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IWETHEY Home / IWETHEY Board / Linux Forum / Re: Tried lowering the MTU?
Post #58,966
by jake123
10/23/02 7:30:03 PM
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New Re: Tried lowering the MTU?
:) I already thought of that. It doesn't help. I dropped it all the way to 512 (!) and the symptom continued.

FWIW, when I try to reach one of those sites, the SYN gets sent and no ACK is ever returned. I pulled a major update on the system, and the situation has improved, but there are still a LOT of sites that won't work. The do work fine with the proxy though... I suspect that it's the ISP. Bell's pretty well known for playing dumb games like that. I'm going to try and talk the people into switching to another DSL provider.
--\n-------------------------------------------------------------------\n* Jack Troughton                            jake at consultron.ca *\n* [link|http://consultron.ca|http://consultron.ca]                   irc://irc.ecomstation.ca *\n* Laval Qu\ufffdbec Canada                   news://news.consultron.ca *\n-------------------------------------------------------------------
Post #58,992
by morganek
10/23/02 10:34:29 PM
Reply
New Did you lower the MTU on the client machines?
With NAT + PPPoE, the MTUs on the internal boxes need to be reduced.

Mike
     Having some real problems with linux NAT box - (jake123) - (14) - Oct. 22, 2002, 11:49:17 PM EDT
         Just a thought... - (ChrisR) - (9) - Oct. 23, 2002, 12:00:46 AM EDT
             Re: Just a thought... - (jake123) - Oct. 23, 2002, 12:08:28 AM EDT
             Never mind... I can get the image - (jake123) - (3) - Oct. 23, 2002, 12:12:16 AM EDT
                 Perhaps it's the dtd? - (ChrisR) - (1) - Oct. 23, 2002, 12:20:16 AM EDT
                     W3.org is one of the offending sites... permanent hang. - (jake123) - Oct. 23, 2002, 12:25:18 AM EDT
                 thats not you I get a zope error on that entry - (boxley) - Oct. 23, 2002, 09:13:16 AM EDT
             It appears that the answer is.... - (jake123) - (3) - Oct. 23, 2002, 05:26:47 AM EDT
                 echo 0 > /proc/sys/net/ipv4/TCP_ECN - (folkert) - (2) - Oct. 23, 2002, 01:29:08 PM EDT
                     Re: echo 0 > /proc/sys/net/ipv4/TCP_ECN - (jake123) - (1) - Oct. 23, 2002, 07:31:45 PM EDT
                         It is for the.... - (folkert) - Oct. 23, 2002, 08:22:39 PM EDT
         Tried lowering the MTU? - (scoenye) - (3) - Oct. 23, 2002, 01:41:15 PM EDT
             Seconded! Good Call -NT - (deSitter) - Oct. 23, 2002, 01:44:44 PM EDT
             Re: Tried lowering the MTU? - (jake123) - (1) - Oct. 23, 2002, 07:30:03 PM EDT
                 Did you lower the MTU on the client machines? - (morganek) - Oct. 23, 2002, 10:34:29 PM EDT

There are plenty of wrong people who just don't rate correction.
37 ms