In this tutorial we will learn how to configure router as a terminal server or an access server.Here in below diagram Router0 is working as a terminal server or you can say an access server.
So what this actually mean?
It means if a client seating on PC0 will try to login to router r1, r2,r3,r4 or r5 he/she cannot be able to access these routers directly,he/she must have to go through Router0 which is an access server.
Now i am going to start configuring Access-Server:
Router>enable
Router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#host ACCESS-SERVER
ACCESS-SERVER(config)#int fa0/0
ACCESS-SERVER(config-if)#ip add 1.0.0.254 255.0.0.0
ACCESS-SERVER(config-if)#no shutdown
ACCESS-SERVER(config)#ip domain-name cisco.com
ACCESS-SERVER(config)#crypto key generate rsa
The name for the keys will be: ACCESS-SERVER.cisco.com
Choose the size of the key modulus in the range of 360 to 2048 for your
General Purpose Keys. Choosing a key modulus greater than 512 may take
a few minutes.
How many bits in the modulus [512]: 1024
% Generating 1024 bit RSA keys, keys will be non-exportable…[OK]
ACCESS-SERVER(config)#ip ssh version 2
*Mar 1 0:5:21.334: %SSH-5-ENABLED: SSH 1.99 has been enabled
ACCESS-SERVER(config)#username satish pr 15 password cisco
ACCESS-SERVER(config)#line vty 0 4
ACCESS-SERVER(config-line)#login local
ACCESS-SERVER(config-line)#transport input ssh
ACCESS-SERVER(config-line)#exit
Now after configuring access server its time to Troubleshoot:
ACCESS-SERVER(config)#do show line
Tty Line Typ Tx/Rx A Roty AccO AccI Uses Noise Overruns Int
* 0 0 CTY – – – – 0 0 0/0 –
1 1 AUX 9600/9600 – – – – 0 0 0/0 –
0/0/0 2 TTY 9600/9600 – – – – 0 0 0/0 –
0/0/1 3 TTY 9600/9600 – – – – 0 0 0/0 –
0/0/2 4 TTY 9600/9600 – – – – 0 0 0/0 –
0/0/3 5 TTY 9600/9600 – – – – 0 0 0/0 –
0/0/4 6 TTY 9600/9600 – – – – 0 0 0/0 –
0/0/5 7 TTY 9600/9600 – – – – 0 0 0/0 –
0/0/6 8 TTY 9600/9600 – – – – 0 0 0/0 –
0/0/7 9 TTY 9600/9600 – – – – 0 0 0/0 –
194 194 VTY – – – – 0 0 0/0 –
195 195 VTY – – – – 0 0 0/0 –
196 196 VTY – – – – 0 0 0/0 –
197 197 VTY – – – – 0 0 0/0 –
198 198 VTY – – – – 0 0 0/0 –
Line(s) not in async mode -or- with no hardware support:
10-193
Now again go to ACCESS SERVER or TERMINAL SERVER ROUTER:
ACCESS-SERVER(config)#line tty 2 4
ACCESS-SERVER(config-line)#login local
ACCESS-SERVER(config-line)#transport input ssh
ACCESS-SERVER(config-line)#exit
Now go to pc and from pc login to ACCESS-SERVER or TERMINAL-SERVER ROUTER using SSH.
pc>ipconfig
pc>ssh -l satish 1.0.0.254
ACCESS-SERVER#
Now you can see you have successfully loged in to ACCESS_SERVER ROUTER.
Now FROM ACCESS-SERVER ROUTER We will login to Other routers r1,r2,r3 0r r4.See How..
ACCESS-SERVER#ssh -l satish:2 1.0.0.254
Explanation of above command: Now you can see above command will take you too router r1.
To logout from r1 router go terminal router and type below comand
ACCESS-SERVER#clear line tty 2
[confirm]
[OK]
ACCESS-SERVER#
really nice and helpful topic
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article plus combination of video makes it easy to understand..thanx !
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