Network · medium

How to fixVPN-TUN-DROP

Encrypted VPN tunnel crash

What this error means

VPN-TUN-DROP is a medium-severity network adapter problem. The encrypted VPN connection was unexpectedly terminated by the firewall. Common triggers are ISP Provider Error, corrupt network card driver, stuck Router and IP address conflict. Follow the steps below to fix it.

Before you begin

Save open work and back up important files. Note any recent driver or hardware changes. If Windows cannot start, use the startup guide first.

Work through these checks

0 of 3 complete
01Restart the router (turn off for 1 minute)

Restart the router (turn off for 1 minute).

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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02Reset complete network settings in Windows

Reset complete network settings in Windows.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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03Change the DNS servers to 8.8.8.8

Change the DNS servers to 8.8.8.8.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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Possible causes

  • ISP Provider Error
  • Corrupt network card driver
  • Stuck Router
  • IP address conflict