Hardware Management
Troubleshooting Routers
If you encounter a problem while connecting or using your
If you have properly set port forwarding on your router and remote access still does not work, you may have multiple routers on your network. In this situation, you will most likely have two NAT (Network Address Translation) firewalls.
1.One of the easiest ways to identify this issue is to log in to the router to which the
2.Once you have logged in, go to the page that shows the router's WAN IP address, usually Status or Network Info.
3.If the WAN IP address begins with 192.168, 10, or 172, you may have a NAT Firewall between the router and internet connection.
There are several options for resolving double NAT situations. The sections below explore the pros and cons of each resolution:
These instructions will refer to the router that is connected directly to the internet as the Primary Router. The cascaded router or router to which your
●Use the primary router's DMZ
●Port forward the primary router to the secondary router
●Put the secondary router in bridging mode
●Put the primary router in bridging mode
Enabling the DMZ
Most routers have a feature called DMZ or Default Server. DMZ stands for Demilitarized Zone, Data Management Zone, Demarcation Done, or Perimeter Network. The DMZ allows you to enter an IP address that will exist outside the router's NAT Firewall.
This is the easiest way to configure your network to handle double NAT situations; however, it is dependent upon DMZ functionality within your primary router.
To enable the DMZ:
1.Log in to the primary router.
2.Navigate to the settings page for DMZ or Default Server. Refer to the documentation that came with your router for information on where this feature is found.
3.Enter the secondary router's IP address.
4.Save your settings.
Your secondary router is no longer behind your primary router's firewall. If port forwarding is correctly configured, remote access should now be working properly. Moving your secondary router into the DMZ should not have any effect on the security of the network, since it is still protected by the secondary router's firewall.
142 Troubleshooting Routers
