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OPNsense pros and cons

Vendor: OPNsense
4.1 out of 5

Pros & Cons summary

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Prominent pros & cons

PROS

OPNsense is appreciated for its affordability and open-source nature, providing cost-effective solutions.
It offers a straightforward VPN connection setup, making it more user-friendly compared to other options.
OPNsense supports high availability and advanced features like Dual WAN capabilities.
The tool includes powerful network intrusion detection and prevention systems, reducing network attacks significantly.
Its firewall, VPN, and DNS-level filtering functionalities are highly valued for security and management.

CONS

OPNsense has issues with stability and reliability, as it can sometimes freeze often, especially the interfaces.
There is a steep learning curve, and users need additional training before effectively using OPNsense.
OPNsense lacks integration capabilities with virtual servers and struggles with large-scale deployments.
The performance of OPNsense can be improved as it struggles to handle large volumes of voice traffic.
There is a lack of clear documentation and technical documentation, making it difficult to navigate many options.
 

OPNsense Pros review quotes

AB
CIO at a tech vendor with 1-10 employees
Jun 27, 2019
We can open a new VPN connection easily. It's much easier than with Fortinet in our experience.
EA
Founding Partner, General Manager at emsteknoloji
Jul 4, 2019
I find the solution to be user-friendly. It has a lot of reports and easy settings.
FD
System Administration Specialist at a tech vendor with 1-10 employees
Mar 4, 2020
The graphic user interface is very good and it is user-friendly which makes the product easy-to-use.
Learn what your peers think about OPNsense. Get advice and tips from experienced pros sharing their opinions. Updated: March 2026.
884,933 professionals have used our research since 2012.
FK
Support Engineer at Techaccess Pakistan
Mar 9, 2020
The solution is good for a basic firewall for a small business or for home use.
reviewer1333986 - PeerSpot reviewer
Vice President at a consultancy with 51-200 employees
Apr 30, 2020
The interface and the dashboard are the most valuable features of this solution.
YaserAljohani - PeerSpot reviewer
OT/ICS Information Security Specialist at SANS
Jun 25, 2020
The most valuable features in OPNsense are reporting and visibility.
CA
Owner at Networks srl
Oct 13, 2020
The VPN server feature is the most valuable. It is integrated with Radius and AAA for doing accounting and authentication. Insight view is also an important feature for me at this time. It allows me to assess our network traffic. I also like the firewall feature. The BSD kernel has a packet filter. It is one of the most solid frameworks for firewalls. Its user interface is one of the best interfaces I have used.
HP
Senior Network Architect at Virtua Technologies
Jan 14, 2021
The most valuable features are reporting, the Sensei plugin, and firewall capabilities.
reviewer1591197 - PeerSpot reviewer
Director at a comms service provider with 11-50 employees
Jun 3, 2021
We have found pretty much all the features of the solution to be valuable.
reviewer1372230 - PeerSpot reviewer
Cloud and Infrastrcture manager at a tech services company with 11-50 employees
Jul 22, 2021
OPNsense is easy to scale when running on the hardware.
 

OPNsense Cons review quotes

AB
CIO at a tech vendor with 1-10 employees
Jun 27, 2019
OPNsense showed me some problems when using it in different environments. The problem is integration with a virtual server.
EA
Founding Partner, General Manager at emsteknoloji
Jul 4, 2019
On the customer-side, because I'm a small business, I need a cheaper or free solution option.
FD
System Administration Specialist at a tech vendor with 1-10 employees
Mar 4, 2020
The ability to set the VPN IP address would be a welcome addition.
Learn what your peers think about OPNsense. Get advice and tips from experienced pros sharing their opinions. Updated: March 2026.
884,933 professionals have used our research since 2012.
FK
Support Engineer at Techaccess Pakistan
Mar 9, 2020
The solution would not be suitable for anything large-scale.
reviewer1333986 - PeerSpot reviewer
Vice President at a consultancy with 51-200 employees
Apr 30, 2020
There should be more technical documentation.
YaserAljohani - PeerSpot reviewer
OT/ICS Information Security Specialist at SANS
Jun 25, 2020
There are issues with stability and reliability.
CA
Owner at Networks srl
Oct 13, 2020
The only thing that I would like to see improved is the Insight or the NetFlow analysis part. It would be good to have the possibility to dig down on the Insight platform. Right now, we can easily do only a few analyses. If this page becomes more powerful, it surely will be a well-adopted platform.
HP
Senior Network Architect at Virtua Technologies
Jan 14, 2021
I would like to see better SD-WAN performance.
reviewer1591197 - PeerSpot reviewer
Director at a comms service provider with 11-50 employees
Jun 3, 2021
The solution could be more secure.
reviewer1372230 - PeerSpot reviewer
Cloud and Infrastrcture manager at a tech services company with 11-50 employees
Jul 22, 2021
The interface needs to be simplified. It is not user-friendly.