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Linux 3.14.3-1-ARCH on Arch Linux, affected by CVE-2014-0196
Seem to be fixed in 3.14.3-2-ARCH updated on the same day.
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.
As of this evening, this is how my Eee 701SD netbook's desktop looks - this is Arch Linux, running the Fluxbox window manager, with XMMS, XFCE Terminal and Conky in the main area, and wmdrawer, GKrellM, wmvolman and wmbinclock in the "slit" (dock) on the right. The slit has "pseudo-transparency" turned on, and GKrellM is using the "Hardware" (alternative) theme - pretty cool-looking, I think :-)
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"
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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