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6.4 Basic Traffic Rule Types
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Multihoming
Multihoming is a term used for situations when one network interface connected to
the Internet uses multiple public IP addresses. Typically, multiple services are available
through individual IP addresses (this implies that the services are mutually independent).
Example: In the local network a web server web1 with IP address 192.168.1.100 and
a web server web2 with IP address 192.168.1.200 are running in the local network. The
interface connected to the Internet uses two public IP addresses — 63.157.211.10 and
63.157.211.11. We want the server web1 to be available from the Internet at the IP
address 63.157.211.10, the server web2 at the IP address 63.157.211.11.
The two following traffic rules must be defined in WinRoute to enable this configuration:
Figure 6.25 Multihoming — web servers mapping
Source
Interface connected to the Internet (requests from the Internet will arrive on this
interface).
Destination
An appropriate IP address of the interface connected to the Internet (use the Host
option for insertion of an IP address).
Service
Service which will be available through this interface (the HTTP service in case of
a Web server).
Action
Select the Allow option, otherwise all traffic will be blocked and the function of port
mapping will be irrelevant.
Translation
Go to the Destination NAT (Port Mapping) section, select the Translate to IP address
option and specify IP address of a corresponding Web server (web1 or web2).
Limiting Internet Access
Sometimes, it is helpful to limit users access to the Internet services from the local
network. Access to Internet services can be limited in several ways. In the following
examples, the limitation rules use IP translation. There is no need to define other rules