= Firewall Issues =

<<TableOfContents()>>

== Mudfish Master Server ==

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

=== Using -O option ===

 * Moves “Mudfish Cloud VPN” menu from Start button.

 * Opens the property window of “Mudfish Launcher” icon.

 * 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 }}}

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

=== Using -t option ===

 * This option is '''only''' available on v4 version.  If you're using mudfish v3 version, it's not supported.

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

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

 * -t option turns on a feature sending a fake HTTP request.

{{attachment:option_o.png}}

== Mudfish Nodes ==

This section describes information if you have a problem to communicate with Mudfish nodes (not master server).

=== Changing Connection Protocol ===

 * As default, Mudfish could communicate with Mudfish nodes based on TCP (port 10008) and UDP (port 10008) based.  And default is UDP-based.
 * If you feel that your connections are blocked by network firewall, you can change the connection protocol from one to another
  * At 'Setup -> Program', you can see these options.
  * If you're enabled the expert mode, you can see more options for connection protocol.  For examples,
   * TCP (Port 10008)
   * TCP (Port 443)
   * TCP (Port 10006)
   * UDP (Port 10008)
   * UDP (Port 53)
   * UDP (Port 10006) 

=== Changing Mac Address ===

Some network firewall blocks based on Mac address of your NIC card.  With googling you can find a lot of links about how to change it for example,

 * [[http://www.howtogeek.com/192173/how-and-why-to-change-your-mac-address-on-windows-linux-and-mac/|How (and Why) to Change Your MAC Address on Windows, Linux, and Mac]]