How To Install And Use Untangle Firewall



Untangle is very lightweight, easy to install and easy to use but very effective  firewall operating system. It makes you enable to protect, monitor and protect your network, we have tested that firewall in a Institute with more the  500 users and it work perfectly.


Network Services

It can replace existing firewall and router, or can be added as addon  in transparent bridge mode.  You can mange DNS services, DHCP, you can apply  NAT rules, Router configuration etc. It comes with very easy to use GUI user interface.

Content Filtering

Web filter Lite version is available as free, very rich filter. You can filter web traffic gotup wise, file type wise, MIME wise, file extension wise. You can generate separate reports for web traffic or you can by pass some specific user from restrictions.

Security Services

Without the need of any extra hardware you can have a modern firewall. Spam blocking, virus blocking or even ad blocker is a part of open source version untangle.


A firewall is provided with enriched tools, you can block or flag traffic from particular port number, can allow or block traffic from some specific ip address range.


A secure communication is possible with OpenVPN (Available with open source version).


Top sites used, top users, top downloads etc can be monitored with the help of reports.

Captive portal

Although a captive portal is available even with open source version but as per my personal experience it is not so much effective, you can avoid that feature.


Minimum 2GB RAM, Dual Core processor, 8 GB hard drive space and minimum 2 LAN cards are required.

Download .iso image from this link. Burn to cd/dvd and start installation. Select graphic installation (default) press enter:


Select Language and click to continue.


Select your location and proceed:


Select Keyboard language and continue:


This step may take some time:


Configure your time zone:


Select yes to install the package.


Let the installation be finished:

Selection_009 Selection_010

Installation is completed, time to define required firewall parameters, select language:

Selection_012Define admin password and time zone, click next:

Selection_014Identify which interface will be connected directly to external internet connection and which interface will be connected to the LAN.

Selection_015Provide Internet (External) ip address, gateway and dns, you verify internet connectivity by  a click to  test connectivity :

Selection_017Define how you want firewall to behave, if it is directly connected to the external network then select router mode (recommended) or if it will be connecting behind some firewall then select transparent bridge mode:

Selection_018Complete installation:

Selection_020 A dash board like below will appear after installation is over:


Now go the untangle site, create a user account and provide login details in Login section:


Time to install firewall plugins, a list of available open source version plug-ins as well as trail version plug-ins is available on left had side column, simply click to install required plug-in, all of the installed plug-ins will appear in right had side scree:Instal


Install all applications in same manner, they can be start or stop any time without interrupting users connected to the firewall, health of the Server is  always visible in uppermost panel:


Installation process is over at that state let us explore some of the services:

Define DNS:

Click network -> Click DNS Server -> Add dns server name and ip address -> Click apply. that’s it, now you have a fully working DNS.


Add DHCP range:

Click config -> Click interfaces -> cilick edit in Internal or LAN interface -> scroll down and define DHCP range-> click DHCP, now you have a functions dhcp and dns server or you can put some static entries under DHCP tab available next to DNS tab:

Selection_029 Installation and configuration is over now, explore rest of the part by yourself.


A very lightweight firewall, I have used Untangle firewall even with an old P4 processor, the one thing which make untangle different from other firewalls that GUI admin login interface can be logged in directly to untangle and no remote machine is required.