1 00:00:01,430 --> 00:00:07,550 Uh, you can also use if conflict to change your Mac address or, uh, hardware. 2 00:00:08,220 --> 00:00:12,050 Yeah, it is not the same thing here. 3 00:00:12,740 --> 00:00:13,760 There are here like that. 4 00:00:14,150 --> 00:00:21,260 So the Mac address is globally unique, and it's often used as a security measure to keep hackers out 5 00:00:21,260 --> 00:00:23,900 of the network or to trace them. 6 00:00:24,860 --> 00:00:31,970 Uh, changing your Mac address to spoil a different Mac address is almost trivial and neutralizing two 7 00:00:31,970 --> 00:00:33,050 security measures. 8 00:00:33,800 --> 00:00:39,960 It's a very useful technique for bypassing network access controls to spoof your Mac address simply 9 00:00:39,980 --> 00:00:42,560 as the ifconfig here command. 10 00:00:43,160 --> 00:00:44,890 Uh, commands here. 11 00:00:45,440 --> 00:00:52,520 Ifconfig commands down option to make take down the interface 8he zero in this case. 12 00:00:53,000 --> 00:00:57,080 Uh, three zero down here. 13 00:00:57,380 --> 00:01:01,910 Uh, we should use this sort of command and. 14 00:01:03,850 --> 00:01:17,860 Then enter the if conflict commands sudo if config entities zero hardware, he w at her, uh, so then 15 00:01:17,860 --> 00:01:26,590 enter the command so hardly hush w for hardware and ether for Ethernet. 16 00:01:26,590 --> 00:01:33,550 And uh, then this would, uh, enter the new spoofed, uh, Mac address. 17 00:01:34,120 --> 00:01:35,340 Uh, so. 18 00:01:37,970 --> 00:01:46,070 For example, of zero point zero zero zero to one one two two three, three, four four and five five 19 00:01:46,070 --> 00:01:54,230 here and then, uh, find a little bit in the interface back up with the up option for the change to 20 00:01:54,230 --> 00:01:55,350 take the place. 21 00:01:55,370 --> 00:02:00,870 For example, if Palm Beach, um ipconfig. 22 00:02:00,950 --> 00:02:08,980 A. Harsh zero up, uh, we should use bits the whole month or rights. 23 00:02:09,710 --> 00:02:17,840 And now when you check your, uh, new settings with, uh, with ifconfig, you will see your new Mac 24 00:02:17,840 --> 00:02:20,360 address, uh, here. 25 00:02:22,560 --> 00:02:27,360 Uh, actually, what was our old address here? 26 00:02:32,650 --> 00:02:32,960 Yes. 27 00:02:33,460 --> 00:02:39,790 As you can see here, we changed our old internet IP address, netmask broadcast and. 28 00:02:41,480 --> 00:02:44,450 It's not a civil yet, so. 29 00:02:45,360 --> 00:02:52,310 You know, we can assign new IP address from the PRC server. 30 00:02:52,880 --> 00:03:00,830 So Linux Linux has a dynamic host configuration protocol server that runs on Diamon, a process that 31 00:03:00,830 --> 00:03:10,280 runs in the background so called the harsh the ups, harsh the p here. 32 00:03:12,710 --> 00:03:22,010 Order the judge keep them on, so did the DRC server assigns IP address to all the systems on the subnet 33 00:03:22,010 --> 00:03:29,270 and keeps look files of which IP addresses are located to which machine here? 34 00:03:29,840 --> 00:03:30,500 Um. 35 00:03:32,740 --> 00:03:39,850 So usual to connect is interference from a line, you must have a C P CPA sound IP. 36 00:03:40,360 --> 00:03:46,030 So uh, we will uh, the RCP, the C. 37 00:03:47,720 --> 00:03:51,490 The line here, as you can see. 38 00:03:54,090 --> 00:03:59,730 Now, therefore, after setting a static IP on this, you must return to get a new the hard copy, a 39 00:03:59,730 --> 00:04:01,020 sign that IP address. 40 00:04:01,410 --> 00:04:04,230 To do this, you can otherwise reboot your system. 41 00:04:04,930 --> 00:04:11,580 Uh, sorry or here, but I will not reboot work. 42 00:04:12,180 --> 00:04:14,010 And uh, what? 43 00:04:14,010 --> 00:04:21,630 I will show you how to retrieve a new dealership without having to, uh, shut your system down and 44 00:04:21,630 --> 00:04:22,230 restarted. 45 00:04:22,800 --> 00:04:31,950 So to request an IP address from dealership, uh, simply call the DRC server with command the client 46 00:04:32,880 --> 00:04:34,350 followed by the interface. 47 00:04:34,450 --> 00:04:35,370 Yeah, you want to. 48 00:04:36,400 --> 00:04:36,820 The. 49 00:04:37,960 --> 00:04:44,260 Address assigned to so different than obsessive Russians, he was the different RCP clients, but the 50 00:04:44,770 --> 00:04:48,960 is built on a Debien which uses the simple client. 51 00:04:48,970 --> 00:04:52,210 Therefore, you can assign new others like this at zero. 52 00:04:53,620 --> 00:04:56,050 We have to use sort of comment as well here. 53 00:04:59,770 --> 00:05:01,780 As you can see here, we are waiting for it. 54 00:05:08,430 --> 00:05:16,890 So the dealership client, the harsh the harsh client command since the harsh cop in discovery request 55 00:05:16,890 --> 00:05:20,340 from the network interface specified here in the. 56 00:05:22,310 --> 00:05:31,590 Here and a TV zero, of course, in this case, it receives the offer, the RCP offer from the dealership 57 00:05:31,590 --> 00:05:32,210 is server. 58 00:05:33,080 --> 00:05:39,400 And this is the IP address in this case and confirms the IP assignment, uh, to it. 59 00:05:39,410 --> 00:05:45,920 So we have played with our Ethernet addresses and, uh, all of our networks here. 60 00:05:45,920 --> 00:05:47,840 Uh, so I will not try this here. 61 00:05:49,220 --> 00:05:51,950 So let you get the idea, of course. 62 00:05:52,340 --> 00:05:57,830 Uh, so uh, let's manipulate the domain name system here. 63 00:05:59,990 --> 00:06:03,050 Uh, for example, uh, for. 64 00:06:04,960 --> 00:06:13,480 This month, here are some hackers can find a treasure trove of information, um, information on a 65 00:06:13,480 --> 00:06:16,690 target on its domain name system DNS. 66 00:06:17,230 --> 00:06:21,850 So in the U.S. Navy, you will learn domain manipulate. 67 00:06:22,270 --> 00:06:26,350 Uh, you will learn and practically manipulate the domain name system in Linux. 68 00:06:26,590 --> 00:06:28,390 So I'm waiting in the next lecture.