Re: TFTP authentication (trying to upgrade Linksys router firmware)

[Andreas Kahari <ak@freeshell.org>]

On Fri, Sep 12, 2003 at 07:58:24PM +0200, Tamas TEVESZ wrote:
> On Fri, 12 Sep 2003, Andreas Kahari wrote:
> 
>  > I'm trying to upgrade the firmware on my Linksys
>  > router (BEFSR41) but the javascript/HTML on the
>  > http://192.168.1.1/Upgrade.htm page is crappy and won't "do"
>  > anything (using Mozilla-firebird, Opera, links, and lynx).
>  >
>  > I tried to tftp to the router and "put" the file, but of course
>  > it replies with
>  >
>  >     Error code 2: Invalid Password !!
>  >
>  > ... and the tftp client in OpenBSD doesn't support
>  > authentication.
> 
> linksys has changed a bit the tftp protocol; not much, they just
> included some kind of authentication, i forgot what exactly, but try
> this: http://www.volny.cz/oldfrog/tftp/linksys-tftp.tar.bz2
> 
> (i have used _some_ linksys-tftp program with success some time back.
> i cannot swear this was the exact one, but it looks identical enough).

I eyeballed the code and compared it to that of the OpenBSD tftp
client and they were very similar, so I gave it a go.  It seems
to have worked.  Thanks.

-- 
Andreas Kähäri
East Anglia, England