SYN+FIN packets legal?

Roger Espel Llima (espel@llaic.u-clermont1.fr)
Sun, 13 Dec 1998 03:07:30 +0100

xervavi Alan Cox lio linux-kernel:
> SYN|FIN is legal TCP. If you ever see it be suspicious however. The only
> legitimate cause of it is T/TCP which is an experimental protocol nobody
> is supposed to use

FreeBSD used to do T/TCP in a number of cases, including the 'finger'
command. I don't know if they've come back to their senses since...

-- 
Roger Espel Llima, espel@llaic.u-clermont1.fr
http://www.eleves.ens.fr:8080/home/espel/index.html


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