A VPN server is configured on the router Linksys WRT1900ACS. When connecting to it from a Windows PC (via openvpn), there are no problems (normal speed, all network resources are normally opened). But on Linux (Arch Linux, tried with two PC) with the same VPN client configuration as for Windows - the speed is much lower. Also, when changing and saving the settings of the web page of the router, an error occurs that the connection is not protected (firefox) and doesn't save anything. Through ssh often hangs, I have to reconnect the VPN connection. In general, it seems that something is blocking the VPN.
you will need to provide a lot more detail (what VPN, what are your configs, etc.).
Just a thought, though... if you are using OpenVPN, you may be using dev tap for windows. That doesn't usually play nice with linux. Try dev tun instead (which may break windows compatibility)
@JW0914 - I agree that tun should be used in the vast majority of cases.
Regarding tun issues with Windows -- I don't have a source to cite and have never tried it myself (I'm Mac, Linux, and iOS based, no Windows at all), but I have a recollection of someone saying that they could only use dev tap on Windows (dev tun failed). Maybe that was an edge case, or maybe something else with the config or the Windows firewall was really the root of the problem, but for some reason I was under the impression that Windows wasn't always happy with dev tun.
Please include the information requested under Troubleshooting for your next post.
@psherman They were either doing something wrong, or perhaps were confused with the TAP adapter on Windows, and possibly believing that meant they had to use TAP
The Windows TCP/IP stack is completely different than Unix based OSes, and because of this, dummy/vLANs/new interfaces cannot be created without physical hardware for them to be tied to... This is why OpenVPN had to build separate software just to create a TAP adapter, which is awesome, because you can use their TAP adapter software to create as many interfaces as you want to create vLANs for separate uses =] (it's normally not possible to create vLANs with Windows)
Hi guys! Sorry that I did not reply for a while. It seems I solved the problem. I tried to connect to VPN from another network and in Linux works fine now! It seems that the problem was only in one network. I will sort this out. Thank you all for your help!