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These are the user uploaded subtitles that are being translated: 1 00:00:00,840 --> 00:00:05,990 Hi, within this lecture, re going to understand what is ever upside. 2 00:00:06,410 --> 00:00:13,500 Everything to cover some of the terms that you may need to know before you go into the pen testing of 3 00:00:13,500 --> 00:00:15,540 the Web applications and Web sites. 4 00:00:16,200 --> 00:00:20,160 OK, so I'm going to explain all of this terms. 5 00:00:20,190 --> 00:00:25,290 I'm going to explain a couple of bit more so that you will be ready to start this course. 6 00:00:25,740 --> 00:00:32,100 So first of all, Web sites are actually files and folders stored in a computer. 7 00:00:32,340 --> 00:00:39,870 OK, but this computer has access to the Internet so everybody can actually reached his computer and 8 00:00:39,870 --> 00:00:47,780 get the requests that they make in order to see the related pages relate to their applications, why 9 00:00:47,840 --> 00:00:51,000 they were there browsing, for example. 10 00:00:51,660 --> 00:00:57,060 As you can see, there is a router, which is the Malda more router in your home and you have a computer. 11 00:00:57,060 --> 00:00:57,450 Right. 12 00:00:57,900 --> 00:01:04,770 So if you want to go to Google dot com, for example, you make a request and you forward that the request 13 00:01:04,770 --> 00:01:07,530 from your computer to your router. 14 00:01:07,770 --> 00:01:08,220 Right. 15 00:01:08,640 --> 00:01:09,810 And then router. 16 00:01:10,110 --> 00:01:12,630 We'll forward that request to the Internet. 17 00:01:13,170 --> 00:01:17,090 We'll go to that Web sites cohosting. 18 00:01:17,100 --> 00:01:21,360 We'll go to the computer of that Web site is hosted on. 19 00:01:22,020 --> 00:01:29,100 So hosting means that and the IP addresses are very important in this case. 20 00:01:29,310 --> 00:01:34,230 So, first of all, let me tell you all about the IP addresses so you won't get confused. 21 00:01:35,010 --> 00:01:36,150 You don't have to do that. 22 00:01:36,180 --> 00:01:38,190 Just let me do this for you. 23 00:01:38,400 --> 00:01:46,320 If you search for what is my IP in Google, OK, like this, it will show you the public IP that you're 24 00:01:46,320 --> 00:01:48,420 going to have your you have. 25 00:01:49,010 --> 00:01:49,370 OK. 26 00:01:49,680 --> 00:01:52,230 So this is my public IP address. 27 00:01:52,260 --> 00:01:56,640 Of course I'm censoring this so that you won't see mine. 28 00:01:57,030 --> 00:01:57,480 OK. 29 00:01:57,840 --> 00:02:01,520 You shouldn't share your public IP address if you don't see it. 30 00:02:01,540 --> 00:02:04,860 There you can just click one of the links over here to see it. 31 00:02:05,670 --> 00:02:07,300 And again, you don't have to do that. 32 00:02:07,320 --> 00:02:09,360 I'm just doing this for an example. 33 00:02:09,660 --> 00:02:14,550 And this public IP address is same for old computers or devices. 34 00:02:14,560 --> 00:02:17,710 They're connected to your router in your home. 35 00:02:17,940 --> 00:02:21,140 So your phone has the same public IP address. 36 00:02:21,180 --> 00:02:23,580 Your computer has the same public IP address. 37 00:02:23,850 --> 00:02:32,700 But they have different local IP addresses in this one nine two one six eight oh eleven thing represents 38 00:02:32,940 --> 00:02:41,910 one of the examples that we may get this local IP addresses are actually located by the router itself. 39 00:02:42,360 --> 00:02:49,230 And if you have installed your clinics and if you have it's running, you can actually see your public 40 00:02:49,560 --> 00:02:53,550 or local IP address by typing something into terminal. 41 00:02:53,970 --> 00:02:55,290 You don't have to do that again. 42 00:02:55,320 --> 00:02:57,210 I'm just doing this for an example. 43 00:02:58,080 --> 00:03:06,930 Let me just change my keyboard over here and fire on if configure IFCO Ficke, it will show me the configuration 44 00:03:06,930 --> 00:03:09,180 of my interfaces. 45 00:03:09,480 --> 00:03:17,470 And this is my local IP address, which is Tenno two for I'm getting a ten or two X IP address since 46 00:03:17,470 --> 00:03:19,980 we're operating in the net network. 47 00:03:20,260 --> 00:03:27,570 And if you want to see yours in Windows, for example, you can always run IP config in your comment 48 00:03:27,570 --> 00:03:28,020 prompt. 49 00:03:28,230 --> 00:03:29,820 But again, you don't have to do that. 50 00:03:29,850 --> 00:03:35,730 I'm just doing this to demonstrate to you the different kinds of IP addresses. 51 00:03:35,970 --> 00:03:36,320 OK. 52 00:03:36,780 --> 00:03:46,500 So as we have a public IP address, the hosting de computer that hosts this Web site, Google dot com, 53 00:03:46,800 --> 00:03:49,530 has an public IP address as well. 54 00:03:50,040 --> 00:03:58,740 And we actually pinged that IP address or we actually send their request to that IP address and get 55 00:03:58,740 --> 00:04:01,650 a response back to our router. 56 00:04:01,920 --> 00:04:09,230 And we forward that response to the related computer so that they can see what's going on on that Web 57 00:04:09,230 --> 00:04:09,810 site. 58 00:04:10,800 --> 00:04:16,320 It's pretty easy to actually understand an IP address of a website. 59 00:04:16,440 --> 00:04:18,030 I'm going to show you what is this? 60 00:04:18,630 --> 00:04:23,940 And the Domain is actually the name of that Web site like Google dot com. 61 00:04:24,480 --> 00:04:31,680 So hosting is the computer or server that hosts the full files and folders that create the Web site. 62 00:04:31,950 --> 00:04:41,430 Domain is the name of that Web site and DNS is actually the intermediary server like of a new type Google 63 00:04:41,430 --> 00:04:42,150 dot com. 64 00:04:42,450 --> 00:04:47,400 It finds the related IP address and it sends the request to that IP address. 65 00:04:47,760 --> 00:04:55,830 And we find the V actually match the IP address, correct IP address with the correct domain using DNS, 66 00:04:56,010 --> 00:04:58,800 which is domain name servers. 67 00:04:59,180 --> 00:04:59,500 OK. 68 00:04:59,600 --> 00:05:01,550 So domain name servers. 69 00:05:02,030 --> 00:05:10,310 So when we type Google dot com or some other Web sites by using DNS domain name servers, we find his 70 00:05:10,310 --> 00:05:15,080 IP address and be forwarded our requests and get back to responses. 71 00:05:15,440 --> 00:05:21,710 And we see the responses like a Web site in our browser. 72 00:05:22,460 --> 00:05:28,750 And if you open your colonics and just typing Google dot com, it will start to pink Google dot.com 73 00:05:28,820 --> 00:05:32,630 and we will see the IP address of the Google like that. 74 00:05:33,110 --> 00:05:37,370 And you can just closes down by typing controls here on your keyboard. 75 00:05:37,640 --> 00:05:41,420 So this is the public IP address of the Google. 76 00:05:41,660 --> 00:05:49,580 So Google uses this IP address for us to reach their servers and get the responses back. 77 00:05:50,750 --> 00:05:54,990 So that's it's actually that's how websites work. 78 00:05:55,130 --> 00:05:55,700 Right. 79 00:05:56,240 --> 00:06:03,080 And let's we're going to do we're going to try and understand what kind of vulnerabilities or what kind 80 00:06:03,080 --> 00:06:11,630 of secretive flaws are residing in that server or in that hosting show that we can submit those flaws 81 00:06:11,900 --> 00:06:15,170 to the related company and get some bounty's back. 82 00:06:15,590 --> 00:06:15,950 OK. 83 00:06:16,640 --> 00:06:20,600 So this is how an internal and external environment works, of course. 84 00:06:20,630 --> 00:06:25,220 There are a lot of details about this networking operations as well. 85 00:06:25,250 --> 00:06:27,530 But that's all we need to know right now. 86 00:06:27,830 --> 00:06:29,450 You need to know the hosting. 87 00:06:29,450 --> 00:06:33,230 You need to know DNS and you need to know the domain as well. 88 00:06:33,500 --> 00:06:40,040 At least what they mean, because we're going to deal with those things a lot during our course. 89 00:06:40,520 --> 00:06:44,090 So let's stop here and continue within the next one. 8563

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