On Wed, 22 Sep 1999, Eric L. Damron wrote:
> I have found that people unknown are attacking my linux box! The following
> entries were found in maillog:
>
> Sep 15 07:09:07 C287853-A sendmail[1979]: NOQUEUE: [157.89.64.77]: VRFY
> guest
> Sep 15 07:09:07 C287853-A sendmail[1980]: NOQUEUE: [157.89.64.77]: VRFY
> decode
> Sep 15 07:09:07 C287853-A sendmail[1981]: NOQUEUE: [157.89.64.77]: VRFY bbs
> Sep 15 07:09:07 C287853-A sendmail[1982]: NOQUEUE: [157.89.64.77]: VRFY lp
> Sep 15 07:09:07 C287853-A sendmail[1983]: NOQUEUE: [157.89.64.77]: VRFY
> uudecode
> Sep 15 07:09:07 C287853-A sendmail[1977]: NOQUEUE: "wiz" command from
> [157.89.64.77] (157.89.64.77)
> Sep 15 07:09:07 C287853-A sendmail[1977]: NOQUEUE: "debug" command from
> [157.89.64.77] (157.89.64.77)
>
> (WHAT THE HELL IS THE "WIZ" COMMAND. AND THE "DEBUG" COMMAND!!
>
> Please! If anyone knows what this jerk is trying to do and How I can stop
> him PLEASE let me know!
>
> Thanks.
>
ipchains -I input -s 157.89.64.77/0 -d 0/0 -j REJECT
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--Axalon