IP-netmask
Local network's matching IP network mask
The network mask belonging to the IP address must be entered here. The default setting is 255.255.255.0 (class C network). A network mask of 255.255.255.255 means that there is only one computer in this network (the router itself). This setting (an IP address registered in the Internet with a fully assigned network mask) can be used for masquerading via a raw IP access, such as that offered by the provider of the individual network. With such an access an IP address is not assigned to the router by a PPP negotiation, but it must have a fixed IP address registered in the Internet.
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