Report

Should I Use OPNsense?

opnsense.org·Analyzed 9 hours ago·9/20/2026·Based on 12 sources

Free, open-source FreeBSD firewall/router with commercial-grade features, backed by Deciso B.V.

Depends

Depends

Buy it if you have networking skills and want enterprise firewall features without license fees.

Free commercial-grade firewall: powerful and cheap, but needs tech skill, dedicated hardware and prompt patching.

Confidence: Medium

Free

Starting price

Community edition, full core features

€447

Business Edition

3-year license

2

2026 RCE CVEs

Authenticated RCEs, fixed in 26.1.x

Deciso B.V.

Backed by

Founded the OPNsense project

Value for money

5

Free core; paid tier cheap vs commercial firewalls

Ease of use

3

Slick UI praised, but steep for beginners

Feature depth

5

VPN, IDS/IPS, routing rival commercial firewalls

Support quality

3

Community forums; real support needs paid edition

Security posture

2

Two 2026 authenticated RCE CVEs; patch fast

Pros

Free community edition includes commercial-grade firewall, VPN, and IDS/IPS^¹
Users report stable, reliable long-term operation^⁶
Sleek web UI; switchers from pfSense report happy upgrades^³
Update quality has 'improved dramatically' per long-time reviewers¹⁰
Users praise affordable pricing versus commercial firewalls

Cons

One former user calls it 'a complicated mess of a system'^⁴
Two authenticated RCE vulnerabilities disclosed in 2026^⁷
Scanners flagged lingering CVEs for months after updates
Requires dedicated hardware, setup skill, and constant updates
Business Edition support costs €447 per three years^²

Gotchas

highInternet-facing firewall must be patched fast; pre-26.1.8 had authenticated RCE^⁷
mediumFree edition means community support only; SLAs require paid Business Edition¹¹
mediumSecurity scanners may report unrelated CVEs for months
mediumMigration is manual; users blog about leaving over configuration complexity^⁴

Best for

Homelab builders
SMBs wanting enterprise firewall features free
pfSense defectors
VPN/VLAN/IDS-heavy networks

Not for

Anyone wanting plug-and-play Wi-Fi
Offices with no IT admin
Teams that skip security updates
Buyers needing vendor SLA without paying

Pricing

Community Edition

Free

Full firewall, VPN, IDS/IPS
Community support

Business Edition (3Yr)

€447

Professional support from Deciso
Business repository updates

Security

Actively patched open-source firewall; two authenticated RCE CVEs disclosed and fixed in 2026 releases.

CVE-2026-44194Authenticated remote code execution, versions prior to 26.1.8^⁷
CVE-2026-44193Remote code execution via XMLRPC^⁸
GHSA-f59w-m967-9rf6Authenticated RCE in user management, disclosed via GitHub advisory^⁹

What users say

Long-term users praise stability and value, while some defectors find it overly complex to configure and maintain.

“OPNSense is a complicated mess of a system”

— Blog, ramble.moe

“Things have improved dramatically. You no longer have to worry about upd…”

— Lawrence Systems forum

“OPNsense is stable in my experience and has been reliab…”

— AWS Marketplace review

Alternatives

Compare OPNsense with each alternative.

pfSense

The other big BSD firewall; similar power, different vendor.

OPNsense vs pfSense

IPFire

Simpler open-source firewall alternative, endorsed by XDA reviewers.

OPNsense vs IPFire

OpenWrt

Lighter router OS for home devices and small networks.

OPNsense vs OpenWrt

VyOS

CLI-first network OS for engineers who outgrow web UIs.

OPNsense vs VyOS

Full analysis

Based on 30+ public sources: reviews, forums, official docs, pricing pages, and CVE databases. Some review snippets truncated.

Sources

OPNsense official siteopnsense.org
official
OPNsense Shop — Software & Licensesshop.opnsense.com
official
I switched from pfSense to OPNsense (XDA)xda-developers.com
review
Moving Away From OPNsense (ramble.moe)ramble.moe
review
Long-Term Experiences for OPNsense (Reddit)reddit.com
review
OPNsense AWS Marketplace reviewsaws.amazon.com
review
CVE-2026-44194 — NVDnvd.nist.gov
security
CVE-2026-44193 — SentinelOnesentinelone.com
security
RCE advisory — GitHubgithub.com
security
OPNSense real world feedback — Lawrence Systemsforums.lawrencesystems.com
review
OPNsense Support Options (official docs)docs.opnsense.org
official
OPNsense reviews — PeerSpotpeerspot.com
review

Rate this review

Anonymous. You can change your vote.

Loading votes…

Comments

One queue. No nested comments. Give a display name first. Limit: 200 words per comment and 7 comments per day. You can edit or delete yours.

No comments yet.

Depends

Buy it if you have networking skills and want enterprise firewall features without license fees.

Who it's for

Homelab builders
SMBs wanting enterprise firewall features free
pfSense defectors
VPN/VLAN/IDS-heavy networks

Who it's not for

Anyone wanting plug-and-play Wi-Fi
Offices with no IT admin
Teams that skip security updates
Buyers needing vendor SLA without paying

Gotchas

Internet-facing firewall must be patched fast; pre-26.1.8 had authenticated RCE⁷
Free edition means community support only; SLAs require paid Business Edition¹¹
Security scanners may report unrelated CVEs for months
Migration is manual; users blog about leaving over configuration complexity⁴

Pricing notes

Community Edition: Free — Full firewall, VPN, IDS/IPS; Community support
Business Edition (3Yr): €447 — Professional support from Deciso; Business repository updates

Key capabilities

Free — Starting price (Community edition, full core features)
€447 — Business Edition (3-year license)
2 — 2026 RCE CVEs (Authenticated RCEs, fixed in 26.1.x)
Deciso B.V. — Backed by (Founded the OPNsense project)
Value for money: 5/5. Free core; paid tier cheap vs commercial firewalls
Ease of use: 3/5. Slick UI praised, but steep for beginners
Feature depth: 5/5. VPN, IDS/IPS, routing rival commercial firewalls
Support quality: 3/5. Community forums; real support needs paid edition
Security posture: 2/5. Two 2026 authenticated RCE CVEs; patch fast

Security notes

Actively patched open-source firewall; two authenticated RCE CVEs disclosed and fixed in 2026 releases.

CVE-2026-44194. Authenticated remote code execution, versions prior to 26.1.8⁷
CVE-2026-44193. Remote code execution via XMLRPC⁸
GHSA-f59w-m967-9rf6. Authenticated RCE in user management, disclosed via GitHub advisory⁹

What to use instead

pfSense — The other big BSD firewall; similar power, different vendor. https://www.pfsense.org
IPFire — Simpler open-source firewall alternative, endorsed by XDA reviewers. https://www.ipfire.org
OpenWrt — Lighter router OS for home devices and small networks. https://openwrt.org
VyOS — CLI-first network OS for engineers who outgrow web UIs. https://vyos.io

Sources

1.OPNsense official site https://opnsense.org
2.OPNsense Shop — Software & Licenses https://shop.opnsense.com/product-categorie/software_and_licenses/
3.I switched from pfSense to OPNsense (XDA) https://www.xda-developers.com/i-switched-from-pfsense-to-opnsense-and-im-happy-with-the-upgrade/
4.Moving Away From OPNsense (ramble.moe) https://ramble.moe/posts/moving-away-from-opnsense---a-story-of-simplicity/
5.Long-Term Experiences for OPNsense (Reddit) https://www.reddit.com/r/OPNsenseFirewall/comments/zar5md/longterm_experiences_for_opnsense/
6.OPNsense AWS Marketplace reviews https://aws.amazon.com/marketplace/reviews/reviews-list/prodview-lu5v2tokic3py
7.CVE-2026-44194 — NVD https://nvd.nist.gov/vuln/detail/CVE-2026-44194
8.CVE-2026-44193 — SentinelOne https://www.sentinelone.com/vulnerability-database/cve-2026-44193/
9.RCE advisory — GitHub https://github.com/opnsense/core/security/advisories/GHSA-f59w-m967-9rf6
10.OPNSense real world feedback — Lawrence Systems https://forums.lawrencesystems.com/t/opnsense-real-world-feedback/10558
11.OPNsense Support Options (official docs) https://docs.opnsense.org/support.html
12.OPNsense reviews — PeerSpot https://www.peerspot.com/products/opnsense-reviews