Cisco IOS VTY Notes
Cisco IOS VTY Notes
Cisco IOS VTY Notes
Todd(config-line)#transport input ?
all
All protocols
none
No protocols
ssh
TCP/IP SSH protocol
telnet TCP/IP Telnet protocol
Beware of this next line, and make sure you never use it in production b
ecause it s a horrendous
security risk:
Todd(config-line)#transport input all
I recommend using the next line to secure your VTY lines with SSH:
Todd(config-line)#transport input ssh ?
telnet TCP/IP Telnet protocol
<cr>
I actually do use Telnet once in a while when a situation arises that sp
ecifically calls for it. It just
doesn t happen very often. But if you want be able to use SSH or Telnet, her
e s how you do that:
Todd(config-line)#transport input ssh telnet
Know that if you don t use the keyword telnet at the end of the command stri
ng, then only SSH
will work on the device. You can go with either, just so long as you und
erstand that SSH is way
more secure than Telnet.