I can ping google so icmp seems to work but I can't surf the web for google. > Neither windows nor linux will work. You may have look to the MTU, with encapsulation in L2TP you loose some bytes. To test try increase your ping size with the -s option. If it is working with -s 1500 then try to look at tcpmss. BR, -- Eric Leblond