Problem accessing some websites
in [Debian]
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From: Guillaume CHARDIN on 25 Nov 2009 14:10 Hi, Three weeks ago I had a debian 4 on my network acting as a gateway with ppp/pppoe. I install from scratch a new debian 5 on this computer last week. Since, I experience problem accessing some websites with a timeout for error, or the browser (firefox or ie) indefinitely load the page and never display it. First i re-install from scratch the debian thinking it could be an installation problem. But problem persist. Then, I do some search on web and different list and I found i could be a MTU related problem, so i try different configuration in my ppp "dsl-provider" file but nothing good happen. I disable iptables on the box and nothing better too. Unfortunately, my adsl modem was destroyed last week and I buy a new one and then the same problem happen. When I use another router or another computer (winXP) to establish the pppoe session it works fine for all websites... Someone have any idea on whats going on ? Thanks for your help -- Guillaume -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org
From: Leandro Quibem Magnabosco on 25 Nov 2009 14:40 Guillaume CHARDIN escreveu: > Hi, > > Three weeks ago I had a debian 4 on my network acting as a gateway > with ppp/pppoe. I install from scratch a new debian 5 on this computer > last week. > Since, I experience problem accessing some websites with a timeout for > error, or the browser (firefox or ie) indefinitely load the page and > never display it. > > First i re-install from scratch the debian thinking it could be an > installation problem. But problem persist. > Then, I do some search on web and different list and I found i could > be a MTU related problem, so i try different configuration in my ppp > "dsl-provider" file but nothing good happen. I disable iptables on the > box and nothing better too. > > Unfortunately, my adsl modem was destroyed last week and I buy a new > one and then the same problem happen. > When I use another router or another computer (winXP) to establish the > pppoe session it works fine for all websites... > > Someone have any idea on whats going on ? > > Thanks for your help > > Maybe DNS? :) Try a different server and let us know. -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org
From: Guillaume CHARDIN on 25 Nov 2009 14:40 2009/11/25 Leandro Quibem Magnabosco <leandro.magnabosco(a)fcdl-sc.org.br>: > Guillaume CHARDIN escreveu: > Maybe DNS? :) > Try a different server and let us know. > DNS resolution works fine on all computers (i can get ip address of all host i ping) i use the dns provided by my ISP. Anyway, i used change them to openDNS one, but still not working. -- Guillaume -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org
From: Alex Samad on 25 Nov 2009 15:20 On Wed, Nov 25, 2009 at 08:03:52PM +0100, Guillaume CHARDIN wrote: > Hi, [snip] > Then, I do some search on web and different list and I found i could > be a MTU related problem, so i try different configuration in my ppp > "dsl-provider" file but nothing good happen. I disable iptables on the > box and nothing better too. It still sounds like a mtu problem, what exactly did you do to fix the mtu problem > > Unfortunately, my adsl modem was destroyed last week and I buy a new > one and then the same problem happen. > When I use another router or another computer (winXP) to establish the > pppoe session it works fine for all websites... so when you browse from the linux computer running pppoe you have problems ? or only when you have a computer behind it. > > Someone have any idea on whats going on ? > > Thanks for your help > -- In 1869 the waffle iron was invented for people who had wrinkled waffles.
From: Guillaume CHARDIN on 25 Nov 2009 15:40 2009/11/25 Alex Samad <alex(a)samad.com.au>: > On Wed, Nov 25, 2009 at 08:03:52PM +0100, Guillaume CHARDIN wrote: >> Hi, > [snip] > so when you browse from the linux computer running pppoe you have > problems ? or only when you have a computer behind it. I don't have any graphical ui on the linux box but a `wget website.domain` is endless. To fix mtu problem, i edit the /etc/ppp/peer/dsl-provider and modify the line : mtu 1492 to mtu 1450 (i tried many value between 1450-1400) the disconnect/reconnect. I tried to set it to another value with the ifconfig command too. And I found on an internal windows station a max mtu size of 1463 (with ping -l 1463 -f) For information, the MTU discovery is set on iptable on the debian gateway : #iptables -t mangle -L [...] Chain FORWARD (policy ACCEPT) target prot opt source destination TCPMSS tcp -- anywhere anywhere tcp flags:SYN,RST/SYN tcpmss match 1400:1536 TCPMSS clamp to PMTU Thanks for your help -- Guillaume -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org
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