Hello, I am receiving the above error in the subject line when trying to connect from my Gl-Inet router to the OpenVPN server that is running on my DDWRT router. Here is some information:
At one point on my GL-AR750S-EXT router, I was successfully able to connect from it to my OpenVPN server, but once I upgraded the AR750S to a newer firmware version, I could no longer connect.
o unfortunately I do not recall the firmware version that it was previously working.
I also tried to connect from my GL-MT1300 to the same OpenVPN server on my DDWRT router and I get the same error.
However, I am successfully able to connect from my Windows 10 PC using OpenVPN GUI using the same .ovpn file that I installed and zipped along with ca.crt, client.crt, and client.key on the AR750S and MT1300.
I do have another DDWRT router that is operating as a OpenVPN client and it connects without a problem to the DDWRT.
Here is the error message on the Gl-Inet router:
daemon.err ovpnclient[29986]: write to TUN/TAP : Invalid argument (code=22)
Hello, thank you for getting back to me....this entire setup is a 'TAP' solution. Also, as mentioned, on my Windows 10 PC, I have OpenVPN installed using my .ovpn file (which has 'dev tap'), ca.crt, Client.crt, and Client.key and I can successfully connect to the remote OpenVPN server running on my DDWRT router. However, when I zip these same 4 files together to create a .zip file for either my AR-750S or MT1300 router, I receive the "Invalid argument (code=22)" error when I enable the VPN client.
