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Installation & working of open source firewall

Install Open Source Firewall pfSense

                     



                    pfSense is a software firewall solution based on FreeBSD. pfSense is installed on a dedicated server and requires at least two network interfaces to operate as a firewall. A user-friendly web interface is used to configure the firewall. Special FreeBSD know-how is therefore not required for managing the firewall. However, if you want to make any configuration changes directly via the command line, you should be accordingly familiar with FreeBSD.



Hardware Compatibility
Since pfSense is based on FreeBSD, the same hardware compatibility requirements apply as with FreeBSD. The following table shows the version schedule of the two OSes:



Versions pfSense <-> FreeBSD (pfsense.org)


Compatible Systems from Thomas-Krenn
The following servers were tested with a pfSense installation by the Thomas-Krenn team:

1U Intel Single-CPU RI1102H Server P9D-MV
Network chip used on the Asus P9D-MV Mainboard
i210, supported since FreeBSD 9.1 (freebsd.org)
INDIVIDUALLY CONFIGURE THIS SERVER!



1U Intel Single-CPU RI1102H Server X10SLH-F
Network chip used on the Supermicro_X10SLH-F_Motherboard
i210, supported since FreeBSD 9.1 (freebsd.org)
INDIVIDUALLY CONFIGURE THIS SERVER!



Additional Network Cards
Add-on card Intel I210-T1 single port
See support onboard, i210
Add-on card Intel I350-T2 dual port
i350, supported since FreeBSD 8.3 (freebsd.org)
Hardware RAID Controllers
Note: The onboard RAID controller is not usable for RAIDs

Adaptec
Adaptec 6405 SAS2 4x internal
Adaptec 8405 SAS3 4x internal
Adaptec 8805 SAS3 8x internal
Avago / LSI
Avago MegaRAID 9260-4i SAS2 4x internal
Avago MegaRAID 9271-4i SAS2 4x internal
Avago MegaRAID 9271-8i SAS2 8x internal
Avago MegaRAID 9361-4i SAS3 4x internal
Avago MegaRAID 9361-8i SAS3 8x internal


Installation
You can also find helpful information about installing pfSense at:

pfSense Installation (pfSense.org)
Note: If you would like to install pfSense on a USB stick, please take a look at the article Install Open Source Firewall pfSense on an USB Stick!
The following installation methods are possible:

Via Live CD with Installer
For this installation type, please use the Live CD with Installer, which can be downloaded from the pfSense website - pfSense Download Mirrors
It is recommended that you export the Live CD iso file via the IPMI-KVM console to the target system. You can boot from the virtual drive now. As an alternative, you can burn the Live CD to a disc and run it from a physical drive.
Via Live CD with Installer on a USB stick
For this installation type, please use the Live CD with Installer (on USB Memstick), which can be downloaded from the pfSense website. Choose VGAas console – pfSense Download Mirrors
Create an USB stick if USB Memstick image will be used:


$ gunzip pfSense-memstick-2.2-RELEASE-amd64.img.gz
$ sudo dd if=pfSense-memstick-2.2-RELEASE-amd64.img of=/dev/sdb bs=1M




Installation Dialogue

Pressing Enter starts the installation in default multi-user mode.
Loading the kernel.
The default settings will be used for the console.
A quick installation is recommended for novices.
A warning stating that the hard drive will be formatted. All data on the hard drive will be lost.
Copying installation data.
If needed, one can adjust the kernel configuration.
Once the installation data has been copied, the system will need a restart. After the reboot, one can configure the interfaces.
Rebooting.
If desired, one can activate VLANs.
Selecting the WAN interface.
In this example, igb1 is the WAN interface.
Selecting the LAN interface. In this example, igb0 is the LAN interface.
Confirming the WAN and LAN configuration.
Applying the configuration.
The pfSense shell offers several configuration options.
Number 8 starts a shell.
The shell shows us a hint regarding the web configurator.
The default login is admin and pfSense.
Number 3 can reset the password to pfSense.
The wizard helps with the most important settings.
Here, host names, domains and DNS servers can be set.
The time server can also be changed if needed.
The configuration dialogue for the WAN interface.
Configuring the LAN interface.
It is highly advisable to change the default password immediately
Reloading the configuration.
The wizard is now complete.
The dashboard offers a good overview of the current status.


Conclusion :-
                     In my opinion ,We can define that A firewall is a system that provides network security by filtering incoming and outgoing network traffic based on a set of user-defined rules. And We can make more security in our work because firewalls provide an essential layer of security that, combined with other measures, prevent attackers from accessing your servers in malicious ways.

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