Chapter 7
Traffic Policy
90
dropped. Therefore, it is recommended to put all rules for mapped services
at the top
of
the table of traffic rules.
Note:
If there are separate rules limiting access to mapped services, these rules must
precede mapping rules. It is usually possible to combine service mapping and access
restriction in a single rule.
Multihoming
Multihoming is a term used for situations when one network interface connected to the In-
ternet uses multiple public IP addresses. Typically, multiple services are available through
individual IP addresses (this implies that the services are mutually independent).
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 7.24
Multihoming — web servers mapping
Source
Any (see the previous example referring to mapping of single service).
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
).
Summary of Contents for Firewall6
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