8. Security
Network Address Translation (NAT)
NAT allows private networks that use unregistered IP addresses to connect to the internet. NAT translates
private IP addresses in the internal network to public IP addresses before forwarding the packets onto
another network.
Application Layer Gateway (ALG)
The ALG function allows you to implement transparent network translation on certain application layer
protocols. NAT ALG supports the following protocols:
• File Transfer Protocol (FTP)
• Point-to-Point Tunneling Protocol (PPTP)
• Session Initiation Protocol (SIP)
You can enable the ALG function on these protocols by enabling the toggle switch located beside the
protocol name.
Port Forwarding
You can configure port forwarding rules that can be used to direct incoming and outgoing traffic on your
router to a device connected to your network.
Adding a Port Forwarding Rule
1. Go to NAT > Port Forwarding .
2. Click Add Rule.
The Add Rule window appears.
3. Configure the rule settings.
Setting User Action
Protocol Select from the following options:
• All
• TCP
• UDP
WAN service port Specify the service port for the rule.
Host IP address Specify the LAN IP address.
LAN service port View the LAN service port information.
Allowed remote IPs Specify one or more remote IP addresses.
Note
Leaving this field blank will allow access from any
remote IP address.
Description Specify the rule description.
QMiroPlus-201W User Guide
Security 51
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