Hamachi:Failed to Configure Hamachi Network Adapter

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Contents

Message

Failed to configure Hamachi network adapter
Failed to configure Hamachi network adapter.

Context

There are a few possible causes for this problem.

You will typically receive this message when your personal firewall, like ZoneAlarm, Sygate, Norton, etc., is blocking network traffic on the Hamachi Network Connection.

When Hamachi is installed, it adds a virtual networking adapter that appears in standard Windows' Network Connections folder.

This adapter is fully controlled by Hamachi when it is running. Everything that Windows sends out over this connection is delivered to hamachi.exe.

When Hamachi starts up, it enables this connection and Windows starts the procedure of assigning it a network IP address. This usually involves sending and receiving few networks packets over the network adapter that is being configured.

The error you are seeing means that the Hamachi application did not receive these packets and therefore Windows failed to assign the required IP address to the Hamachi network connection.

Resolution

  1. A personal firewall blocking the initial network exchange. At the very least your firewall configuration must allow traffic to/from IP address 5.0.0.1 on the Hamachi Connection. This is an address of DHCP server emulated by hamachi.exe Also note that some less popular firewalls have problems coping with network adapters being dynamically enabled and disabled as it happens in Hamachi’s case. In other words, keep in mind that your firewall might not accommodate for this possibility when troubleshooting. Keep in mind that when troubleshooting firewalls, some of them don't fully shut down when you disable them until you reboot with them turned off.
  2. The Hamachi connection has been configured to use a static IP address rather then being set to Acquire Network Address Automatically. Right click the Hamachi network adapter, Properties, select TCP/IP item, open its properties and make sure it is set to Acquire Network Address Automatically.
  3. The DHCP Client service is not working properly. This was reported on two separate occasions. In one case it was sufficient to restart 'DHCP Client Agent' service and in another it required a reboot. To restart the service, go to Start > Run type “services.msc” and hit enter. Find the DHCP Client Service, right click, and restart it. Rebooting the PC will also achieve the same outcome.
  4. There is another network adapter (such as a different VPN software, i.e. Cisco, etc) on the computer that is interfering. If you have more than one VPN solution installed, try turning the other one off.
  5. Some users have reported that enabling/disabling the QoS Packet Scheduler service on the adapter has proven successful. To do this, right-click the adapter, go to Properties, and find it in the list. Un-check it and apply the change.
  6. Windows may have had an issue installing TCP/IP to the network adapter. To fix this, go into the adapter properties, un-check TCP/IP, apply, then check TCP/IP, and apply. This effectively reinstalls TCP/IP on the Hamachi network adapter.
  7. You can run a WinSock fix to revert the Windows networking stack to defaults. You can get the program to do that here.
  8. As a last resort, you can also configure the Hamachi adapter statically, however this would require you to have already been able to have Hamachi enable the adapter at least once and assign you a Hamachi IP. You can then configure the TCP/IP properties of the adapter with your Hamachi IP, subnet 255.0.0.0, and the rest of the settings blank. If you get this error, it's because you configured the IP incorrectly or did not already have a Hamachi identity.


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