Zhone 6738 User Manual page 75

ZHONG 6738 User Manual
Custom Server: Enter a new service name to establish a user service type.
Server IP Address or Hostname: Assign an IP address to virtual server.
Status: You can choose Enable or Disable from the drop-down list.
External Port Start: When selecting a service, the port number will
automatically be displayed. You can modify it if necessary.
External Port End: When selecting a service, the port number will
automatically be displayed. You can modify it if necessary.
Protocol: You may select TCP/UDP, TCP or UDP in the drop-down list.
Internal Port Start: When selecting a service, the port number will
automatically be displayed. You can modify it if necessary.
Internal Port End: When selecting a service, the port number will
automatically be displayed. You can modify it if necessary.
After finishing setting, click Save/Apply to save and apply the settings.
Port Triggering
Some applications need some ports to be opened in the firewall for the remote
access. When an application initializes a TCP/UDP to connect to a remote user,
port triggering dynamically opens the open ports of the firewall.
Choose Advanced Settings > NAT > Port Triggering, and the following page
appears.
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