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c.f. bug 424647
List Archive: gentoo-security
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To: gentoo-security@g.o
From: Willie Wong <wwong@...>
Subject: Re: RE: port knocking
Date: Tue, 4 Oct 2005 17:57:33 -0400
On Tue, Oct 04, 2005 at 04:31:38PM -0400, Dan Gregory wrote:
> >  -A PREROUTING -m ttl --ttl-eq 202 -j ACCEPT
> > 
> > echo 204 > /proc/sys/net/ipv4/ip_default_ttl
> 
> 202 != 204?
> 
> Is this a typo?
> 
Thought so first, but remember that each time a router touches it the
ttl gets decreased. So if the linux routing box it two hops away from
the laptop (which is likely if he has a separate wireless router
dedicated to such use) the difference of two would be the right
solution. :)

W
-- 
"What the hell, he thought, you're only young once, and 
threw himself out of the window. That would at least keep 
the element of surprise on his side." 

- Ford outwitting a Vogon with a rocket launcher by going 
into another certain death situation. 
Sortir en Pantoufles: up 54 days, 58 min
-- 
gentoo-security@g.o mailing list


References:
RE: port knocking
-- morgan allen
Re: RE: port knocking
-- Dan Gregory
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Updated Jun 17, 2009

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