Re: 7.0 - slow/unstable Internet access via Linux router

On Fri, Feb 29, 2008 at 02:06:38PM +0300, Dmitry Antipov wrote:
recently I've installed 7.0 and now I'm observing strange thing with my
Internet connection.
Access to some sites may be VERY slow or doesn't work at all with different
kinds of timeout
messages or without messages at all (but other sites works fine). For
example, firefox may say
"Transferring data from..." message and then "The connection to the server
was reset while
the page was loading", lynx just says "HTTP/1.1 200 OK" and displays no
data, etc.

Sounds like TCP stack breakage, and not so much an MTU problem.

I read many months ago that some others having this problem solved it by
disabling RFC1323 extensions (default is on), which is a little odd, but
it worked for a couple people. Try doing "sysctl
net.inet.tcp.rfc1323=0" and see if the problem goes away. If it does,
put tcp_extensions="no" in /etc/rc.conf.

I can't reproduce this behaviour, though, on my own setup at home (using
em(4) gigE NICs on the BSD box, and Broadcom BCM47xx 10/100 NICs on the
Linux box (a WRT54GL).

--
| Jeremy Chadwick jdc at parodius.com |
| Parodius Networking http://www.parodius.com/ |
| UNIX Systems Administrator Mountain View, CA, USA |
| Making life hard for others since 1977. PGP: 4BD6C0CB |

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