Date: Thu, 26 Sep 2002 10:07:41 -0700 From: Terry Lambert <tlambert2@mindspring.com> To: soheil h <soheil_h_y@hotmail.com> Cc: freebsd-net@FreeBSD.ORG, freebsd-questions@FreeBSD.ORG Subject: Re: UNKNOWN IP OPTION emergency Message-ID: <3D933EDD.21AEC91E@mindspring.com> References: <F7B7DEEbRQwGF5ucvpW00002b42@hotmail.com>
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soheil h wrote: > as in stevens' Tcp/Ip illustrated says when a router see an unknown option > it must silently ignore it but when i put an option by type 253 len 12 and > 10 byte of data > some router on my path drop it > how can i set an option an put 2 ip address in it that no router delete my > data Send a known option, instead? Ignore := pass | drop Normally, it means "drop", because unknown options are assumed to be hop-to-hop, meaning it's illegal for them to come from a router that did not originate them (i.e. a router that doesn't recognize the option forwarding it to one that does). If you want a covert data channel, you aren't going to be able to do it with router options. 8-). -- Terry To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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