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What does the TCP flag NONE mean ?

To: "LinuxVirtualServer.org users mailing list." <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
Subject: What does the TCP flag NONE mean ?
From: Malcolm Turnbull <malcolm@xxxxxxxxxxxxxxxx>
Date: Tue, 26 Apr 2005 20:25:38 +0100

When I make a connection through LVS to a real server and look in the connection table I normally get

TCP 17:24 ESTABLISHED 173.19.13.214:1736 173.19.15.175:80 173.19.12.243:80 And everything including persistence works as expected

But when I connect using a bit of javascript from i.e. (client side) I get :

TCP 17:24 NONE 173.19.13.214:0 173.19.15.175:80 173.19.12.243:80 And the first connection gets a 404 error, further refreshes work fine, and then persistence doesn't seem to work ? Do connections with a status of NONE not get put is the persitence table ?
The javascript is refreshing a page from the server every 1 minuted... and 
while I'm at it if you set the javascript to go every 10mins you get far more 
404 errors.

Obviously I need to do some more investigation, but I was just wondering if 
anyone had some ideas ?

I noticed this post sugested droping all TCP NONE packets as they weren't required ?

http://www.in-addr.de/pipermail/lvs-users/2005-February/013235.html

Thanks,

Malcolm.


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