NEC NWA-008869-001 manual Telnet Security, Changing the telnet port number

CHAPTER 6 MANAGEMENT AND MAINTENANCE

TELNET SECURITY

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.

Router # enable − config Enter

Router (config) # telnet − server ip port 2323 Enter

Router (config) #

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 Enter

Router (config) # ip access − list tokyo permit ip src 1.1.1.1/32 dest any Enter

Router (config) # telnet − server ip access − list tokyo Router (config) #

Enter

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