How to create a vpn application with C# .NET

what's up guys Shane TV here and today I'd like to show you how to create your own VPN application everything in this tutorial is completely free and I will provide all the download links in the description below I'd like to cover four things this tutorial the first one being coding our actual VPN application secondly creating our VPN server that we're going to connect to I'm using digitalocean just because they provide your first 30 days they provide like a 30 day trial you guys can use I'll leave a link for that in the description you guys can use it as well number three configuring our VPN server for both so that we can connect with UDP if we want to or if we want to connect with TCP we can do that as well and finally accessing restricted content with the VPN that we're going to make today I'm going to show you guys a YouTube video that's blocked in my country we're going to access it with this VPN that we're about to make the tools that you guys are going to need is putty FileZilla and the community edition version of Open VPN I'll leave a link for that in case you don't know what that is everything was going to be in the description all the download links so now that we got that out of the way let's go ahead and open visual studio make sure you guys run it as an administrator and go down to create a new projects here you can scroll down until you see Windows forms at net framework hit next project name let's just call it VPN and create now that we have loaded that up you'll see a blank form in the bottom right in the properties box we can just name this form 1 VPN and you can see it changed up there to VPN next open the toolbox search for combo box search again for button double click that twice we need two buttons and then right underneath it the radio button we're going to need two radio buttons close the toolbox I've got both our buttons both our radio buttons and our combo box so let's start with radio button one let's call that UDP let's click on radio button two and call that TCP I'm going to bring it line it up a little bit let's call it the button one connect and call button to disconnect so now we've got a connect button make it a little bit bigger and we've got a disconnect button that all looks good line it up a little bit if you click on the background of the form you can actually resize it I'm gonna make it just about that that looks fine you can start the program and see how it looks make it a little bit bigger actually and that's perfect so click on the combo box and at the top you're going to see an arrow like a black arrow click on that and hit edit items in here we're gonna name our server we'll just call it server and also in the properties box we can scroll down and so it says text and let's just type select your server so if we go ahead and run that again you'll see it says select your server server that's our server name and we can connect with UDP or we can connect with TCP now we also have a disconnect button so to get started on this let's double click the connect button and you see it's creates a private void button underscore click go up to the top here delete all these extra system namespaces and I'm just going to add using system Diagnostics you should have you should only need to use three namespaces for this tutorial so now that we have button one click private void you can double click on disconnect as well if you want that's also going to create a private void for that and that should be good so now we can begin writing some code let's start this off with our button one our connect button with an if statement so if combobox one text is equal to server remember how bare woops finish that if statement off remember how I made it say server here so that if the combo box equals server and the radio button one is checked then it'll run whatever's inside here we can also do it else if combobox one text equals server and radio button 2 just checked meaning if the only server that we have is server right if UDP is selected it'll connect this is radio button 1 and then in our else--if statement radio button 2 if this is checked then this will connect with tcp instead so now that we have our if and else if statements set up we can start by writing some code so process start with a new process let's also add a process start info we're going to use a lot of start info in this tutorial whoops so new process new process starting Phil let's add some start info let's start with a filename this is actually the file what's kind of that's going to connect to the VPN so Open File Explorer go to your local disk program files Open VPN this should it should be here for everybody but if not it's good to double check that your Open VPN exe is in here so I'm just going to copy this Open VPN dot exe copy all that and paste it in there next we'll add some arguments this is actually going to be the open VPN configuration file that we're going to make so config I don't really know a server name so I'm just gonna say a server to VPN not sure where what region I'll use yet start info again we'll do a verb run as this is this ensures that you're running as an administrator and then process start info start info process start and that's about it you can go ahead and copy that and paste it in our other else if statement also another thing you could add here is a message box and say something like you've connected to server with UDP copy that and also paste it down here also I accidentally didn't copy that make sure you so make sure that you can just copy paste this and post it in your other else if statement and it should work fine down here is our button to click you remember but button to is our disconnects button so we're actually going to need to create a function or a method for this you can start with saying like disconnects and it'll automatically generate a method down here so private void disconnects the way we can start this is let's start with process start new process start info close that off with waits for exit and that should be good rush it start info whoops I think I added an extra I messed up somewhere there we go and what this function is going to do here is it's basically going to kill our OpenVPN exe so that we disconnect from the VPN so start with file name tasks or it will just say tasks he'll all right we'll give us some arguments and this is what is going to kill the process so if I am and then our OpenVPN exe you see right here it says OpenVPN exe this is a file we're going to be killing create no window set that's a true use shell execute so that's a false oops and that's good this so this is our function our disconnect function as soon as somebody hits the disconnect button this function will execute and kill the OpenVPN if it's running so let's double check this server UDP connect you've connected to the server with UDP TCP you've connected to server with UDP oh shoot I change this to TCP obviously run that you've connected to server TCP there we go everything's running good everything looks good I guess we can go ahead and begin configuring our server or creating our server and then configuring it for UDP and TCP protocol so like I said I'm using digital ocean for this it's all free it's like a free 30-day trial go to your projects go to get started with a droplet this will load you've been to eighteen point oh four point three is fine starter plan five bucks a month region I'm gonna go with London United Kingdom you guys can choose any of these I just prefer to go with this one one time password and create triplet this should only take a couple seconds to create and it's made good to my Inbox your new droplet your new droplet is all set to go your IP address right here copy that and let's open our putty open up putty and it should say hostname or IP address this is where we put our IP address it'll say it'll bring up a security alert you can just hit yesterday login our username is root our password is right here a change in password for root current UNIX password enter that password again and then create a new password and we're in so now that we're into our server we can begin configuring it and installing open VPN on it the first thing we want to do is go to the github of our Open VPN installer I'll leave a link to this github in the description if you guys want basically this guy made a really quick way to install Open VPN on really any any any distro so copy that run these commands right here it'll ask you some information like your server IP address do you want to use a custom port we'll just use the default UDP enter enter enter and then it'll make it in the meantime while this server is being created let's go ahead and copy our IP address again and open FileZilla login with root and the password that we just made and port 22 quick connects you might get an update from FileZilla just close out of that go back to our putty client it says tell me a name for the client I'm going to name this UK UDP and no password and then hit refresh on FileZilla and you'll see our UK UDP Open VPN file has been made we can drag this onto our desktop that successfully transferred don't sour desktop and now what we're going to do is we're going to create a TCP configuration and that's actually done because the owner of this github didn't actually add a TCP option to run UDP and TCP at the same time you see we can check by running this command here and this basically checks port one one nine four and you can see we do have UDP running OpenVPN UDP running but there's no tcp well there's no option to add tcp i'm going to show you guys how to do that real quick here simply go to the remote site here at the top of FileZilla it type in /etc forward slash Open VPN you'll see a server config file drag that on your desktop copy it paste it on the desktop and name it server to that config and if we go ahead and open the first server config you'll see it says proto meaning protocol UDP on port one 194 using server ten point eight point zero point zero let's go ahead and open our server to config and let's change protocol UDP to TCP let's replace server ten point eight to ten point nine and save drag that back into the server hit refresh oops you should see a server to config show up I'm going to drag it and drop it again see there we go so now I have server duck config and I also have a server to that config which is good we can delete these off of our desktop now and open our putty back up and let's put some IP tables in here so let me extend this so you guys can see it a little bit better IP tables all the stuff will be in the description this is opening port 1 1 9 4 4 TCP accept and this command here will open that new server we just created 10.9 accepts and all we got to do now is we start our Open VPN server so service of MVP enters restart and then type the same command Open VPN s over to or start go back into files of the forward slash routes in here you'll see a Open VPN slash install that Sh hit view or edit on that make it a little bit bigger and what we're gonna do here is we're gonna find or actually we're going to go to line 8 8 3 it's gonna be a little bit different for you guys because the github owner if he were to change some code in here you know this obviously wouldn't be line III anymore because he could add you know GGG here and this this is now line 886 so anywhere that looks like around this coat area it should be fine we're only pasting one line of code in here and that's this line of code right here said I server to the server to config that we just made ctrl save close would you like to save yes refresh and that's all good we can go ahead and restart again if you we could have done that art before but it doesn't really matter and now when we run that command from earlier look at this we've got TCP running now open VPN and we also have UDP running Open VPN all we got to do now copy the UK UDP paste it let's call this UK TCP open with notepad change that protocol to TCP safe now we've got both of our Open VPN configuration files UK UDP and UK TCP open our file explorer go to local disk go to Program Files I believe all right now I'm sorry go to users Shane or whatever your name is on the PC source repos VPN VPN bin-debug and here is where we can paste those configuration files go back into our VPN back out of that a little bit and I'll zoom in so you guys can see make sure the configuration file we made earlier it's the same name so UK UDP for a radio button one that's UDP and this one has to be UK TCP and that should be fine so now we both we have all of our configuration setup on our server we can close out of putty we can close out of FileZilla let's go ahead and give this a test select your server server UDP connect and you can see you've connected the server with UDP and you'll see a CMD open in the background this is actually Open VPN DXE running and connecting you to the server I'm going to open my Chrome backup go to what is my IP address comm and now I'm located digital ocean United Kingdom let's go ahead and disconnect hit f5 and now I'm back in the United States with Verizon Wireless so our VPN has successfully been made oh we should probably test the TCP protocol that we just made as well so go to what's my IP address comm connect with TCP you've connected to server with TCP let all this run and then go and hit f5 now I'm back in United Kingdom with digital ocean so we've confirmed that UDP and TCP are both working we can disconnect and let's actually add something in here so that that black CMD screen doesn't pop up in the background we can start that or we can do that by saying Start info window style process window style hidden copy that and paste it into our other else if statement also go down here I'm going to add a message box just so that we know we disconnected we hit a disconnect button you've disconnected from Terr server that's fine start our program up again select server UDP connect if connected to the server with UDP f5 I'm in the United Kingdom and there's no of that background CMD coming up hit disconnect you've disconnected from the server let's hit f5 I'm back in the United States ok now let's test it with TCP hit connect you've connected the server with TCP let's hit f5 whoops give it another second and digitalocean United Kingdom so disconnect from that open our notes back up and the fourth thing of this I wanted to talk about was accessing restricted content with the VPN we just made so I'm going to go to youtube and we are disconnected from the VPN right now so open a tab and go to youtube.com you see this video here is unavailable this video contains content from Viacom who has blocked in your country on copyright grounds I can't see the video I can't see comments or turned off I can't see anything let's connect to our server you've connected server with UDP let's hit f5 and the video is loaded I can look at all the comments all the videos we just bypassed the YouTube restriction with a simple VPN client like this hit disconnect you've disconnected from the server let's go ahead hit f5 on YouTube and I'm blocked I can't see comments I can't see the videos everything's blocked let's try connecting with TCP connect you've connected to the server with TCP hit f5 and the video is loaded all the comments are loaded disconnect at 5 and we're blocked so that's just a real-world example of how this VPN this simple tool we just made today can you can access any website any YouTube video that is restricted in your country so I hope you guys enjoyed we covered all four things today yep I think that's about it for this video I hope you guys enjoyed if you'd like to see some more videos like this comment down below what you'd like to see if you enjoyed this video please leave a like or subscribe and that's it thanks for watching you guys

Channel: Shanesreal

Views: 36,808

Keywords: Visual Studio, C# Coding, C# Programming, Windows Forms App, VPN, Fast free vpn, VPN Tutorial, UDP, TCP, Server Configuration, VPN 2020, cisco vpn, vpn client, windows vpn, macos vpn, vpn free, vpn server, download vpn, what is vpn, setup vpn, vpn connection, vpn access, vpn iphone, sonicwall vpn, windows 7 vpn, windows 10 vpn, openvpn, encrypted vpn, server location, kill switch, dns server, no log, router, support, free vpn, cheap, private, best vpn, how to make vpn, how

Id: zcJayEW6nX8

Length: 32min 25sec (1945 seconds)

Published: Sat Nov 30 2019