Laborübung WAN - Cisco Agenda

ITTK - WAN - WS2006
Cisco Labor Day 1 (V1.6)
Some Useful Configuration Commands 1
(Do not configure – for explanation purpose only)
To avoid DNS broadcasts for misspelled symbols
Rx(config)# no ip domain-lookup
Note: Cisco router interprets a symbol as placeholder for an IP
address to which a telnet session should be opened and try to
resolve the symbol name via local IP host table or DNS
To allow 20 concurrent telnet sessions on a router and
force checking of local username/password database
Rx(config)# line vty 0 19
Rx(config-line)# login local
Note: Availability of feature depends on IOS version
To allow 20 concurrent telnet sessions on a router and
specify one single password without a request for
specifying a username for all these sessions
Rx(config)# line vty 0 19
Rx(config-line)# login
Rx(config-line)# password
© 2006, D.I. Manfred Lindner Cisco Lab WAN D1, v1.6 13
Some Useful Configuration Commands 2
(Do not configure – for explanation purpose only)
To avoid a telnet session to timeout
Rx(config)# line vty 0 4
Rx(config-line)# exec-timeout 0 0
Note: exec-timeout 30 restores the default of 30
To secure console on a router with password check
Rx(config)# line con 0
Rx(config-line)# login
Rx(config-line)# password
To secure console on a router with username/password
check done with local username/password database
Rx(config)# line con 0
Rx(config-line)# login local
To define a static host name-to-address mapping in the
host cache
Rx(config)# ip host
© 2006, D.I. Manfred Lindner Cisco Lab WAN D1, v1.6 14
© 2006, D.I. Manfred Lindner
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