实验拓扑图：
实验要求：
- PC1可以telnet R1，但不能ping R1；PC1可以ping R2但不能telnet R2；
- PC2和PC1相反
1、配置IP让整个网络互通
[PC1]ip route-static 0.0.0.0 0.0.0.0 192.168.1.254[PC2]ip route-static 0.0.0.0 0.0.0.0 192.168.1.254[R2]ip route-static 192.168.1.0 24 192.168.2.1[PC1]ping 192.168.2.1
PING 192.168.2.1: 56 data bytes, press CTRL_C to break
Reply from 192.168.2.1: bytes=56 Sequence=1 ttl=255 time=50 ms
Reply from 192.168.2.1: bytes=56 Sequence=2 ttl=255 time=50 ms
Reply from 192.168.2.1: bytes=56 Sequence=3 ttl=255 time=50 ms
Reply from 192.168.2.1: bytes=56 Sequence=4 ttl=255 time=50 ms
Reply from 192.168.2.1: bytes=56 Sequence=5 ttl=255 time=70 ms
--- 192.168.2.1 ping statistics ---
5 packet(s) transmitted
5 packet(s) received
0.00% packet loss
round-trip min/avg/max = 50/54/70 ms
[PC1]ping 192.168.1.254
PING 192.168.1.254: 56 data bytes, press CTRL_C to break
Reply from 192.168.1.254: bytes=56 Sequence=1 ttl=255 time=60 ms
Reply from 192.168.1.254: bytes=56 Sequence=2 ttl=255 time=50 ms
Reply from 192.168.1.254: bytes=56 Sequence=3 ttl=255 time=40 ms
Reply from 192.168.1.254: bytes=56 Sequence=4 ttl=255 time=40 ms
Reply from 192.168.1.254: bytes=56 Sequence=5 ttl=255 time=50 ms
--- 192.168.1.254 ping statistics ---
5 packet(s) transmitted
5 packet(s) received
0.00% packet loss
round-trip min/avg/max = 40/48/60 ms
[PC1][PC2]ping 192.168.2.2
PING 192.168.2.2: 56 data bytes, press CTRL_C to break
Reply from 192.168.2.2: bytes=56 Sequence=1 ttl=254 time=150 ms
Reply from 192.168.2.2: bytes=56 Sequence=2 ttl=254 time=40 ms
Reply from 192.168.2.2: bytes=56 Sequence=3 ttl=254 time=50 ms
Reply from 192.168.2.2: bytes=56 Sequence=4 ttl=254 time=40 ms
Reply from 192.168.2.2: bytes=56 Sequence=5 ttl=254 time=60 ms
--- 192.168.2.2 ping statistics ---
5 packet(s) transmitted
5 packet(s) received
0.00% packet loss
round-trip min/avg/max = 40/68/150 ms
[PC2]
<PC2>ping 192.168.1.254
PING 192.168.1.254: 56 data bytes, press CTRL_C to break
Reply from 192.168.1.254: bytes=56 Sequence=1 ttl=255 time=50 ms
Reply from 192.168.1.254: bytes=56 Sequence=2 ttl=255 time=40 ms
Reply from 192.168.1.254: bytes=56 Sequence=3 ttl=255 time=60 ms
Reply from 192.168.1.254: bytes=56 Sequence=4 ttl=255 time=60 ms
Reply from 192.168.1.254: bytes=56 Sequence=5 ttl=255 time=40 ms
--- 192.168.1.254 ping statistics ---
5 packet(s) transmitted
5 packet(s) received
0.00% packet loss
round-trip min/avg/max = 40/50/60 ms
<PC2>在R1上开启telnet服务
[R1]aaa
[R1-aaa]local-user huangfei privilege level 15 password cipher 123456
Info: Add a new user.
[R1-aaa]local-user huangfei service-type telnet
[R1]user-interface vty 0 4
[R1-ui-vty0-4]authentication-mode aaa PC1可以正常telnet R1
<PC1>telnet 192.168.1.254
Press CTRL_] to quit telnet mode
Trying 192.168.1.254 ...
Connected to 192.168.1.254 ...
Login authentication
Username:huangfei
Password:
<R1>q做策略，实现PC1可以telnet R1，但不能ping R1
[R1]acl name nopingr1 3000
[R1-acl-adv-nopingr1]rule deny icmp source 192.168.1.10 0 destination 192.168.1.254 0
[R1-acl-adv-nopingr1]rule deny icmp source 192.168.1.10 0 destination 192.168.2.1 0
[R1-acl-adv-nopingr1]q
[R1]interface GigabitEthernet 0/0/1
#在0/0/1接口的入方向调用策略
[R1-GigabitEthernet0/0/1]traffic-filter inbound acl name nopingr1 检查可以看出无法ping通，但是可以telnet
<PC1>ping 192.168.1.254
PING 192.168.1.254: 56 data bytes, press CTRL_C to break
Request time out
Request time out
Request time out
Request time out
Request time out
--- 192.168.1.254 ping statistics ---
5 packet(s) transmitted
0 packet(s) received
100.00% packet loss
<PC1>ping 192.168.2.1
PING 192.168.2.1: 56 data bytes, press CTRL_C to break
Request time out
Request time out
Request time out
Request time out
Request time out
--- 192.168.2.1 ping statistics ---
5 packet(s) transmitted
0 packet(s) received
100.00% packet loss
<PC1>
<PC1>telnet 192.168.1.254
Press CTRL_] to quit telnet mode
Trying 192.168.1.254 ...
Connected to 192.168.1.254 ...
Login authentication
Username:huangfei
Password:
-----------------------------------------------------------------------------
User last login information:
-----------------------------------------------------------------------------
Access Type: Telnet
IP-Address : 192.168.1.10
Time : 2023-07-20 14:41:53-08:00
-----------------------------------------------------------------------------
<R1>q
Configuration console exit, please retry to log on
The connection was closed by the remote host
<PC1>tel
<PC1>telnet 192.168.2.1
Press CTRL_] to quit telnet mode
Trying 192.168.2.1 ...
Connected to 192.168.2.1 ...
Login authentication
Username:huangfei
Password:
-----------------------------------------------------------------------------
User last login information:
-----------------------------------------------------------------------------
Access Type: Telnet
IP-Address : 192.168.1.10
Time : 2023-07-20 14:44:25-08:00
-----------------------------------------------------------------------------
<R1>PC1可以ping R2，但不能telnet R2
R2开启telnet服务
[R2]aaa
[R2-aaa]local-user huangfei privilege level 15 password cipher 123456
Info: Add a new user.
[R2-aaa]local-user huangfei service-type telnet
[R2-aaa]q
[R2]user-interface vty 0 4
[R2-ui-vty0-4]authentication-mode aaa
[R2-ui-vty0-4]<PC1>telnet 192.168.2.2
Press CTRL_] to quit telnet mode
Trying 192.168.2.2 ...
Connected to 192.168.2.2 ...
Login authentication
Username:huangefi
Password:
Error: Failed to send authen-req.
Logged Fail!
Username:huangfei
Password:
<R2>高级ACL在离源近的路由器上做策略，所以该策略仍然在R1上进行。
[R1]acl name notelnetr2 3001
[R1-acl-adv-notelnetr2]rule deny tcp source 192.168.1.10 0 destination 192.168.2.2 0 destination-port eq 23由于在路由器的一个接口上只能在出入方向各使用一个acl列表，上面我们在R1上的0/0/1接口的入方向上调用了acl nopingr1，所以在删除上一个调用之前，不能再在该接口入方向调用acl列表
[R1-GigabitEthernet0/0/1]traffic-filter inbound acl name notelnetr2
Error: A simplified ACL has been applied in this view.删除之前调用的acl nopingr1列表
[R1-GigabitEthernet0/0/1]undo traffic-filter inbound
重新调用acl notelnetr2列表
[R1-GigabitEthernet0/0/1]traffic-filter inbound acl name notelnetr2
完成策略 PC1可以ping R2，但不能telnet R2
<PC1>ping 192.168.2.2
PING 192.168.2.2: 56 data bytes, press CTRL_C to break
Reply from 192.168.2.2: bytes=56 Sequence=1 ttl=254 time=50 ms
Reply from 192.168.2.2: bytes=56 Sequence=2 ttl=254 time=70 ms
Reply from 192.168.2.2: bytes=56 Sequence=3 ttl=254 time=60 ms
Reply from 192.168.2.2: bytes=56 Sequence=4 ttl=254 time=60 ms
Reply from 192.168.2.2: bytes=56 Sequence=5 ttl=254 time=40 ms
--- 192.168.2.2 ping statistics ---
5 packet(s) transmitted
5 packet(s) received
0.00% packet loss
round-trip min/avg/max = 40/56/70 ms
<PC1>telnet
<PC1>telnet 192.168.2.2
Press CTRL_] to quit telnet mode
Trying 192.168.2.2 ...
Error: Can't connect to the remote host
<PC1>实验完成！！！
