I'm trying to disable line aux 0 with the following commands on a AS2511-RJ router:

conf t
line aux 0
 transport input none
 transport output none
 no exec
 exec-timeout 0 1
 no password

Is it the right way and how can I re-enable it if need to?

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    Jan 5, 2021 at 2:55

1 Answer 1


First of all, I had to go look up the part number and it's actually on a part of Cisco's site where they've archived the picture files...

Second you could shorten your config to:

line aux 0
 no exec

And to re-enable the config would be:

line aux 0

Note you can still use the aux line for reverse telnet access to a serial port on another device with no exec configured, so you're only preventing incoming sessions with that command.


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