Network & Security Blog

Fortigate VDOMs

February 15th, 2012

Daniel

Fortigate VDOMs

What are Fortigate VDOMs(Virtual Domains)?

Well Fortigate VDOMs are like ASAs contexts, you are able to separate the firewall so it looks like you have 2, with different management and user groups. With ASA you lose some features when you enabled contexts, but in the Fortinets’ Firewall you do not lose any features.(Isn’t that just great?!)

VDOMs features:

1. Have separate routing and firewall services

2. Each physical interface belongs to only one Virtual Domains

3. By Default for the VDOMs to communicate you need an external source(Internet) to allow the communications

4. By Default 10 VDOMs are supported (in NAT or Transparent Modes)

5. The Configuration file of the Fortigate, holds all VDOM configuration. EX: AntiVirus, IPS and System Time

I. VDOM Configuration Features:

Fortigate Tutorial – Web Filtering

January 30th, 2012

Daniel

Fortigate Tutorial – Web Filtering

Fortigate processes Web Filtering options in the following order:

1. URL Filtering

2. Fortiguard Web Filtering

3. Content Exempt

4. Content Block

5. Script Filter

6. Antivirus

Let’s talk a little about all of them:

1. URL Filtering – you define what URLs the Fortigate can block

2. Fortiguard Web Filtering – based on the categories you choose, the Fortigate will block the pages

3. Web Content block

This option blocks specific words or patterns. You can use Perl regular expressions and the based on scores you can block those

4. Web Content Exemption – allows the administrator to override the web content block feature.

Fortigate Tutorial – Spam Filtering

January 30th, 2012

Daniel

Fortigate Tutorial – Spam Filtering

Fortiguard uses the industry standard definition of spam as Unsolicite Bulk Email.

Here are the Spam Filtering Methods implemented by Fortinet to its appliances:

1. IP Address Check

2. URL Check

3. Email Checksum Check

4. Spam Submission

5. Block/White List

6. HELO DNS Lookup

7. Return E-mail DNS check

8. Banned Words

9. MIME check

10. DNS Blackhole List (DNSBL) and Open Relay Database List (ORDBL)

II. Fortiguar AntiSpam

Global Filters

1. FortiIP Sender IP Reputation Database (based on the reputation of the IP)

Twitter Account

January 30th, 2012

Daniel

Hello,

I just created a Twitter Account. You can find me here.

Follow me for great Networking and Security News.

How to fix the MBR in 7 easy steps

January 30th, 2012

Daniel

How many of you broke your MBR while trying to add another Operating System. You are in luck, to fix it you do not need more than 5 minutes.
Here are the steps to do it:
1. Select from BIOS the Cd-ROM/DVD-ROM as your first boot device.
2. Save options and exit
3. Put the bootable Windows 7/XP/Vista in your CD-ROM and press any key when you see the prompt “Press any key to boot from CDROM”
4. You will get prompted with a blue screen. Press “R” for repair
5. Select the Windows you have installed(7, XP, Vista) and then enter your Administrator password.
6. You will see a DOS/CMD prompt. Just type in “FIXMBR”.
7. After the MBR is fixed typed in “EXIT” for the system to restart.

That is all! The MBR should be fixed now.

Good luck!