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[OCLUG-Tech] is this a known exploit?

I'm seeing tcp traffic originating from my server going from the 'Registered' 
ports to the port range of 6660-7000.  I do not see a pattern to the 
destination addresses but there are many.  I run 'netstat' fairly regularly 
and can't recall seeing this before.

I've temporarily blocked outgoing traffic to those ports so they are all in 
the 'SYN_SENT' state.  It does not appear to be causing my known apps to 
suffer??

The server is old - running FC5 with incoming traffic limited to smtp and http 
by a dedicated firewall/router.  The sw is as up-to-date as the FC5 
repositories (ie. outdated)

I've searched google for known vulnerabilities but have not found anything 
that matches what I'm seeing.  Is it just something I've missed all this time 
or a true change/problem?  If it's a problem, I suppose it's time for an 
update to something more recent . . . 

Any ideas / suggestions / help appreciated.

Thanks;

Alex V.
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