PF, bridge, states and window scaling problem

Girish Venkatachalam girishvenkatachalam at
Tue Nov 13 06:23:48 PST 2007

On 18:57:34 Nov 13, Girish Venkatachalam wrote:
> I just read the post you linked. Thanks. :)

I read the post once again and it looks as though I understood what is
mentioned there.

The 'no-df' in scrub rule clears the Don't fragment bit in the IP
header. When a host wrongly sends fragmented packets with the DF bit
set, this scrub rule "correctly" resets the DF bit.

Now since the host made the mistake of sending a fragmented packet with
DF bit set ( this is like saying " Please don't fragment my packet, but
I myself have fragmented". Odd...) no-df scrub rule causes trouble.

Scrub never causes trouble with properly formed packets.


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