Cerberus P 6391
37
Add or Modify a Virtual Server Entry
Service Port
- The numbers of External Ports. You can enter a service port or a range of
service ports (the format is XXX - YYY, XXX is Start port, YYY is End port).
IP Address
- The IP address of the PC running the service application.
Protocol
- The protocol used for this application, either
TCP
,
UDP
, or
All
(all protocols
supported by the router).
Status
- Select
Enabled
or
Disabled
for this entry on the pull-down list.
Common Service Port
- Some common services already exist in the pull-down list.
Click the
Save
button to save this settings.
Forwarding / Port Triggering
Some applications require multiple connections, like Internet games, video conferencing,
Internet telephoning and so on. These applications cannot work with a pure NAT router. Port
Triggering is used for some of these applications that can work with an NAT router. Once
configured, operation is as follows: A local host makes an outgoing connection to an external
host using a destination port number defined in the
Trigger Port
field. The router records this
connection, opens the incoming port or ports associated with this entry in the
Port Triggering
table, and associates them with the local host. When necessary the external host will be able
to connect to the local host using one of the ports defined in the
Incoming Ports
field.
Trigger Port
- The port for outgoing traffic. An outgoing connection using this port will
Trigger
this rule.
Trigger Protocol
- The protocol used for
Trigger Ports
, either
TCP
,
UDP
, or
All
(all protocols
support by the router).
Incoming Ports
- The port or port range used by the remote system when it responds to the
outgoing request. A response using one of these ports will be forwarded to the PC which
triggered this rule.
Summary of Contents for Cerberus P6391
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