Re: "authenticated tftp"

From: Maxim Konovalov (maxim_at_macomnet.ru)
Date: 07/25/03

  • Next message: Wilko Bulte: "Re: 3Com 3C9340 (3C200) support" 
    Date: Fri, 25 Jul 2003 21:53:44 +0400 (MSD)
To: Robert Watson <rwatson@freebsd.org>

    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. 

    -- 
Maxim Konovalov, maxim@macomnet.ru, maxim@FreeBSD.org
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