Date: 25 Jul 2003 16:20:37 -0400 From: Lowell Gilbert <freebsd-current-local@be-well.no-ip.com> To: freebsd-current@freebsd.org Subject: Re: "authenticated tftp" Message-ID: <447k66s6i2.fsf@be-well.ilk.org> In-Reply-To: <20030725214646.C89556@news1.macomnet.ru> References: <Pine.NEB.3.96L.1030725132016.31689D-100000@fledge.watson.org> <20030725214646.C89556@news1.macomnet.ru>
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Maxim Konovalov <maxim@macomnet.ru> writes: > On Fri, 25 Jul 2003, 13:22-0400, Robert Watson wrote: > > > > > Yeah, seems like an oxy-moron, but this is a legitimate question, I > > promise. My linksys wireless router requires me to disable the admin > > password on it to tftp a firmware update to it--however, the Windows tftp > > client that Linksys ships appear to support some form of "Oh yeah, and > > here's a password". It probably really doesn't make a difference > > security-wise, but it would be a lot more convenient to update wireless > > routers if our tftp client spoke whatever extension they use to carry the > > password. Does anyone know anything about that protocol extension, or if > > there are existing tweaks to add it to our tftp? (I saw nothing in the > > man page). If there's a pointer to the on-the-write bits, I can always > > stick it in myself, but I have yet to find one. > > There are several tftp extension that NetBSD folk integrated to their > tftpd/tftp recently. IIRC they were > > 2347 TFTP Option Extension. G. Malkin, A. Harkin. May 1998. (Format: > 2348 TFTP Blocksize Option. G. Malkin, A. Harkin. May 1998. (Format: > 2349 TFTP Timeout Interval and Transfer Size Options. G. Malkin, A. > > I know nothing about auth extension yet but the protocol is quite > simple (trivial :-)) and if you get a dump of udp session between the > router and windows tftp client it would be easy incorporate this one. Just to explain further what Maxim is pointing out here: the authentication option, whatever it is, is *not* a standard, unlike the ones he listed.
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