WEBVTT 00:01.430 --> 00:07.550 Uh, you can also use if conflict to change your Mac address or, uh, hardware. 00:08.220 --> 00:12.050 Yeah, it is not the same thing here. 00:12.740 --> 00:13.760 There are here like that. 00:14.150 --> 00:21.260 So the Mac address is globally unique, and it's often used as a security measure to keep hackers out 00:21.260 --> 00:23.900 of the network or to trace them. 00:24.860 --> 00:31.970 Uh, changing your Mac address to spoil a different Mac address is almost trivial and neutralizing two 00:31.970 --> 00:33.050 security measures. 00:33.800 --> 00:39.960 It's a very useful technique for bypassing network access controls to spoof your Mac address simply 00:39.980 --> 00:42.560 as the ifconfig here command. 00:43.160 --> 00:44.890 Uh, commands here. 00:45.440 --> 00:52.520 Ifconfig commands down option to make take down the interface 8he zero in this case. 00:53.000 --> 00:57.080 Uh, three zero down here. 00:57.380 --> 01:01.910 Uh, we should use this sort of command and. 01:03.850 --> 01:17.860 Then enter the if conflict commands sudo if config entities zero hardware, he w at her, uh, so then 01:17.860 --> 01:26.590 enter the command so hardly hush w for hardware and ether for Ethernet. 01:26.590 --> 01:33.550 And uh, then this would, uh, enter the new spoofed, uh, Mac address. 01:34.120 --> 01:35.340 Uh, so. 01:37.970 --> 01:46.070 For example, of zero point zero zero zero to one one two two three, three, four four and five five 01:46.070 --> 01:54.230 here and then, uh, find a little bit in the interface back up with the up option for the change to 01:54.230 --> 01:55.350 take the place. 01:55.370 --> 02:00.870 For example, if Palm Beach, um ipconfig. 02:00.950 --> 02:08.980 A. Harsh zero up, uh, we should use bits the whole month or rights. 02:09.710 --> 02:17.840 And now when you check your, uh, new settings with, uh, with ifconfig, you will see your new Mac 02:17.840 --> 02:20.360 address, uh, here. 02:22.560 --> 02:27.360 Uh, actually, what was our old address here? 02:32.650 --> 02:32.960 Yes. 02:33.460 --> 02:39.790 As you can see here, we changed our old internet IP address, netmask broadcast and. 02:41.480 --> 02:44.450 It's not a civil yet, so. 02:45.360 --> 02:52.310 You know, we can assign new IP address from the PRC server. 02:52.880 --> 03:00.830 So Linux Linux has a dynamic host configuration protocol server that runs on Diamon, a process that 03:00.830 --> 03:10.280 runs in the background so called the harsh the ups, harsh the p here. 03:12.710 --> 03:22.010 Order the judge keep them on, so did the DRC server assigns IP address to all the systems on the subnet 03:22.010 --> 03:29.270 and keeps look files of which IP addresses are located to which machine here? 03:29.840 --> 03:30.500 Um. 03:32.740 --> 03:39.850 So usual to connect is interference from a line, you must have a C P CPA sound IP. 03:40.360 --> 03:46.030 So uh, we will uh, the RCP, the C. 03:47.720 --> 03:51.490 The line here, as you can see. 03:54.090 --> 03:59.730 Now, therefore, after setting a static IP on this, you must return to get a new the hard copy, a 03:59.730 --> 04:01.020 sign that IP address. 04:01.410 --> 04:04.230 To do this, you can otherwise reboot your system. 04:04.930 --> 04:11.580 Uh, sorry or here, but I will not reboot work. 04:12.180 --> 04:14.010 And uh, what? 04:14.010 --> 04:21.630 I will show you how to retrieve a new dealership without having to, uh, shut your system down and 04:21.630 --> 04:22.230 restarted. 04:22.800 --> 04:31.950 So to request an IP address from dealership, uh, simply call the DRC server with command the client 04:32.880 --> 04:34.350 followed by the interface. 04:34.450 --> 04:35.370 Yeah, you want to. 04:36.400 --> 04:36.820 The. 04:37.960 --> 04:44.260 Address assigned to so different than obsessive Russians, he was the different RCP clients, but the 04:44.770 --> 04:48.960 is built on a Debien which uses the simple client. 04:48.970 --> 04:52.210 Therefore, you can assign new others like this at zero. 04:53.620 --> 04:56.050 We have to use sort of comment as well here. 04:59.770 --> 05:01.780 As you can see here, we are waiting for it. 05:08.430 --> 05:16.890 So the dealership client, the harsh the harsh client command since the harsh cop in discovery request 05:16.890 --> 05:20.340 from the network interface specified here in the. 05:22.310 --> 05:31.590 Here and a TV zero, of course, in this case, it receives the offer, the RCP offer from the dealership 05:31.590 --> 05:32.210 is server. 05:33.080 --> 05:39.400 And this is the IP address in this case and confirms the IP assignment, uh, to it. 05:39.410 --> 05:45.920 So we have played with our Ethernet addresses and, uh, all of our networks here. 05:45.920 --> 05:47.840 Uh, so I will not try this here. 05:49.220 --> 05:51.950 So let you get the idea, of course. 05:52.340 --> 05:57.830 Uh, so uh, let's manipulate the domain name system here. 05:59.990 --> 06:03.050 Uh, for example, uh, for. 06:04.960 --> 06:13.480 This month, here are some hackers can find a treasure trove of information, um, information on a 06:13.480 --> 06:16.690 target on its domain name system DNS. 06:17.230 --> 06:21.850 So in the U.S. Navy, you will learn domain manipulate. 06:22.270 --> 06:26.350 Uh, you will learn and practically manipulate the domain name system in Linux. 06:26.590 --> 06:28.390 So I'm waiting in the next lecture.