TIPS: Linux Vlan Configuration

Now we are going to show how to configure vlans using linux. You may ask why this is necessary? and here is the answer, this is necessary when you connect your linux server directly to a router/L3 Switch and the port in router/switch end is configured as a Trunk port.

The frame that pass through a Trunk port must be tagged with a VLAN ID, This VLAN ID, tells the router what vlan to use to route the traffic to the destination. If the frame that is send through a Trunk port is not tagged then the router is going to discard the frame.

Find Below how to configure vlans with linux

• 1. Verify if the module is active using the command modprobe. If you do not receive any message then the module is installed and we can continue with step 2

1. 2. Create the vlan using the command vconfig. The command shown below create vlan 109 in the eth1 interface

1. 3.  Assign an ip address to the vlan.  

1. 4. Verify that the VLAN is UP using the command ifconfig 

This procedure create the vlan in the RAM memory, when you restart the machine all the configuration will be lost. To make the change persistent follow the next procedure

• Copy the file /etc/sysconfig/network-scripts/ifcfg-eth1 to /etc/sysconfig/network-scripts/ifcfg-eth1.109 

•  Edit the newly copied file using your preferred linux editor, for this example I’m using vim

• Change the DEVICE line from eth1 to eth1.109

•  Add the line VLAN=yes. Your file should look like the image below

•  Restart the networking daemon using the command “service network restart”

CISSP-ISSAP: Communications and network Security

Explain telecommunications RISKS and Solutions

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How to reset iPhone

Has it ever happen that you are using your iPhone and it locks up? You try pressing the sleep/wake button to turn off the phone, and this button does not work.When this happen the only solution is to reset the iPhone (Don't worry you would not erase any information stored on the iphone, is more like a reboot), to do this follow the next steps:

1. Hold the sleep/wake button at the top right of the phone and the home button at the bottom center of the face at the same time.



2. Hold them until you see the screen go black. Some times you will have to keep holding them even after the red power off slider appears.
3. Wait Until whe white Apple logo appears

4. The iphone is rebooting

CISSP-ISSEP: Certification and Accreditation (C&A) / Risk Management Framework (RMF)

Webcast that show the differences between Certification and Accreditation (C&A) and the Risk Management Framework (RMF)

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CISSP-ISSMP: System Development Security

This is one of the most important areas of security management today as it continues to grow in importance and relevance to the building of a robust security management program. Watch the video for more

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ISSMP: Security Management Practices

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ISSEP: System Security Engineering

This domain is very critical to passing the ISSEP exam. It is one of the most logical, however, don’t be fooled thinking this domain will be easy. There is a lot of detail which you must understand to be able to select the best answer on the exam. Let's get started.


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Working with HR to Develop End User Awareness Trainin

Are employees at your organization exposing you to cyber attacks?

 Learn about Working with HR to Develop End User Awareness Training and Why it’s Necessary

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CISSP-ISSAP: Access Control System and Methodology

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