From: Henrik Nordstrom <hno@marasystems.com>
To: Sven Anders <anders@anduras.de>
Cc: netfilter-devel@lists.netfilter.org
Subject: Re: New API / POM modules to merge.... (was: Unique rule ID?!)
Date: Tue, 9 Nov 2004 20:09:07 +0100 (CET) [thread overview]
Message-ID: <Pine.LNX.4.61.0411092003470.7243@filer.marasystems.com> (raw)
In-Reply-To: <4190E80C.8020106@anduras.de>
On Tue, 9 Nov 2004, Sven Anders wrote:
> | The API is being redesigned in pkttables.
>
> Is there documentation for the new API available?
It is "currently" being designed from what I know. Harald?
> Some question:
>
> ~ 1. "TTL or HOPLIMIT: no, it's dangerous"
>
> ~ Why? Don't use it, if it's dangerous - or does it crash the kernel?
It (TTL) in it's current form violates fundamental aspects of IP, easily
allowing the administrator to "accidently" create configurations which
will crash the network.
In case of the TTL match it should be sufficient to change
if (new_ttl != iph->ttl) {
to
if (new_ttl < iph->ttl) {
and remove the increase option to make it safe, but at the same time you
loose a lot of the powers of this target so it may not be desireable to
make this change..
Regards
Henrik
next prev parent reply other threads:[~2004-11-09 19:09 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20041108134743.217B817BE5@grasshopper.anduras.de>
2004-11-08 20:28 ` Re: Unique rule ID?! Sven Anders
2004-11-08 21:32 ` Henrik Nordstrom
2004-11-09 15:53 ` New API / POM modules to merge.... (was: Unique rule ID?!) Sven Anders
2004-11-09 19:09 ` Henrik Nordstrom [this message]
2004-11-09 21:54 ` New API / POM modules to merge Sven Anders
2004-11-09 23:07 ` Henrik Nordstrom
2004-11-09 23:16 ` Patrick McHardy
2004-11-09 23:27 ` Sven Anders
2004-11-09 23:55 ` Patrick McHardy
2004-11-09 23:46 ` Henrik Nordstrom
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