Date: Thu, 9 Aug 2001 17:42:32 +0200 (CEST) From: Luigi Rizzo <luigi@info.iet.unipi.it> To: Jonathan Chen <jon@FreeBSD.ORG> Cc: net@FreeBSD.ORG Subject: Re: forwarding broadcast Message-ID: <200108091542.RAA06984@info.iet.unipi.it> In-Reply-To: <20010809113638.A9519@enterprise.spock.org> from Jonathan Chen at "Aug 9, 2001 11:36:38 am"
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> On FreeBSD -CURRENT and -STABLE, packets to broadcast addresses are not > forwarded. For instance, if I have a FreeBSD router with interfaces I think it is correct NOT to forward local or subnet broadcasts -- it would be evil to let let an external node flood a subnet with broadcast traffic. Plus, a node has no good way (other than guessing) to know what netmask is used on an external subnet. cheers luigi > 192.168.1.1 and 192.168.2.1, and I send packets from 192.168.1.2 to > 192.168.2.255, the packets are dropped to the floor. IMO, this is wrong... > but I haven't consulted all the RFC's so I'm not sure if some standard out > there calls for it. In any case, the following patch creates a sysctl knob > to turn on or off this feature (since it can be considered a security risk > by some). I just want to ask around in case I turned out to be doing > something incredibly evil. Comments? To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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