Messages in this thread |  | | From | Paul Gortmaker <> | Subject | Re: 2.0 ethX bogus packet size messages ... | Date | Sun, 16 Jun 1996 17:21:09 +1000 (EST) |
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> Also note correct oversized packets dumped onto a network break certain > well known vendors 8390 based drivers.
And some 2Mbit WAN links, or so I was told.... B-)
Well, as things stand, with linux-8390 and a too-large MTU, the packets actually *do* hit the wire. (The linux 8390 drivers only moan when Rx'ing them.) I haven't investigated what other linux drivers & NICs do when asked to spit out a giant bogon. They may grenade rather un-gracefully, or simply send the packet as asked, just like the 8390 cards do.
> > Alan, I think the following patch (to use your dev->change_mtu) to keep > > ether users honest, is probably a good idea. > > We could do, but to be honest I dont think we should stop people. Its not > possible to make a computer luserproof. This is something only root can do > and its far less fatal than rm -rf /, which is allowed
True, but "rm -rf /" is like burning your *own* house down, wheras allowing giant packets onto the wire is like sprinkling your whole street with a big box of nails and broken glass.
RFC793 -- "be conservative in what you do, be liberal in what you accept from others." <grin>
Paul.
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