If this isn’t set up properly, the VPN client and server might not be able to communicate. In some network setups, specific ports need to be forwarded to allow VPN traffic to pass through effectively. If these ports are blocked by your ISP, firewall, or router - or they’re not properly configured - it can prevent the VPN from establishing a successful connection. These ports need to be open and available for the VPN service to operate effectively. Common ports used by VPN protocols include TCP 1723 for PPTP, UDP 500 for IPSec/IKEv2, and UDP 1194 for OpenVPN. VPNs use specific ports to establish a connection. If the VPN server takes too long to respond to your device’s request, the VPN tunnel will simply fail to form. Much like server congestion, this is most commonly an issue with free VPNs that have poor network infrastructure or bandwidth restrictions. Slow or poor quality VPNs can also suffer from connection issues. Most VPN services will notify you when the software needs updating. In that case, you’ll need a VPN with obfuscation technology, which disguises your VPN traffic as “normal” traffic. In highly-censored countries like China, it’s also possible that your Internet Service Provider (ISP) will attempt to identify and block VPN traffic altogether. If you’re at work and need to access your company’s internal network using a VPN, contact your IT department for assistance configuring your device and VPN connection. If you are unable to connect to your VPN while using a school, public, or otherwise restricted network, try switching to a different WiFi network or use mobile data if you can. These networks may have policies in place to restrict VPN usage and prevent any unwanted network activity. Public, school, or corporate WiFi networks can sometimes block VPN connections using security software. Your ISP or the WiFi Network is Blocking VPN Traffic We’ll explain how to do it later on in this guide. If it does, you may need to add an exception for your VPN in the firewall settings. If you have a firewall enabled on your computer or router, try temporarily disabling it to see if this resolves the issue. This can happen if the VPN uses unusual ports or protocols that the firewall is not configured to allow. If a VPN service’s traffic is not recognized or is deemed potentially harmful, the firewall may block this traffic. Network firewalls can be set to blacklist specific IP ranges, to prevent connections to a single IP address, to block specific ports, or even to block all encrypted traffic. This can prevent your VPN from connecting. Your Firewall or Antivirus Is Blocking Your VPNįirewalls work by monitoring incoming and outgoing network traffic, and they can sometimes mistake VPN connections for malicious activity. In both cases, the VPN application will simply fail to connect altogether. If none of this works, the follow our advice below in order.You might experience similar issues if the server you’ve chosen is undergoing maintenance, or if you’ve reached your VPN’s simultaneous connection limit. Pick a different one to whatever is currently selected and try connecting again. The connection options will vary depending upon the device you’re using, but if you head into Settings and click on ‘Show advanced settings’ you should find the heading ‘Protocol’. Finally, you can select a different connection method within the app to see if that makes any different.If even that doesn’t work, temporarily disable and antivirus and / or firewall on your PC or laptop and see if that’s blocking the connection. No joy? Uninstall the app, reinstall it and log back in.Another quick solution if you can’t access another device is to log out of your account (within the app) and then log back in.If you still can’t connect, the issue could be your network or a problem with your NordVPN account.If the connection works fine on that, the problem is with your first device or computer. If you can’t connect to any, try the NordVPN app on a different device, such as your phone. Try connecting to a few different servers.
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