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3 Main Components
- a router
- a 6 port switch
- a wireless port
The switch's ports are divided into port 0-3 (physical LAN ports are numbered differently) for the local LAN and Port 4 for the WAN. The switch's port 5 is connected to the router's eth0 port. Port 0 to 5 add up to 6 ports.
To separate the WAN traffic from the LAN traffic, the switch is divided into virtual LANs called VLANs. VLAN0 is LAN traffic (ports 0-3) and VLAN1 is WAN traffic (port 4). Each VLAN "appears" to be a totally separate switch - that's where the virtual part comes from.
NOTE: I've labelled the tagged VLANs as eth0.0 and eth0.1 on the following diagram which is a standard way of representing VLANs as subinterfaces on eth0 in routing BUT this is not the way that dd-wrt documentation represents them. The eth0.0 represents VLAN 0 and the eth0.1 represents VLAN 1
The connection between the switch (port 5) and the router (eth0) is called a trunk. A trunk is a connection that allows multiple VLAN traffic to pass through. In order for the trunk to identify which VLAN the data belongs to, the data frame is tagged with the VLAN number. This way when frame comes out an interface, it knows which VLAN it belongs to. Tagging only exists on the trunk.
What happens to trunk traffic that is not assigned (tagged) to a VLAN? By default it is assigned to VLAN0 (called the native VLAN or default ).
Traffic between the two VLANs is controlled by the router using iptable and ip route commands. So all data going to and from the LAN to the WAN port passes through the router.
Lastly, the wireless port eth1 (because it is not part of the switch) is bridged (using br0) to VLAN0 and is treated the same as any other port of the switch.
Now the fun part is that you are able to reconfigure and reassign any port to any VLAN and then apply new rules in the router to do the most amazing things!
One last point is that some versions of the hardware have the ports numbered differently. So in the original reference, you see [] brackets to add to the confusion ot reference the other versions of hardware.
This is Corel Linux, from a Personal Computer World cover disk from May 2000. As a desktop Linux distribution, it's probably antique by today's standards: true, it's not as old as SuSE, Debian or Slackware, but it's an old commercial distro that was discontinued in 2001 and eventually mutated into Xandros.
My favoite Linux distro - Mandriva 2007.
You can see superkaramba at work.
Well the photo shows me with my daughter watching the fireworks during Diwali in 2006
Dobio sam kolekciju od 10 CD-a Ubuntu distribucije Linuxa. Ako netko hoće nek mi baci mail pa mu šaljem CD.
How to use Twitter in a Linux terminal with Rainbow Stream
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Trucho de valla para Linux / concepto y copy daniel arango. texto: " Estamos seguros que esta valla electronica no fue programada en Linux"
a picture of my new linux OS working - I've wanted to try linux for ages but never managed to get an install all the way through, usually falling at the hurdle of configuring a thing called 'X windows' without which the OS is basically nothing more than a command line...this new (well to me) 'distro' (flavour) of linux, Ubuntu, enables you to download a disc which you can run on your machine and see whether linux will work with your hardware (without having to install anything) - it also enables you to then install linux from a nice graphical desktop space rather than some strange geek hell...and you can even keep your windows and have a 'dual boot machine' which is what I've got now, though I haven't had to boot into windows since i installed it...
Добрый вирус для роутеровВирус Linux.Wifatch защищает роутеры от вредоносного ПО и напоминает о необходимости перепрошивки.
Linux.Wifatch вызвал оживленную дискуссию в IT-сообществе в связи со своим нетипичным поведением.
По своей природе программа является вирусом (несанкционированно...
He tried to hide in my sleeping shirt, but he climbed into the sleeve and his hideout wasn't safe any more.
What are useful command-line network monitors on Linux
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How to set up remote desktop on Linux VPS using x2go
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The Evolution goes on[line] -
Seien wir mal ehrlich. Die " Barrierefreiheit "beginnt beim kostenlosen Betriebssystem. Oder?
How to set up remote desktop on Linux VPS using x2go
If you would like to use this photo, be sure to place a proper attribution linking to xmodulo.com