Cannot connect to router/server/proxy with bad TCP Wscale implementation
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Debian) |
Fix Released
|
Unknown
|
|||
linux (Ubuntu) |
Won't Fix
|
Undecided
|
Unassigned | ||
linux-source-2.6.20 (Ubuntu) |
Won't Fix
|
Medium
|
Unassigned | ||
linux-source-2.6.22 (Ubuntu) |
Won't Fix
|
Undecided
|
Unassigned |
Bug Description
From some particular web servers, a machine running feisty cannot get an HTTP response. However, machines running most other OSs can get an HTTP response. (However, the problem appears to affect Debian etch also.)
How to reproduce the problem:
Use wget or any web browser to try to retrieve the file from this URL:
http://
The client resolves the host, establishes a connection, and sends an HTTP request. However, it receives no response. However, a client on other OSs besides feisty will receive a response. In fact, a machine running dapper can get an HTTP response just fine.
Here is the output from wget:
*****begin transcript*****
ubuntu@ubuntu:~$ wget -d http://
DEBUG output created by Wget 1.10.2 on linux-gnu.
--08:32:45-- http://
=> `online.html'
Resolving www.ureg.
Caching www.ureg.
Connecting to www.ureg.
Created socket 3.
Releasing 0x08093848 (new refcount 1).
---request begin---
GET /ourweb/online.html HTTP/1.0
User-Agent: Wget/1.10.2
Accept: */*
Host: www.ureg.
Connection: Keep-Alive
---request end---
HTTP request sent, awaiting response... Read error (Connection reset by peer) in headers.
Closed fd 3
*****end transcript*****
Now here is the output from a machine running Debian sarge:
******begin transcript*****
[sarge machine]$ wget -d http://
DEBUG output created by Wget 1.9.1 on linux-gnu.
--21:41:41-- http://
=> `online.html'
Resolving www.ureg.
Caching www.ureg.
Connecting to www.ureg.
Created socket 3.
Releasing 0x80a60d0 (new refcount 1).
---request begin---
GET /ourweb/online.html HTTP/1.0
User-Agent: Wget/1.9.1
Host: www.ureg.
Accept: */*
Connection: Keep-Alive
---request end---
HTTP request sent, awaiting response... HTTP/1.1 200 OK
Content-Length: 17686
Content-Type: text/html
Last-Modified: Fri, 15 Sep 2006 12:22:14 GMT
Accept-Ranges: bytes
ETag: "3938fd93c1d8c6
Server: Microsoft-IIS/6.0
X-Powered-By: ASP.NET
Date: Thu, 01 Mar 2007 02:41:40 GMT
Connection: keep-alive
Length: 17,686 [text/html]
100%[==
21:41:41 (105.28 KB/s) - `online.html' saved [17686/17686]
*****end transcript*****
(Incidentally, the site in question is of some importance since it is used by tens of thousands of students at a major public university.)
ProblemType: Bug
Date: Fri Mar 2 08:25:43 2007
DistroRelease: Ubuntu 7.04
Uname: Linux ubuntu 2.6.20-8-generic #2 SMP Tue Feb 13 05:18:42 UTC 2007 i686 GNU/Linux
description: | updated |
Changed in linux-source-2.6.20: | |
assignee: | nobody → ubuntu-kernel-team |
importance: | Undecided → Medium |
status: | Confirmed → Triaged |
Changed in linux-source-2.6.22: | |
assignee: | nobody → ubuntu-kernel-team |
Changed in linux: | |
status: | Unknown → New |
Changed in linux (Debian): | |
status: | New → Fix Released |
Not an Ubuntu bug though.
Broken router and tcp_windows_scaling on
Don't know why it works with dapper, tcp_windows_scaling should be on too.