CentOS Linux is a Linux distribution is an enterprise OS platform compatible with its source RedHat Enterprise Linux (RHEL). Its end of life was announced for December 2021.
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pfSense
Score 8.9 out of 10
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pfSense is a firewall and load management product available through the open source pfSense Community Edition, as well as a the licensed edition, pfSense Plus (formerly known as pfSense Enterprise). The solution provides combined firewall, VPN, and router functionality, and can be deployed through the cloud (AWS or Azure), or on-premises with a Netgate appliance. It as scalable capacities, with functionality for SMBs. As a firewall, pfSense offers Stateful packet inspection, concurrent…
In any role where you need raw server power, CentOS Linux is extremely well suited. It is extremely stable, and in my experience, probably the most stable of the Linux distros available. It has a very wide base of support from 3rd party sources for additional functionality that do not come already in the CentOS Linux distribution itself. It is not as appropriate for situations that are customer facing or end user facing. For those, I recommend Ubuntu Linux. But for everything server & compute related, I recommend CentOS Linux.
For fast-growing or SME companies, pfSense is quite suitable because pfSense already had many advanced features such as VPN and multiple WAN / LAN. As a result, we just need to pay for expensive router frequently to upgrade our infrastructure.
pfSense is an excellent firewall - It logs all of your traffic. It has packages you can install to snort bad traffic.
pfSense has a tool called "p0f" which allows you to see what type of OS is trying to connect to you. You can filter these results and you can also block a specific OS from connecting to you.
pfSense is an excellent load-balancer: (Multi-WAN and Server Load Balancing) The fail-over/aggregation works very well. This is perfect if your business uses multiple ISP's to ensure your customers are always able to access their data. Also helps with bandwidth distribution as well.
VPN's - I am not entirely sure if this package was free with pfSense, but it does offer the ability to use OpenVPN which is what I am familiar with.
They also have IPsec in the settings as well, but I am not familiar with that enough to go into any detail with it.
As I mentioned I do use OpenVPN the only thing I don't care for with it is I can create OpenVPN configs for each user I want to be able to VPN into the network and I assumed each one would be "unique" but this does not seem to be the case. I could be doing it wrong, but if I create a config for a specific employee I would expect only that employee should be able to use that config, but I have been able to login to everyone that I made using my credentials.
I mentioned earlier that pfSense had a GUI.
I personally really think it is cool because it has a bunch of reporting graphs for monitoring your networks. I think when I become the full-time admin at the company I am going to try to talk them into getting me a TV I can mount on the wall and display all the graphs and real-time info pfSense shows so I can monitor what is going on with the network(s) at all times. Plus I think it would look rad.
There is no API for making changes. This can be a hindrance in environments where auto-deploying something needs firewall rules or HAProxy configs updated. Since all settings are stored in an XML file and then configs are generated from that, even manually updating config files cannot be done.
Beware that some network cards can have issues. pfSense is based on FreeBSD, so it's best to look on their compatibility list before deploying.
Again, written documentation is excellent, even on the older versions. The support community is the best. It is comprehensive and I would say that it global because it transcends national boundaries. Also, you find all types of people using CentOS to do all sorts of things so you are bound to find someone to talk to if there are problems.
CentOS is based on RHEL, so it really came down to the costs when making the selection between our options. RHEL offered more support and features, but nothing that we specifically needed. CentOS is fully customizable, something Windows Server was also lacking in many ways. The stability and speed was unmatched in comparison to Windows, and we were not utilizing any Windows-specific software to require us to use the Microsoft alternative. My years of experience have also made it a breeze to set up and configure new CentOS instances, leading me to stay where I'm comfortable.
Before pfSense we were using consumer and small business rated network appliances from Linksys, Cisco, Buffalo and Netgear. We were replacing them on average of every 6-12 months because they'd fail or would offer poor wifi availability. Switching to pfSense allowed us to use professional grade switches and wifi access points, offloading all of the services that the consumer grade products took care of, onto pfSense (DHCP, DNS, routing, firewall, VPN, etc).
CentOS's support of RPM packages makes it very easy to replicate RHEL servers for development or testing in cheap / free environments
CentOS's minimalistic desktop environment requires additional tweaking / packages if you want to have a usable desktop environment with the niceties of other modern distributions. As a result, if developers want to use CentOS, they'll need to spend more time customizing it than other distros.
CentOS's easy customization from the command line lends itself well to our virtualization infrastructure where setup can be easily scripted to modify CentOS's configuration files.
Moving to a FWaaS solution installed on a decent computer the initial investment was moderate to cover 50 to 250 users, but still being cheaper that a Fortinet, Cisco ASA, or a Sophos UTM.
Paying only for support can be a double edge knife, cause you need to identify what's the goal of the request, or your drown into a an endless list of requirements.
To stay in the top with the half of a regular investment pFSense gives a wide variety of plugins that will give you a deep knowledge of your security flaws and strong points.
