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Mudfish Master Server

This section describes about if you're encountering issues for Mudfish Master Server to connect.

Using -O option​

Since Mudfish Cloud VPN v5.7.1 or above, -O option is deprecated and removed.

If you're using this option and the latest client version, you need to remove it to launch properly.

  • After clicking "Start" button of Windows, moves to or find "Mudfish Cloud VPN" menu.

  • Opens the property window of "Mudfish Launcher" icon by clicking the right mouse button on it.

  • Modify the command which found at "Target(T)" box that as default, the following value is set::

    "C:\Program Files\Mudfish Cloud VPN\mudrun.exe"

  • Changes the command with -O option. For example, looks like below::

    "C:\Program Files\Mudfish Cloud VPN\mudrun.exe" -O

  • As result, "Target(T)" would be like below:

    Mudfish Launcher shortcut properties with the -O option

    This screenshot shows an older launcher. The -O option is only for versions before v5.7.1; remove it on v5.7.1 and later.

  • -O option turns on a feature using IP and port of old master server.

Using -t option​

If you're using Mudfish Cloud VPN v5.7.1 or above, you can simply enable -t option by clicking 'Fire Icon' at the sign in menu.

Fire icon on the Mudfish sign-in page

  • At the property window of "Mudfish Launcher" icon, modify the command as follows:

    "C:\Program Files\Mudfish Cloud VPN\mudrun.exe" -t

  • The -t option uses HTTP-based communication with the master server by sending a simulated HTTP request.

Using HTTP-Proxy option​

Since mudfish v5.2.0 or later, it provides HTTP-proxy feature to communicate with mudfish master server.

If the applicable options above do not work, you can try this option. Do not use -O on v5.7.1 or later.

For details, please check Connecting Mudfish in China link.

Changing the MAC address​

Some ISPs have been reported to block VPN connections based on a MAC address. Changing the address may help in these cases.

  • If your computer connects through a router, consult the router's manual for its Internet-facing MAC address setting. The location varies by model, and some routers do not support changing it.
  • If the Internet cable connects directly to your computer, find that network adapter and check its advanced driver settings for a MAC address option. Some drivers do not support this setting.

See Changing Mac Address for the Windows adapter example.

A reported example​

A user named never38k, using China Telecom in Shanghai, reported that both UDP and TCP VPN connections stopped working while other Internet services continued to work. Changing the ISP-provided router's MAC address restored the VPN connection, but it was blocked again about an hour later.

The user traced the recurring block to a Korean 070 Internet telephone on the network. After changing the MAC address again and switching off that telephone, the problem stopped. This is a user's reported experience, rather than a diagnosis that applies to every blocked connection.