Port Forwarding - Siemens 4100 Series User Manual

Router User's Guide

Port Forwarding

Port forwarding allows selected servers running on the LAN side of the router to be accessed from the
WAN side. Requests from the WAN to a configured TCP or UDP port will be forwarded to the selected IP
address on the LAN. NAPT functionality ensures that the LAN-side server is known to the WAN only
through the public IP address. The server's actual private IP address remains unknown to any WAN-side
hosts.
To configure port forwarding:
1. Select Setup>Port Forwarding from the left navigation pane of the Web interface. This displays the
"Port Forwarding Configuration" window.
2. Under Add/Edit Entry, do one of the following:
• Select the service you want to configure from the Select service by name drop-down menu.
• Select the protocol you want to configure from the Select protocol drop down menu. This can be
TCP, UDP, ICMP, or GRE. If you select TCP or UDP you must also specify either a single port or
range of ports that apply.
3. Select one of the following:
• Redirect selected protocol/service to this router
Select this option if you want inbound traffic forwarded to the SpeedStream.
• Redirect selected protocol/service to IP address
Select this option if you want inbound traffic forwarded to a host located on the LAN. In this case,
you must specify the IP address of the host on which the server resides.
4. Click Apply.
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Configuring Network Settings