Vonage complains about VoIP-blocking

Wed Feb 16 15:47:13 UTC 2005

On Tue, 15 Feb 2005, Rob Thomas wrote:

>
> Hi, Dan.
>
> ] Why block TFTP at your borders? To keep people from loading new versions of
> ] IOS on your routers? ;)
>
> Funny you should mention that.  :)  We have seen miscreants do exactly
> that.  They will upgrade or downgrade routers to support a feature set
> of their choosing.
>
> A lot of malware uses TFTP to update itself as well.

Didn't nachi setup a tftpd on infected systems and then use tftp to load
itself onto systems it spread to?

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