burstnet + ECN

estel · 08-25-2002, 07:37 AM

(probably related to http://www.linuxquestions.org/questi...threadid=13635)

burstnet.com (the ones that the ads up top belong to) doesn't grok ECN; I'm not a big fan of having to disable ECN just for one single ad, but the constant hanging waiting for burstnet before any other page content shows up is equally annoying, so can someone who knows them contact the burstnet administrators and tell them to fix themselves up (patches and fixes are around for such broken software/hardware)? Thanks. Or else switch to another ad provider

(if you have no clue what I'm talking about: http://www.tux.org/lkml/#s14-2)

jeremy · 08-25-2002, 10:07 AM

I don't seem to have that problem with the ads using 2.4.x, does anybody else?

--jeremy

estel · 08-25-2002, 06:16 PM

Check if you have CONFIG_INET_ECN=y in .config, and that `cat /proc/sys/net/ipv4/tcp_ecn` gives 1.

estel · 08-25-2002, 06:30 PM

A wee demo:

Code:

[root@nova] ~ $> cat /proc/sys/net/ipv4/tcp_ecn 
0
[root@nova] ~ $> telnet www.burstnet.com 80
Trying 212.133.68.62...
Connected to www.burstnet.akadns.net.
Escape character is '^]'.
^]
telnet> close
Connection closed.
[root@nova] ~ $> echo 1 > /proc/sys/net/ipv4/tcp_ecn 
[root@nova] ~ $> telnet www.burstnet.com 80
Trying 212.133.68.62...
telnet: Unable to connect to remote host: Connection timed out
[root@nova] ~ $>

MasterC · 08-26-2002, 01:13 AM

Ya know, at home using Linux, I never have any problems with the ads loading, no slowdown at all. They load last on my page anyway, so I can cruise to wherever I want so I don't notice if it takes longer to load (that and I have DSL).

But at work, on w2k, we don't have Flash installed, so the ads that are flash ads take a lot longer to load (on a T3 line), and will sometimes time the page out giving a "page not available" page. A simple refresh immediately brings up a new page, and is good to go.

Don't know if that helps, but I thought I would toss in my experience to see if that would point to any possibilities.

Cool

estel · 08-26-2002, 02:34 AM

It's not about the format of the ads or the speed of connection

I have DSL too, but the issue is that when ECN is enabled in a 2.4.x kernel (I use 2.4.19), burstnet drops the packets on the floor (probably because it believes they are invalid, but actually they conform to a couple of RFCs, 3168 and 793 according to lkml faq), leading to timeouts.

It makes browsing LQ very very slow since the ads are at the top of the page, and the browser decides to wait out the timeout before displaying any other page content (both netscape 4.7 and mozilla 1.1b do this; I have no other browsers installed to check with).

Therefore, burstnet needs to fix whatever is dropping packets with ECN (since this will affect not just communications with the webserver but any traffic passing through the buggy whatever).

So, does someone who has ECN enabled want to confirm this? ('grep CONFIG_INET_ECN=y /usr/src/linux/.config', and 'cat /proc/sys/net/ipv4/tcp_ecn' should output 1).