The document describes configuring basic SSH access on two routers, R-1 and R-2. It configures interfaces, IP addresses, routing, and SSH settings such as usernames, passwords, and transport input. This allows a client to SSH from its LAN to each router and view routing tables and interface status.

1. Basic SSH Configuration
Prepared By: R. K. Thapa [CCNA Academy Certified, CCNP, MCT, MCSA : 2008 Server Administrator, MCTS, MCITP, MCSE: 2003 Server]
Contact : mr.rupeshthapa@gmail.com,
Task:
This Laptop 0 must be access the R-1 and R-2 using the ssh protocol. Using the Static Default Routing Protocol.
Router>
Router>enable
Router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#
Router(config)#hostname R-1
R-1(config)#interface gi0/0
R-1(config-if)#ip address 192.168.1.1 255.255.255.0
R-1(config-if)#no shutdown
%LINK-5-CHANGED: Interface GigabitEthernet0/0, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0, changed state to up
R-1(config-if)#exit
R-1(config)#interface loopback 0
%LINK-5-CHANGED: Interface Loopback0, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback0, changed state to up
R-1(config-if)#ip address 1.1.1.1 255.255.255.255
R-1(config-if)#no shutdown
R-1(config-if)#exit
R-1(config)#interface serial 0/0/0
R-1(config-if)#clock rate 64000
R-1(config-if)#ip address 12.1.1.1 255.255.255.252
R-1(config-if)#no shutdown
%LINK-5-CHANGED: Interface Serial0/0/0, changed state to down
R-1(config-if)#exit
R-1(config)#ip route 0.0.0.0 0.0.0.0 serial 0/0/0
R-1(config)#exit
R-1#write
Building configuration...
[OK]
R-1#

2. Basic SSH Configuration
Prepared By: R. K. Thapa [CCNA Academy Certified, CCNP, MCT, MCSA : 2008 Server Administrator, MCTS, MCITP, MCSE: 2003 Server]
Contact : mr.rupeshthapa@gmail.com,
Configure the SSH
R-1#conf t
R-1(config)#security passwords min-length 8
R-1(config)#login block-for ?
<1-65535> Time period in seconds
R-1(config)#login block-for 120 ?
attempts Set max number of fail attempts
R-1(config)#login block-for 120 attempts ?
<1-65535> Fail attempts max value
R-1(config)#login block-for 120 attempts 3 ?
within Watch period for fail attempts
R-1(config)#login block-for 120 attempts 3 within ?
<1-65535> Time period in seconds
R-1(config)#login block-for 120 attempts 3 within 60 ?
R-1(config)#login block-for 120 attempts 3 within 60
R-1(config)#line vty 0 4
R-1(config-line)#exec-timeout 10
R-1(config-line)#exit
R-1(config)#ip domain-name cisco.com
R-1(config)#crypto key generate rsa
The name for the keys will be: R-1.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]
R-1(config)#username kcc secret ccna
% Password too short - must be at least 8 characters. Password not configured.
R-1(config)#username kcc secret ccna1234
R-1(config)#enable password class1234
R-1(config)#line vty 0 4
R-1(config-line)#login local
R-1(config-line)#transport input ssh
R-1(config-line)#exit
R-1(config)#exit
R-1#write
Confirm
PC>ipconfig
FastEthernet0 Connection:(default port)
Link-local IPv6 Address.........: FE80::2E0:A3FF:FE3C:724C
IP Address......................: 192.168.1.2
Subnet Mask.....................: 255.255.255.0
Default Gateway.................: 192.168.1.1

3. Basic SSH Configuration
Prepared By: R. K. Thapa [CCNA Academy Certified, CCNP, MCT, MCSA : 2008 Server Administrator, MCTS, MCITP, MCSE: 2003 Server]
Contact : mr.rupeshthapa@gmail.com,
PC>ping 192.168.1.1
Pinging 192.168.1.1 with 32 bytes of data:
Reply from 192.168.1.1: bytes=32 time=0ms TTL=255
Reply from 192.168.1.1: bytes=32 time=0ms TTL=255
Reply from 192.168.1.1: bytes=32 time=0ms TTL=255
Reply from 192.168.1.1: bytes=32 time=0ms TTL=255
Ping statistics for 192.168.1.1:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 0ms, Average = 0ms
PC>ping 1.1.1.1
Pinging 1.1.1.1 with 32 bytes of data:
Reply from 1.1.1.1: bytes=32 time=1ms TTL=255
Reply from 1.1.1.1: bytes=32 time=0ms TTL=255
Reply from 1.1.1.1: bytes=32 time=0ms TTL=255
Reply from 1.1.1.1: bytes=32 time=0ms TTL=255
Ping statistics for 1.1.1.1:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 1ms, Average = 0ms
PC>ssh -l kcc 1.1.1.1
Open
Password: ccna1234
R-1>enable
Password: class1234
R-1#show ip interface brief
Interface IP-Address OK? Method Status Protocol
GigabitEthernet0/0 192.168.1.1 YES manual up up
GigabitEthernet0/1 unassigned YES NVRAM administratively down down
Serial0/0/0 12.1.1.1 YES manual down down
Serial0/0/1 unassigned YES NVRAM administratively down down
Loopback0 1.1.1.1 YES manual up up
Vlan1 unassigned YES NVRAM administratively down down
R-1#show ip route
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
1.0.0.0/32 is subnetted, 1 subnets
C 1.1.1.1/32 is directly connected, Loopback0
192.168.1.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.1.0/24 is directly connected, GigabitEthernet0/0
L 192.168.1.1/32 is directly connected, GigabitEthernet0/0
R-1#

4. Basic SSH Configuration
Prepared By: R. K. Thapa [CCNA Academy Certified, CCNP, MCT, MCSA : 2008 Server Administrator, MCTS, MCITP, MCSE: 2003 Server]
Contact : mr.rupeshthapa@gmail.com,
R-2 Configuration
Router>
Router>enable
Router#configure terminal
Router(config)#hostname R-2
R-2(config)#interface serial 0/0/0
R-2(config-if)#ip address 12.1.1.2 255.255.255.252
R-2(config-if)#no shutdown
R-2(config)#interface loopback 0
R-2(config-if)#ip address 2.2.2.2 255.255.255.255
R-2(config-if)#no shutdown
R-2(config-if)#exit
R-2(config)#ip route 0.0.0.0 0.0.0.0 12.1.1.1
R-2(config)#security passwords min-length 6
R-2(config)#login block-for 120 attempts 3 within 60
R-2(config)#line vty 0 4
R-2(config-line)#exec-timeout 10
R-2(config-line)#exit
R-2(config)#ip domain-name isp.com
R-2(config)#crypto key generate rsa
% You already have RSA keys defined named R-2.cisco.com .
% Do you really want to replace them? [yes/no]: y
The name for the keys will be: R-2.isp.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]
R-2(config)#username isp password ccna1234
R-2(config)#enable password class1234
R-2(config)#line vty 0 4
R-2(config-line)#login local
R-2(config-line)#transport input ssh
R-2(config-line)#exit
R-2(config)#exit
R-2#
R-2#ping 1.1.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 1.1.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/3/13 ms
R-2#ping 192.168.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/7/32 ms

5. Basic SSH Configuration
Prepared By: R. K. Thapa [CCNA Academy Certified, CCNP, MCT, MCSA : 2008 Server Administrator, MCTS, MCITP, MCSE: 2003 Server]
Contact : mr.rupeshthapa@gmail.com,
R-2#ping
Protocol [ip]:
Target IP address: 192.168.1.2
Repeat count [5]: 20
Datagram size [100]:
Timeout in seconds [2]:
Extended commands [n]: y
Source address or interface: 2.2.2.2
Type of service [0]:
Set DF bit in IP header? [no]:
Validate reply data? [no]:
Data pattern [0xABCD]:
Loose, Strict, Record, Timestamp, Verbose[none]:
Sweep range of sizes [n]:
Type escape sequence to abort.
Sending 20, 100-byte ICMP Echos to 192.168.1.2, timeout is 2 seconds:
Packet sent with a source address of 2.2.2.2
!!!!!!!!!!!!!!!!!!!!
Success rate is 100 percent (20/20), round-trip min/avg/max = 1/3/29 ms
R-2#
Confirm
PC>ipconfig
FastEthernet0 Connection:(default port)
Link-local IPv6 Address.........: FE80::2E0:A3FF:FE3C:724C
IP Address......................: 192.168.1.2
Subnet Mask.....................: 255.255.255.0
Default Gateway.................: 192.168.1.1
PC>ping 12.1.1.2
Pinging 12.1.1.2 with 32 bytes of data:
Reply from 12.1.1.2: bytes=32 time=2ms TTL=254
Reply from 12.1.1.2: bytes=32 time=1ms TTL=254
Reply from 12.1.1.2: bytes=32 time=16ms TTL=254
Reply from 12.1.1.2: bytes=32 time=1ms TTL=254
Ping statistics for 12.1.1.2:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 1ms, Maximum = 16ms, Average = 5ms
PC>ping 2.2.2.2
Pinging 2.2.2.2 with 32 bytes of data:
Reply from 2.2.2.2: bytes=32 time=2ms TTL=254
Reply from 2.2.2.2: bytes=32 time=1ms TTL=254
Reply from 2.2.2.2: bytes=32 time=1ms TTL=254
Reply from 2.2.2.2: bytes=32 time=1ms TTL=254
Ping statistics for 2.2.2.2:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),

6. Basic SSH Configuration
Prepared By: R. K. Thapa [CCNA Academy Certified, CCNP, MCT, MCSA : 2008 Server Administrator, MCTS, MCITP, MCSE: 2003 Server]
Contact : mr.rupeshthapa@gmail.com,
Approximate round trip times in milli-seconds:
Minimum = 1ms, Maximum = 2ms, Average = 1ms
PC>ssh -l isp 2.2.2.2
Open
Password: ccna1234
R-2>enable
Password: class1234
R-2#show ip route
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is 12.1.1.1 to network 0.0.0.0
2.0.0.0/32 is subnetted, 1 subnets
C 2.2.2.2/32 is directly connected, Loopback0
12.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 12.1.1.0/30 is directly connected, Serial0/0/0
L 12.1.1.2/32 is directly connected, Serial0/0/0
S* 0.0.0.0/0 [1/0] via 12.1.1.1
R-2#show protocols
Global values:
Internet Protocol routing is enabled
GigabitEthernet0/0 is administratively down, line protocol is down
GigabitEthernet0/1 is administratively down, line protocol is down
Serial0/0/0 is up, line protocol is up
Internet address is 12.1.1.2/30
Serial0/0/1 is administratively down, line protocol is down
Loopback0 is up, line protocol is up
Internet address is 2.2.2.2/32
Vlan1 is administratively down, line protocol is down
R-2# exit
PC>