QNAP QHora-301W, User Manual

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For details, see Adding a Firewall Rule .
5. Click Save.
QuRouter updates the firewall rule.
Deleting a Firewall Rule
1. Go to NAT/Firewall > Firewall Rule .
2. Identify a firewall rule.
3.
Click .
A confirmation message appears.
4. Click Apply.
QuRouter deletes the firewall rule.
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
Before configuring port forwarding rules, ensure you add custom service ports in Service Port
Management. For details, see Adding a Custom Service Port .
1. Go to NAT/Firewall > NAT > Port Forwarding .
2. Click Add Rule.
The Add Rule window appears.
3. Configure the rule settings.
QHora-301W User Guide
Security Settings 56