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Old 10-02-2008, 07:56 PM   #1
DeProgrammer
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Registered: Oct 2008
Location: Illinois
Distribution: Debian
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Strange Internet Issue (*Most* pages won't load)


I posted this at another forum two days ago and have yet to get any replies, so I figured I may as well post it here, too. (Hi!)

Well, I just installed Debian (twice, as I had this problem the first time and thought I might have broken it after the installation), the newest AMD64 release, and no web pages or apt repositories will load except Google (including searches, videos, etc.), one other site I can't tell you about because it's a private chat server on the same internet company as me, and these random sites: ramblestrip.com, blogger.com (apparently hosted by Google), and blogsource.com. traceroute works for the sites that work, but it shows asterisks (timeouts) in some rows when trying to get to the sites that don't work. I tried using Epiphany, lynx, and Iceweasel with the same results. Anyway, all pages load fine on every Windows computer on the network--including the one I installed Linux on. Pinging works for all sites. Removing IPv6 things via Network Manager doesn't help. Typing in MySpace's IP address makes it attempt to redirect to "http://www.myspace.com", which, of course, won't load. Pages that do load do so quickly and correctly, and they're obviously not cached.

Last edited by DeProgrammer; 10-02-2008 at 08:00 PM. Reason: More info.
 
Old 10-02-2008, 09:23 PM   #2
IsharaComix
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That's bizarre. Maybe this is an example of "Treacherous Computing" at work? (hahaha)

Can you visit the site in another OS? Maybe you can try to run a Linux live CD for Fedora or something that isn't derived from Debian and see if it loads in it.

If it doesn't work, then either the new Debian distro you're using is rejecting some sort of security thing in their server, or maybe Google really is going to blacklist Linux-based machines (but not theirs, of course).

I'm a newbie, though... so my advice is useless. XD
 
Old 10-02-2008, 09:25 PM   #3
Matir
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Sounds like an iptables or /etc/resolv.conf issue. Any changes made right before the problems began?
 
Old 10-02-2008, 09:38 PM   #4
DeProgrammer
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Registered: Oct 2008
Location: Illinois
Distribution: Debian
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Quote:
Originally Posted by IsharaComix View Post
That's bizarre. Maybe this is an example of "Treacherous Computing" at work? (hahaha)

Can you visit the site in another OS? Maybe you can try to run a Linux live CD for Fedora or something that isn't derived from Debian and see if it loads in it.

If it doesn't work, then either the new Debian distro you're using is rejecting some sort of security thing in their server, or maybe Google really is going to blacklist Linux-based machines (but not theirs, of course).

I'm a newbie, though... so my advice is useless. XD
You wrote something strange there--"maybe Google really is going to blacklist Linux-based machines..." Google is one of the few sites that did work on it. Also, I did successfully get to other websites via Windows XP which is installed on that same computer. My Damn Small Linux LiveCD won't boot on it (it simply shows two of Tux after being told to boot).

Matir, this was a fresh install. No changes were made before my problem began to occur. I'll have a copy of /etc/resolv.conf (which I screwed with a while ago) posted momentarily.

Quote:
# generated by NetworkManager, do not edit!



nameserver 192.168.0.1
(Yes, 192.168.0.1 is the router. No, there's no proxy. I can't think of any other obvious questions.)

Oh, and here's some extra info that probably won't help.
Quote:
IP address: 192.168.0.6
Subnet mask: 255.127.0.0
MTU: 226735872

Last edited by DeProgrammer; 10-02-2008 at 09:49 PM. Reason: Added data
 
Old 10-03-2008, 02:10 AM   #5
gondo
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Registered: Oct 2008
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Just a long shot, try:
iptables -t mangle -A POSTROUTING -p tcp -m tcp --tcp-flags SYN,RST SYN -j TCPMSS --set-mss 1400
 
Old 10-03-2008, 12:54 PM   #6
DeProgrammer
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Registered: Oct 2008
Location: Illinois
Distribution: Debian
Posts: 5

Original Poster
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A winnar is you!
...I mean, uh... That worked. Thanks a bunch.

(And yeah, my friend told me that I have to set up iptables to use that option upon boot, and I think I handled that correctly.)

Last edited by DeProgrammer; 10-03-2008 at 01:48 PM.
 
Old 12-04-2008, 10:00 AM   #7
tombh
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Registered: Dec 2008
Posts: 1

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I think I have a similar problem (explained here in full). However it's Google that doesn't work and most other sites that do work. The strange thing is that this behaviour only happens on a static IP address, with dhclient there's no problem. It could be to do with the company network my computer's on, though like the poster here, all the other Windows computers don't suffer this problem. At first I suspected it was a DNS problem, but the "host" command seems to return IP addresses instantaneously for Google, but another clue is that the very first part of the page loads, the title and the links to Google Images and so on, but no results. I also get this behaviour quite obviously with Facebook.

So what does iptables do? I tried the above iptables command but to no avail. How can I tell if this is an iptable issue here?

Last edited by tombh; 12-04-2008 at 10:02 AM. Reason: add URL
 
  


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