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   comp.protocols.tcp-ip      TCP and IP network protocols.      14,669 messages   

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   Message 13,658 of 14,669   
   Jorgen Grahn to ctwiz   
   Re: Weird network stack problems on serv   
   19 Oct 10 19:43:23   
   
   e4ed299a   
   From: grahn+nntp@snipabacken.se   
      
   On Tue, 2010-10-19, ctwiz wrote:   
   > So, background : fedora (2.6.32.21-168.fc12.x86_64) Server receives   
   > client's syn for about 10-15 seconds before it responds and   
   > acknowledges handshake. Some flags change from client and then it   
   > responds happily. Can anyone shed any light or point to the   
   > appropriate docs, rfcs, etc.   
   >   
   > Tcpdump output:   
   > http://pastebin.com/g43gZd0X   
      
   Which can be summarized like this: a SYN like this is ignored:   
      
      seq 3459677040, win 65535, options   
      [mss 1460,nop,wscale 3,nop,nop,TS val 792743561 ecr 0,sackOK,eol]   
      
   but when the client switches to this, a connection is made:   
      
      seq 3459677040, win 65535, options   
      [mss 1460,sackOK,eol]   
      
   No, I don't have the answer ... but it's easier for others to discuss   
   something they can see directly and quote.   
      
   What does netstat -s say?   
      
   /Jorgen   
      
   --   
     // Jorgen Grahn    O  o   .   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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