Socket stuck in CLOSE_WAIT state

Alex Buell (alex.buell@tahallah.demon.co.uk)
Mon, 26 Apr 1999 23:30:22 +0100 (GMT)

There's a DoS attack going around on the net: this particular attack
focuses on IDENT (port 113) and leaves sockets in CLOSE_WAIT state.

Here's an example (from netstat -ntu)

tcp 34 0 194.222.9.116:113 204.60.30.67:1386 CLOSE_WAIT

Seems if there's data in the queue, the socket will never close.
This is on 2.2.6.

Someone else reported the same thing with 2.2.5, he had a socket in
CLOSE_WAIT over 7 days!

Cheers,
Alex 

-- 
"A mind opened by new ideas can never return to its original limits"


http://www.tahallah.demon.co.uk




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