[CentOS] "Treason uncloaked!"

Ross S. W. Walker RWalker at medallion.com
Thu Sep 25 19:57:30 UTC 2008


John R Pierce wrote:
> 
> got a centos5.2 web/database server thats on a public coloc, its dmesg 
> fills up with
> 
> 
> TCP: Treason uncloaked! Peer 82.135.195.32:64905/8032 shrinks window 
> 354477433:354478918. Repaired.
> TCP: Treason uncloaked! Peer 82.135.195.32:64905/8032 shrinks window 
> 354477433:354478918. Repaired.
> TCP: Treason uncloaked! Peer 82.135.195.32:64905/8032 shrinks window 
> 354477433:354478918. Repaired.
> TCP: Treason uncloaked! Peer 84.158.80.177:61931/8032 shrinks window 
> 3243223020:3243237180. Repaired.
> TCP: Treason uncloaked! Peer 84.158.80.177:61931/8032 shrinks window 
> 3243227520:3243237180. Repaired.
> TCP: Treason uncloaked! Peer 84.158.80.177:61931/8032 shrinks window 
> 3243232020:3243237180. Repaired.
> 
> I know thats because of random bogosity coming in from the internet, and 
> I really don't care.   can I suppress that from filling up the dmesg 
> buffer so I can see more important things like scsi soft errors?

You could try turning TCP window scaling off which should stop that
part of the stack from executing.

How much it will affect the network performance of your box depends
on the clients connecting to it...

-Ross

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