OpenVPN Connect client and ZeroTier
Posted: Mon Sep 20, 2021 7:06 pm
I have been using both ZeroTier and the OpenVPN Connect client for some time now for different reasons on Windows 10. ZeroTier is used for remote clients to backup data, while OpenVPN requires login credentials to access internal networks. Both networks are totally separate.
I updated the OpenVPN Connect client from 3.2.3 to 3.3.1. After doing this the client hangs upon attempted connection to the OpenVPN server.
Using Wireshark, I determined that this is due to traffic from the OpenVPN client being routed through the ZeroTier gateway rather than through my laptop wireless interface.
If I disable the ZeroTier service on my laptop, OpenVPN works again. If I revert back to the original version of the client I was using (3.2.3), no OpenVPN traffic goes through the ZeroTier adapter and everything works.
So far I cannot find a way to force OpenVPN Connect to ignore the ZeroTier adapter entirely (such as by playing with interface metrics). If anyone has seen something like this before I'd appreciate some ideas.
I updated the OpenVPN Connect client from 3.2.3 to 3.3.1. After doing this the client hangs upon attempted connection to the OpenVPN server.
Using Wireshark, I determined that this is due to traffic from the OpenVPN client being routed through the ZeroTier gateway rather than through my laptop wireless interface.
If I disable the ZeroTier service on my laptop, OpenVPN works again. If I revert back to the original version of the client I was using (3.2.3), no OpenVPN traffic goes through the ZeroTier adapter and everything works.
So far I cannot find a way to force OpenVPN Connect to ignore the ZeroTier adapter entirely (such as by playing with interface metrics). If anyone has seen something like this before I'd appreciate some ideas.