Python 3 Programming Tutorial - Threaded port scanner

Key Takeaways

hello everybody and welcome to another socket tutorial video uh this video is going to be kind of building on the last video that we were uh covering and that was a port scanner and actually I want to show you guys the combination of socket and the threading module which we've already covered the threading module um show you another example of threading and action so uh if you don't remember uh this was our threading uh tutorial here and the actual job that was being run was actually just ed. sleep 0.5 so it was just an operation of sleep um but as you can see this is very simple we have a function that's example job period um so in theory we should be able to just throw our P scanner right into example job and that would be it right so uh let me move that aside now and uh we're going to go ahead I think what we'll do is we'll we'll rewrite most of this just so we can go over everything one more time and really rehash uh what we've got going on so obviously we're going to import socket we're also going to import threading and then we're going to say from Q uh import q and then I don't really think we need to import time for any reason so we're not going to import uh time like we did before and now we're ready to go um we're going to use a print lock again so we'll say print lock equals threading do Capital lock and then we're going to say our Target equals again uh pythonprogramming.net and now ready to get started so just like before uh we need our Port scanner so I'm going to Define port scan uh and then the parameters we'll have Port um then uh we're going to say s equals socket. socket and then notet parentheses here socket. aore inet and then soet et. sock stream so again nothing new so far with sockets we've already covered uh what that line means and now we want to engage in a try and accept uh like we had before and so we're going to say try con for connection equals s. connect and then we want to connect to Target comma port in a nice little uh tupal here and so we're going to try to do that and then if that gets successful we're going to run this with statement and we're going to say with print lock uh [Music] print Port uh port is open okay so we do that um and then once we're done with that we're going to say con. close and because we want to close that connection once we're fin finally done um and then accept and then pass so if it doesn't work we're just going to pass we're not going to print out like oh this is uh not open or whatever because then we're just wasting our print statements with this print lock so that's it for our our Port scanner um it should look almost identical to the port scanner that we built in the previous video um so now uh we're going to Define our threader uh which really is going to be an exact copy of the previous threader that we had before so that's going to be wow true and it'll be worker equals q.g get and then port scan worker so not totally identical I suppose because this was like uh example job um port scan worker and then finally q.ask uncore done um just as a rehash this is going to get the worker from the que this is going to run the example job with the worker passing through as the port num so when we we specify a range of numbers as workers um so we can also specify them as ports why not and then when we're all done we say q.ask done to uh empty out their Q awesome so then we'll come down here and we had better defined Q so Q equals q u empty parms and now we're ready to uh create our workers so to speak how many threads are we going to run so for now uh we're going to say uh we're going to have we'll say we'll have 30 30 different workers so for X in range uh 30 so we've got 30 workers uh we're going to say t equals threading do thread Target equals oops threader so what's happening here threading do thread so we're creating a thread and then our Target for that thread is threader which does this gets uh workers from the que so we're using q and threading and uh we'll set them to work on Port scanning uh which is here which we've written again um all this stuff was covered in its own right so far we're just combining those two things so we do we did already cover a specific threading tutorial and we've already covered the port scanner um so sorry if we're moving too fast if we are check out the previous videos uh next t. d demon uh demon equals true uh because we want it to be a demon so it will die when the main thread dies and t. start which has to be called after uh demon now um we don't really need to be logging like we did before so we're not going to use the logging time um now we're going to assign the amount of jobs and so you can think of the amount of jobs as in the amount of ports right so we'll say four worker in range and then this time instead of just 30 or 100 or whatever we need to specify starting point which will be one and then we'll say 1 to 100 and one so we'll test the first 100 ports and the reason why we're doing we have to say one is because Port zero is an invalid Port we can't scan Port zero so anyway moving on um four worker in range one to 100 basically I don't know why it worked so finicky like that but basically it means it will scan Port one up to 101 so it really means Port one to 100 anyway moving along q.p put worker so we're putting that worker to work okay and then what we want to do is uh q. join so that we'll wait until the thread terminates and that really should be it so um hopefully if you walked through the threading tutorial with me you can see how we've basically written the same uh script as we did with our initial threading tutorial where uh the job was just to sleep we've basically replaced that with port scan and that's about it so we've just kind of meshed those together so that's kind of why I wanted to organize the threading tutorial in the way that I did because you just replace the function pretty much with whatever you need to replace it with um so yeah so anyway uh let's go ahead and save save and run this see if I uh made any errors here or if it worked out for us so save and run it's been popping up here yep es coock stream so let's fix that B to make some errors let's try again and immediately we see Port 22 is open does anybody remember how long it took to get Port 22 to show that it was open took a very long time um so that was actually very quick um compared to before we actually showed Port 22 and Port 80 uh well in advance probably we wouldn't even seen it with our original Port scanner yet so anyway that was very quick um then we could continue we could say hey we want to do 10 th000 jobs and we want to have 100 threads let's say um so we can save and run that and you can see 22 and 80 were open we we knew about their their being open immediately and we're going to continue running through ports um adventure to guess there are probably a few more ports that are open um how far did we go 10,000 maybe some in the 9000s will be open um not not quite sure really not sure what number we're on even right now um but we'll see anyway so now we're actually you know we're using 100 threads to port scan so as you can see we can we could use this to our advantage uh threading and be Port scanning you know a lot of ports at at any one time as compared to the really slow port scan before um but anyway um if this pops happens to pop up with some more ports great otherwise I'm going to start concluding this video um so that's it with this video in the next video uh we're going to be moving away from Port scanning I just wanted to show you some people uh Port scanning is kind of a a pretty popular topic and it involves sockets it's very basic so it's really easy to show plus I could mesh it with sockets and threading so I made a really great example for threading so um just wanted to cover those things uh the next ones that we'll be talking about uh we'll be back to more networking purposes sending and receiving data using you know encoding and decoding that data so it works properly so stay tuned for that if you guys have any questions or comments on this I'll feel free to leave them below as always thank you for watching thanks for all the support and subscriptions and until next time no more ports are open