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Date:      Tue, 07 Jul 1998 12:20:49 -0700
From:      David Greenman <dg@root.com>
To:        rotel@indigo.ie
Cc:        Samuel S Thomas <sthomas@lart.net>, Poul-Henning Kamp <phk@critter.freebsd.dk>, freebsd-bugs@FreeBSD.ORG
Subject:   Re: kern/7191: FreeBSD 2.2.6 generates Source-route prohibited when not routing 
Message-ID:  <199807071920.MAA01531@implode.root.com>
In-Reply-To: Your message of "Tue, 07 Jul 1998 19:55:33 -0000." <199807071855.TAA03556@indigo.ie> 

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>Does this patch mean that if a machine receives a source routed
>packet which is destined for it then it will be silently dropped
>if source routing is disabled?

   No, that is handled by code before this which sends the appropriate ICMP
message to the peer.

>Shouldn't we log such occurences?

   I actually think logging stuff like this on a host is a waste since
legitimate utilities like traceroute can generate LSR packets. Logging
this actually makes one vulnerable to syslogd attacks by simply sending
a flood of LSR packets to the host. If people really want to log these
sorts of failures then they should configure their firewall appropriately.

-DG

David Greenman
Co-founder/Principal Architect, The FreeBSD Project

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