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CHAPTER 6 MANAGEMENT AND MAINTENANCE
– 151 –
NWA-008869-001 Rev.1.0
atch6001.fm
TELNET SECURITY
The telnet-server ip enable or telnet-server ipv6 command permits all hosts connected to the In-Skin Rout-
er to establish a connection. You can increase the security of telnet in two ways:
(1) Change the telnet port number
(2) Permit only a specific host to gain access with telnet
Changing the telnet port number
In this example, the port number 2323 is set.
Permitting only a specific host to gain access with telnet
In this example, only the source address “1.1.1.1/32” is permitted to gain access. “tokyo” is set as an access
list name.
Router # enable − config
Router (config) # telnet − server ip port 2323
Router (config) #
Enter
Enter
Router # enable − config
Router (config) # ip access − list tokyo permit ip src 1.1.1.1/32 dest any
Router (config) # telnet − server ip access − list tokyo
Router (config) #
Enter
Enter
Enter
TELNET SECURITY