Manual Lenovo px12-450r - LifeLine 4.1 (page 155 of 167) (English)

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Troubleshooting Routers

If you encounter a problem while connecting or using your px12-450r, check the topics listed below for

possible solutions.

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 px12-450r is

connected.

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 px12-450r is connected is referred to as the

Secondary Router.

● 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.

Hardware Management

Troubleshooting Routers 145

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Others manual(s) of Lenovo px12-450r - LifeLine 4.1

Lenovo px12-450r - LifeLine 4.1 User Manual - German - 177 pages

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Lenovo px12-450r - LifeLine 4.1 Manual

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