Re: Recent Increase in Port 139 Activity

From: H C (keydet89at_private)
Date: Sun Sep 09 2001 - 13:07:07 PDT

  • Next message: Erik Fichtner: "Pretty stealthy SSH scanning seen on the Internet."

    John,
    
    > In the last week, I've started seeing one to several
    > port sweeps per day on
    > port 139, of a particular nature.  
    
    First off, I'm not sure how the traffic you describe
    is "particular" in nature...could you elaborate? 
    After all, your firewall drops it...right?
    
    Second, I'd be very interested to see what happens if
    you can get some packet data.  Generally, the SYN
    packet won't have any data of interest...you'd have to
    let the handshake complete, and then see what data is
    sent to the host.  Perhaps if you opened a hole to a
    single machine on port 139, but to a Linux box...with
    nothing running on that port except a generic
    listener.  That way, the handshake would be completed,
    and we'd be able to see what data would be sent once
    that's done.
    
    At the very least, we'd be able to see what it is, and
    maybe put an end to the speculation about this worm or
    that worm... 
     
    
    
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