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Find out what OpenVPN is and, what the one on NordVPN is@ https://nordvpn.sjv.io/c/376211/570073/7452.

i. NordVPN uses the following OpenVPN ports:

* **TCP:** 443
* **UDP:** 1194

You can use either port to connect to NordVPN using OpenVPN. However, TCP is generally more reliable than UDP, so it is a good choice if you are experiencing connection problems.

If you are using a firewall, you will need to open these ports in order to be able to use OpenVPN with NordVPN. You can find instructions on how to open ports in your firewall on the NordVPN website.

Here are some additional tips for connecting to NordVPN using OpenVPN:

* Make sure that you are using the latest version of the NordVPN app.
* Try connecting to a different NordVPN server.
* Try restarting your router and modem.
* Disable your firewall and antivirus software temporarily.
* Contact NordVPN support for assistance.

ii. Here is a list of some common issues that users may encounter when using NordVPN OpenVPN:

* **Connection problems:** Users may have difficulty connecting to NordVPN servers using OpenVPN. This can be caused by a number of factors, such as firewall settings, internet connection problems, or problems with the NordVPN servers themselves.
* **Slow speeds:** OpenVPN can sometimes cause slower internet speeds than other VPN protocols. This is because OpenVPN uses more encryption than other protocols.
* **Dropped connections:** OpenVPN connections can sometimes drop, especially if the user is using a UDP connection. This is because UDP is a less reliable protocol than TCP.
* **Port blocking:** Some ISPs block certain ports, including the ports that NordVPN uses for OpenVPN connections. If the user's ISP is blocking these ports, they will not be able to connect to NordVPN using OpenVPN.
* **Incompatibility:** OpenVPN is not compatible with all devices. Users should check to make sure that their device is compatible with OpenVPN before trying to use it with NordVPN.

Here are some tips for troubleshooting NordVPN OpenVPN issues:

* **Try connecting to a different NordVPN server.**
* **Try changing the OpenVPN protocol (TCP to UDP or vice versa).**
* **Disable your firewall and antivirus software temporarily.**
* **Update the NordVPN app to the latest version.**
* **Restart your router and modem.**
* **Contact NordVPN support for assistance.**