1 00:00:00,300 --> 00:00:01,460 Welcome back everyone. 2 00:00:01,470 --> 00:00:05,020 And this is the last video to our port scandal project. 3 00:00:05,280 --> 00:00:11,940 Right now what we're going to do is we are going to first of all recap what we did inside of this program. 4 00:00:11,940 --> 00:00:15,870 So we're just going to go through the program code real fast and explain what everything is doing. 5 00:00:15,870 --> 00:00:22,180 Once again and then I will show you how you can use this program and imported inside of another program 6 00:00:22,220 --> 00:00:23,800 so you can use it. 7 00:00:23,810 --> 00:00:24,170 All right. 8 00:00:24,170 --> 00:00:29,150 So first of all let us navigate all the way down to the beginning of the program here. 9 00:00:29,150 --> 00:00:33,250 As you can see we prompt the user to input a target or multiple targets. 10 00:00:33,270 --> 00:00:37,040 We then check whether they specified one target or multiple targets. 11 00:00:37,100 --> 00:00:42,020 If we find comma inside of this variable that means they specified multiple targets. 12 00:00:42,020 --> 00:00:44,540 Therefore we will split all of those targets. 13 00:00:44,540 --> 00:00:50,780 And for each and every IP address inside of this variable we will perform the scanning of that IP address 14 00:00:52,010 --> 00:00:52,940 in any other case. 15 00:00:52,940 --> 00:00:57,200 That means if we didn't find comma that means they only specified one target. 16 00:00:57,200 --> 00:01:03,530 Therefore we are going to perform this scan function onto the targets variable as it is only storing 17 00:01:03,650 --> 00:01:06,130 one IP address or one domain name. 18 00:01:06,190 --> 00:01:07,200 Okay. 19 00:01:07,640 --> 00:01:14,270 Then once we navigate to this can function here we first take the converted IP variable and then we 20 00:01:14,270 --> 00:01:20,650 perform the check IP function onto the specified target if the specified target is simply IP address. 21 00:01:20,720 --> 00:01:26,810 We will return that IP address and it will be stored inside of the converted IP in case the target is 22 00:01:26,810 --> 00:01:28,390 an actual domain name. 23 00:01:28,400 --> 00:01:33,680 Therefore we're going to perform this socket get called by name method which allows us to convert the 24 00:01:33,680 --> 00:01:35,810 domain name into an IP address. 25 00:01:36,590 --> 00:01:37,880 OK. 26 00:01:38,150 --> 00:01:43,160 Right after we convert the IP address we scan for 100 ports. 27 00:01:43,160 --> 00:01:48,700 Now this number keep in mind can be changed for example you can scan for first 500 ports if you'd like. 28 00:01:48,710 --> 00:01:50,430 It doesn't have to be 100. 29 00:01:50,450 --> 00:01:52,890 This is a number that you can change. 30 00:01:52,910 --> 00:01:57,530 Now another thing that you might want to implement in this program if you want is you can also prompted 31 00:01:57,530 --> 00:02:00,770 the user for how many ports they want to scan. 32 00:02:01,130 --> 00:02:06,010 How we will do that but we will simply do that by specifying something like this. 33 00:02:06,110 --> 00:02:10,450 You go to the beginning of the program and there you can simply type port number. 34 00:02:11,180 --> 00:02:14,690 Let's say we call the variable like that and then input 35 00:02:18,220 --> 00:02:28,890 enter number of ports that you want to scan then the user would enter the number of ports. 36 00:02:29,050 --> 00:02:32,570 Let's not leave these two to be capital. 37 00:02:32,620 --> 00:02:33,910 Let's leave it like this. 38 00:02:33,910 --> 00:02:36,430 So enter number of ports that you want to scan. 39 00:02:36,430 --> 00:02:42,870 Then you would take the sexual variable and you will also paste it into the scan function once you do 40 00:02:42,870 --> 00:02:43,270 that. 41 00:02:43,290 --> 00:02:51,740 If you go back to the scan function right here you would simply have something like Port num as a parameter 42 00:02:52,170 --> 00:02:55,860 and then you would have four port in range one through port now. 43 00:02:56,100 --> 00:03:02,940 So it wouldn't have five hundred you would have something like port not so simple as that but we're 44 00:03:02,940 --> 00:03:04,290 not going to leave it like this. 45 00:03:04,290 --> 00:03:06,960 Let's just leave it as the way it was before. 46 00:03:07,590 --> 00:03:12,210 This is just something that you can implement and leave it in the program if you want. 47 00:03:12,210 --> 00:03:17,880 In this case we are not going to use that since it is not necessary we simply just always want to scan 48 00:03:18,210 --> 00:03:22,010 for first 500 ports so we'll delete this 49 00:03:24,780 --> 00:03:30,240 also keep in mind if you leave that option you also need to specify the port number inside of this line 50 00:03:30,240 --> 00:03:35,700 right here and also inside of this line right here as a second parameter to the function. 51 00:03:35,740 --> 00:03:36,080 OK. 52 00:03:36,630 --> 00:03:42,060 So once we get to this for loop we scan for each and every port between the range of 1 and 500. 53 00:03:42,210 --> 00:03:45,370 And we do that by using the scan port function. 54 00:03:45,540 --> 00:03:49,470 So let's go to the scan function and this is the main part of the program. 55 00:03:49,500 --> 00:03:51,120 Here we create the socket object. 56 00:03:51,150 --> 00:03:56,520 We set the timeout so we don't actually waste too much of our time trying to figure out whether a port 57 00:03:56,520 --> 00:03:57,870 is closed the open. 58 00:03:57,870 --> 00:04:03,890 Keep in mind that the accuracy of the scan will depend on the amount of the timer that you set. 59 00:04:03,900 --> 00:04:08,970 The lower the timeout the lesser the accuracy the higher the timeout the bigger the accuracy. 60 00:04:09,570 --> 00:04:09,950 OK. 61 00:04:09,960 --> 00:04:16,350 So then we perform the Connect function onto the target IP address and the port number right after it. 62 00:04:16,380 --> 00:04:22,110 If we manage to connect we will simply just try to get banner and figure out which software is the target 63 00:04:22,110 --> 00:04:27,420 running on that specific open port if we don't manage to get the vendor will simply just print open 64 00:04:27,420 --> 00:04:28,830 port without the banner. 65 00:04:28,830 --> 00:04:34,560 And if we do manage to get it will print open port then the port number and we will attach the banner 66 00:04:34,920 --> 00:04:36,450 right after the two dots. 67 00:04:37,090 --> 00:04:38,220 Okay. 68 00:04:38,280 --> 00:04:43,290 In any other case if we don't manage to connect we will simply just pass and not print anything because 69 00:04:43,290 --> 00:04:46,670 we are not really interested in printing which ports are closed. 70 00:04:46,710 --> 00:04:49,820 We're only interested in printing the open ports. 71 00:04:49,850 --> 00:04:50,180 Okay. 72 00:04:50,280 --> 00:04:55,980 So this is basically the whole idea of this port scanner project and now let's see how we can actually 73 00:04:55,980 --> 00:04:59,810 use this program and imported into another program. 74 00:04:59,820 --> 00:05:00,110 Okay. 75 00:05:00,150 --> 00:05:01,590 So how can we do that. 76 00:05:01,590 --> 00:05:05,100 Well first of all what we need to do is we need to create another file. 77 00:05:05,160 --> 00:05:08,280 So I'm just going to go right click on the port scanner 78 00:05:11,360 --> 00:05:16,680 then go to the new and then python file and let's call this file IP eyepiece. 79 00:05:16,720 --> 00:05:24,650 Can be white it will automatically added right here so you will have two taps one for the port scanner 80 00:05:24,680 --> 00:05:26,420 and one for the IP scan. 81 00:05:26,480 --> 00:05:29,010 And now we want to import this program. 82 00:05:29,030 --> 00:05:33,470 Now one thing before you actually do that is you need to make sure that both of these files are in the 83 00:05:33,470 --> 00:05:34,720 same directory. 84 00:05:34,760 --> 00:05:37,710 In my case they are both in the port scanner project. 85 00:05:37,760 --> 00:05:41,100 Therefore they are in the same directory so I can proceed. 86 00:05:41,510 --> 00:05:45,670 Now the next thing that we need to take a look at is the name of our port scanner. 87 00:05:45,710 --> 00:05:48,350 So it is named port scanner dot P Y. 88 00:05:48,350 --> 00:05:53,360 Now in order to actually import this file into another file in the same directory we simply just type 89 00:05:53,450 --> 00:05:57,560 the command import and then the name of the program that we want to import. 90 00:05:57,590 --> 00:06:04,520 In our case it is port scanner so Let's type it right here for the scanner and you will see that by 91 00:06:04,520 --> 00:06:06,470 charm already recognizes it. 92 00:06:06,500 --> 00:06:12,080 Therefore we successfully managed to import our port scanner program. 93 00:06:12,240 --> 00:06:20,600 Now how can we perform the same task that we did right here just without typing all of this code well 94 00:06:20,660 --> 00:06:27,120 we can simply just call these functions from our second program and use them independently. 95 00:06:27,140 --> 00:06:27,500 Okay. 96 00:06:27,650 --> 00:06:33,910 So the use of this importing is basically if anyone else wants to use our port scanner they can see 97 00:06:33,970 --> 00:06:39,290 we just imported and use the functions from that program into their own program. 98 00:06:39,290 --> 00:06:47,310 So what we going to specify right here first is the IP address to for example B S BHP that Vaughn Webb 99 00:06:47,870 --> 00:06:49,400 dot com. 100 00:06:49,400 --> 00:06:53,000 This is the domain name that we used to test with our port scanner before. 101 00:06:53,300 --> 00:06:54,770 So nothing new right here. 102 00:06:55,010 --> 00:07:00,500 And all we need to do to actually run this port scanner inside of a different program is to call the 103 00:07:00,500 --> 00:07:02,880 scan function. 104 00:07:03,110 --> 00:07:06,960 Now at first you might be asking well why recalling the scan function. 105 00:07:07,010 --> 00:07:12,740 Well basically you will notice that by calling this can function all of the other functions get called 106 00:07:12,830 --> 00:07:13,910 as well. 107 00:07:14,090 --> 00:07:20,510 For example inside with the scan function we first called the check IP function in order to check for 108 00:07:20,510 --> 00:07:21,680 the IP address. 109 00:07:21,680 --> 00:07:27,370 Then we call this can port function which will scan each and every port that we specify inside of these 110 00:07:27,380 --> 00:07:33,560 for loop and inside of the scan port function they get better function gets called in order to print 111 00:07:33,650 --> 00:07:34,520 the banner. 112 00:07:34,520 --> 00:07:37,150 So we didn't need to call specifically all of these functions. 113 00:07:37,160 --> 00:07:40,740 We can simply just call the scan function. 114 00:07:40,900 --> 00:07:41,270 OK. 115 00:07:41,400 --> 00:07:42,690 So how can we do that. 116 00:07:42,720 --> 00:07:47,520 Well in order to call a function from a different program we first of all need to specify the program 117 00:07:47,550 --> 00:07:52,530 name just the same way that you specify a method from a different library for example. 118 00:07:52,650 --> 00:08:00,420 Right here we use socket library and we called a method or a function and we call the function from 119 00:08:00,420 --> 00:08:01,810 that specific library. 120 00:08:01,860 --> 00:08:08,010 But before we had to specify the library name same way goes here we first need to specify ports candor 121 00:08:08,220 --> 00:08:15,160 and then dot and then scan you'll remember that these can function takes one argument which will be 122 00:08:15,160 --> 00:08:23,190 the target as the PI charm already tells us right here and now our target will be the IP address and 123 00:08:23,280 --> 00:08:24,050 believe it or not. 124 00:08:24,060 --> 00:08:30,630 But this is the entire program just by using these three lines we can perform the same thing that we 125 00:08:30,630 --> 00:08:32,360 did inside of all reports. 126 00:08:32,370 --> 00:08:35,310 Can project. 127 00:08:35,320 --> 00:08:37,810 So this is the power of importing libraries. 128 00:08:37,840 --> 00:08:42,760 You can see that anyone who wants to use this can simply just write three lines and they will perform 129 00:08:42,760 --> 00:08:49,030 the same task that we performed by coding the entire port scanner but there is another thing that we 130 00:08:49,030 --> 00:08:52,440 need to take a look at before we actually try to run the IP scan. 131 00:08:52,810 --> 00:08:55,540 You might notice this part right here. 132 00:08:55,630 --> 00:08:58,470 Well we don't really want to run this since. 133 00:08:58,600 --> 00:09:04,450 First of all we're calling this can function already inside of our IP scan program. 134 00:09:04,480 --> 00:09:10,810 Therefore we don't really want to call it twice and we would actually call it because by importing the 135 00:09:10,810 --> 00:09:18,430 ports Canada into our IP scan we're also calling this part of the code importing a library simply means 136 00:09:18,430 --> 00:09:23,650 that we are going to paste the entire port scanner code into our IP scan function. 137 00:09:23,650 --> 00:09:27,120 Therefore this part of the code will also get red. 138 00:09:27,340 --> 00:09:30,970 So how can we make sure that this part of the code doesn't get red. 139 00:09:30,970 --> 00:09:41,460 Well simply we can type if underscore underscore name underscore underscore equals equals and then open 140 00:09:41,490 --> 00:09:49,920 double quotes underscore underscore may underscore underscore if this is equal to Maine then we're going 141 00:09:49,920 --> 00:09:58,750 to run this part of code so let's tap all of these lines in so they belong to this if statement and 142 00:09:58,750 --> 00:10:03,510 now this part of program will only get friend if we run the port scanner. 143 00:10:05,050 --> 00:10:11,170 This line basically means that the actual python will recognize whether this program is being ran as 144 00:10:11,170 --> 00:10:16,690 a main program or it is being imported into a different program and ran from there. 145 00:10:16,690 --> 00:10:22,880 In case it is being important a different program like in this case right here then it will not run. 146 00:10:22,930 --> 00:10:28,660 This part of the code if it is not imported into a different program and if we simply just tried to 147 00:10:28,660 --> 00:10:33,400 run the port scanner itself then this part of the code will actually run. 148 00:10:33,400 --> 00:10:36,990 And that is the meaning of this line right here. 149 00:10:37,020 --> 00:10:42,250 You can simply just remember this as if this is the main program then run this part of the code. 150 00:10:42,280 --> 00:10:42,650 OK. 151 00:10:42,780 --> 00:10:45,600 So right now let's test our IP scandal. 152 00:10:45,660 --> 00:10:54,930 Why let's open the terminal and let's type Python 3 IP scan that be why. 153 00:10:55,960 --> 00:10:57,900 You can see it is scanning the target. 154 00:10:58,060 --> 00:11:04,310 It already found the two ports open and it will scan for first 500 ports as we specified and change 155 00:11:04,310 --> 00:11:06,890 it in number from 100 to 500. 156 00:11:06,910 --> 00:11:10,550 You can see we are also getting some banners from these open ports. 157 00:11:10,570 --> 00:11:16,440 We got open port 106 open port one hundred ten one hundred and forty three. 158 00:11:16,540 --> 00:11:19,050 We can see here is a long banner from that port. 159 00:11:19,060 --> 00:11:20,730 Not really sure what this is. 160 00:11:21,850 --> 00:11:27,040 We also discover another open port which is port four hundred and sixty five and therefore our program 161 00:11:27,040 --> 00:11:29,710 closes as it reached the 500 ports number. 162 00:11:30,370 --> 00:11:32,030 Okay so it actually does work. 163 00:11:32,080 --> 00:11:37,360 Now another thing that you should keep in mind is that you will need to actually code this part of the 164 00:11:37,360 --> 00:11:44,890 code into this IP scan because for example if a user specifies comma and then an IP address this will 165 00:11:44,890 --> 00:11:48,190 not work because we do not have this part. 166 00:11:48,190 --> 00:11:49,900 And this if statement right here. 167 00:11:50,470 --> 00:11:55,360 Therefore it will not be able to scan because of this comma right here. 168 00:11:55,360 --> 00:12:01,060 So if you want to be able to scan multiple targets from your IP scan program make sure that you implement 169 00:12:01,120 --> 00:12:04,550 this if statement into the IP scan. 170 00:12:04,900 --> 00:12:07,000 But we are not going to do that at the moment. 171 00:12:07,000 --> 00:12:08,020 There is no need for that. 172 00:12:08,020 --> 00:12:12,540 We already did that in the port scanner program and I will leave that up to you. 173 00:12:12,650 --> 00:12:12,990 Okay. 174 00:12:13,090 --> 00:12:19,390 So with this we actually finish our first project which will be the port scanner and in the next project 175 00:12:19,420 --> 00:12:24,700 We're going to take a look at how we can create the vulnerability scanner which will be based on this 176 00:12:24,700 --> 00:12:26,650 port scandal that we just created. 177 00:12:26,680 --> 00:12:30,330 So make sure not to delete this program as we are going to need it. 178 00:12:30,370 --> 00:12:36,150 You also know that you will have all of these actual programs in the resources at the end of each project. 179 00:12:36,200 --> 00:12:36,510 Okay. 180 00:12:36,550 --> 00:12:40,380 So you can simply just download them if you don't want to code. 181 00:12:40,510 --> 00:12:45,630 I hope you enjoyed this lecture and I will see you in the vulnerability scanner project. 182 00:12:45,630 --> 00:12:46,150 Take care. 183 00:12:46,150 --> 00:12:46,720 And by.