From: Nick Griffin (nick.jon.griffin@gmail.com)
Date: Tue Jul 01 2008 - 12:13:45 ART
It is used for a telnet back door. The rotary x command will allow you to
telnet to port 3001 on that particular router/device, from the subnets
referenced in your acl 101. In case of a DoS attack, you still have telnet
to the device via port 3001, if port 23 vty's are all used up. When you
specify "rotary x" you basically add 3000 to that number and that's the port
it's listening on.
On Tue, Jul 1, 2008 at 9:46 AM, Marc La Porte <marc.a.laporte@gmail.com>
wrote:
> Hi experts,
>
> Can someone explain to me the concept of a "rotary" on a vty line.
> Why would you use it?
> Why only one line on the rotary?
> etc
>
> Example:
> line vty 4
> rotary 1
> !
> access-list 101 permit tcp 147.151.146.0 0.0.0.255 eq 23
> access-list 101 permit tcp 147.151.0.0 0.0.0.255 eq 3001
> access-list 101 deny ip any any log
> !
> line vty 0 4
> login local
> access-class 101 in
> !
> username cisco password cisco
>
> Thanks
> Marc
>
>
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