Like every other website on the planet, SmallNetBuilder uses cookies. Our cookies track login status, but we only allow admins to log in anyway, so those don't apply to you. Any other cookies you pick up during your visit come from advertisers, which we don't control.
If you continue to use the site, you agree to tolerate our use of cookies. Thank you!

Router Charts

Click for Router Charts

Router Ranker

Click for Router Ranker

NAS Charts

Click for NAS Charts

NAS Ranker

Click for NAS Ranker

More Tools

Click for More Tools

LAN & WAN How To

Introduction

There are times when having two separate networks - both sharing the same Internet connection - can come in handy. For example, I recently helped a community center with its network setup. They needed to provide Internet connection to tenants who were renting space, in addition to their own shared Internet. They also shared a number of folders on the network, but weren't too careful about password protecting the shares.

Rather than trying to (unsuccessfully) enforce good file-sharing practices among users who didn't really have the inclination to learn them, I took a more pragmatic approach and separated the tenant and community center computers into their own private LANs.

Separate LANs can also keep your computer(s) safe from worm and malware infestation from your children's (or employees') machines. Let's see how it's done.

The Approach

This approach is essentially an extension of the technique described in the Setting up File and Printer sharing between two routers Problem Solver and has the same effect of blocking file and printer sharing traffic entering the WAN side of each router. The difference in this setup is that we've separated clients into two groups, each behind its own firewall that blocks any data not requested by a client behind the firewall trying to come into the WAN side of its router.

File and Printer sharing doesn't work between the two groups because although data passes through the originating computer's firewall just fine, it's blocked from entering the firewall of the computer in the other group. However, all clients can freely connect to the Internet as long as they initiate the data request, even through the request has to pass through two firewalls to get there.

More LAN & WAN

Wi-Fi System Tools
Check out our Wi-Fi System Charts, Ranker and Finder!

Featured Sponsors



Support Us!

If you like what we do and want to thank us, just buy something on Amazon. We'll get a small commission on anything you buy. Thanks!

Over In The Forums

Hello All,Our small company is expanding, maybe i should start visiting mediumnetbuilders.com more often We will be expanding in to the building next...
Version 3.0.0.4.384.327382018/08/21 45.38 MBytesASUS RT-AC5300 Firmware version 3.0.0.4.384.32738AiMesh new features- Supported creating mesh system ...
People are recommending layer 3 lite switches. What is a layer 3 lite switch? What is it's layer 3 capabilities?I would like to put a definition to th...
Hello, everyone!I have googled for the answer for quite a while, but haven't found anything. Hope you can help me.I have ASUS RT-AC68U (White, if this...
View attachment 14173‚Äč Devolo announced its Magic Wi-Fi system last week at IFA 2018.The system pairs dual-band Wi-Fi access points with second-Gener...

Don't Miss These

  • 1
  • 2
  • 3