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The DHCP page contains settings of the integrated DHCP-server.

You should specify the range of dynamically assigned addresses here. Note that the subnet addresses depend on the router’s own address. If the latter is changed, the three fields of the IP address on this page change automatically. A rather queer method is used to assign dynamic IP addresses: not sequentially, but at random from the specified range (this is typical of D-Link’s equipment, though). You can also bind certain IP addresses to specific MAC addresses. Information about all the assigned addresses is shown on this page as a dynamically changing list.

The VPN page contains settings of the router’s main feature, the VPN-server.

I’ll talk about it at length below.

The next group of settings is called Advanced. Here you’ll find all the settings related to the device’s operation. The first page in this group is called Virtual Server:

Here you can set up virtual servers on the internal network to communicate with applications that refuse to work via NAT. Having set up a virtual server, you can make it work by a schedule. The page also contains a ready-made list for specific protocols. The elements of this list can be edited or deleted as necessary.

The Application page is for setting up connections that do not work via NAT.

These settings pertain to those applications that need ports that wouldn’t be changed by NAT. Such settings are often referred to as Trigger Port in networking equipment. The next page is called Filter and contains packet filtering options.

Besides the standard filtering based on IP address, MAC address or text address, you can also filter out packets from certain domains as well as to filter by MAC address to access a VPN tunnel.

 
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