June 28th, 2007 by Stargazer
A masquerade at the LAN
Today I would like to tell you some things on masquerading, an effective way for granting internet access to your internal network by setting up a gateway. Any host in your internal network – let’s call it LAN (Local Area Network) – sends its packets to the gateway if it wants to connect to the world outside of your LAN. This gateway now sends the packets to the outside and delivers the response back to the client that initiated the request. From the servers point of view outside in the internet it looks like the gateway is doing all the requests. Every packet coming from the LAN are masked.
The great benefit of masquerading: Hosts inside your LAN are not accessible from the big bad Internet. This protects you from direct attacks from there.
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