1 00:00:00,708 --> 00:00:06,081 In the previous video, we have done configuring port security on the switch 1. 2 00:00:06,876 --> 00:00:10,880 Next in this video, we are going to do testing. 3 00:00:12,066 --> 00:00:17,483 So first, let’s configure an ip address for all server and pc. 4 00:00:19,139 --> 00:00:30,160 Here let’s say the ip address is 192.168.1.1, in this case, we don’t need a gateway, because all of this computer will 5 00:00:30,160 --> 00:00:37,629 be in the same block subnet, remember that we need a gateway if we want to communicate with 6 00:00:37,629 --> 00:00:44,752 others computer in the different block subnet. So in this case, we don’t need a gateway. 7 00:00:45,782 --> 00:00:49,789 Next, let’s configure the ip address for server 2. 8 00:00:50,867 --> 00:01:01,694 Desktop, ip configuration, and the ip address is 192.168.1.2. Next server 3, 9 00:01:03,378 --> 00:01:16,817 the ip address is 192.168.1.3, and last for the pc, the ip address is 192.168.1.4. 10 00:01:17,869 --> 00:01:22,349 And here for the hacker computer, let’s change the name, 11 00:01:27,949 --> 00:01:32,541 and the ip address is 192.168.1.5. 12 00:01:33,255 --> 00:01:41,516 Now let’s test the communication between all server and pc. Server 1 to pc, 13 00:01:41,760 --> 00:01:49,767 success, server2 to the pc, success, and server3 to pc, 14 00:01:49,902 --> 00:01:57,000 this is also success. So now communication between all server and pc is ok. 15 00:01:58,124 --> 00:02:07,034 Now let’s test the port security on fa0/1, we can unplug the cable from server1, 16 00:02:08,433 --> 00:02:17,036 and then connecting the cable to the hacker. Now let’s try to send packet from hacker, 17 00:02:21,371 --> 00:02:29,440 okay here we can see that now the interface is red, this is means that the interface is shutdown. 18 00:02:30,044 --> 00:02:38,143 Let’s check in the switch, do show port-security interface fa0/1, 19 00:02:40,193 --> 00:02:45,000 here we can see that now the status is secure shutdown, 20 00:02:46,189 --> 00:02:49,532 Okay now let’s say we know about the hacker, 21 00:02:49,750 --> 00:02:55,803 so we run to the data center and plug the cable back to the server. 22 00:02:58,375 --> 00:03:04,920 Okay here the problem is the interface is still shutdown even we already plug the 23 00:03:04,920 --> 00:03:11,785 cable back to the server 1. The question is, how we can enable this interface? 24 00:03:12,382 --> 00:03:20,501 Let’s try it, go to interface fa0/1, let’s try no shutdown. 25 00:03:23,229 --> 00:03:29,334 Here we can see that the interface is still shutdown. The light is still red. 26 00:03:29,869 --> 00:03:34,614 So we can not enable the interface using command no shutdown. 27 00:03:35,309 --> 00:03:42,469 Let’s try again, no shutdown, here the interface is still shutdown. 28 00:03:43,444 --> 00:03:45,492 So what is the right command? 29 00:03:46,157 --> 00:03:53,520 To enable the interface shutdown by port security like this, we need to use shutdown command first, 30 00:03:55,433 --> 00:03:56,925 and then no shutdown. 31 00:04:00,000 --> 00:04:03,636 Okay here we can see that now the interface is up. 32 00:04:04,189 --> 00:04:10,112 So remember, we need to shutdown the interface first, and then no shutdown. 33 00:04:10,935 --> 00:04:18,532 Now let’s check again, do show port-security interface fa0/1, 34 00:04:20,807 --> 00:04:28,406 here we can see that now the status is secure up. So now server 1 is up again. 35 00:04:29,400 --> 00:04:31,544 I think enough for this video 36 00:04:31,751 --> 00:04:35,079 Thankyou for watching and see you on the next video