pfSense vs OPNsense: Keep pfBlockerNG or Migrate?

pfBlockerNG does not run on OPNsense. It is a pfSense package, and the official OPNsense plugins repository has no port of it. On OPNsense you rebuild the same policy from separate parts: Unbound DNS blocklists replace DNSBL, URL Table and GeoIP aliases replace IP and country feeds, and the CrowdSec plugin adds collaborative reputation blocking.

For an existing pfBlockerNG homelab, that rebuild is the real cost of switching. Stay with pfSense when its working package configuration and operational familiarity meet your needs. Evaluate OPNsense when you have a specific requirement worth the rebuild and verification work.

Is pfBlockerNG available for OPNsense?

No. Netgate documents pfBlocker-NG as an enhanced alias table feature for pfSense software, and the OPNsense plugin list carries no pfBlockerNG entry, so nothing installs it on OPNsense. Each policy the package enforced has a native counterpart that you configure on its own:

None of these reads a pfBlockerNG configuration. Treat the table as a map for the rebuild below, not a converter.

OPNsense vs pfSense at a glance (October 2026)

Both are FreeBSD-based firewalls with a no-cost edition and a paid tier. For a pfBlockerNG user, the difference that matters is where blocking lives: pfSense adds it through a package, while OPNsense builds DNS blocklists into Unbound. Versions and prices below were checked against vendor pages in October 2026.

Netgate prices Plus by support tier, and Business Edition adds extras such as the integrated GeoIP database. Neither paid tier is required to replace pfBlockerNG. The pfSense Plus vs CE breakdown covers what Plus changes on the pfSense side.

Inventory what pfBlockerNG actually does

Netgate’s package list describes pfBlockerNG as managing IPv4/v6 list sources and providing domain name (DNSBL) blocking via the Unbound DNS Resolver. Those are separate controls, even when one package manages them.

Before considering a replacement, record the DNSBL feed URLs, domain exceptions, IP lists, country selections, update schedules and rule directions. Also record how clients reach DNS: DHCP settings, any redirects, resolver access lists and managed encrypted-DNS settings.

Use the pfBlockerNG setup guide to review the DNS side and the GeoIP and IP-feed guide for packet filtering. A large blocked-domain count alone is not a migration requirement; the intended policy and necessary exceptions are.

Map features to configuration you can verify

This table is an editorial migration checklist, not a claim that every feature maps to a matching button. A replacement deserves acceptance only after it reproduces the required behavior.

Rebuild pfBlockerNG’s DNSBL in OPNsense Unbound

OPNsense’s Unbound manual documents resolver access, host overrides and DNS blocklist controls. That can address a DNS-filtering requirement, but it does not mean a pfBlockerNG configuration has been imported.

Review supported list formats and how exceptions apply, then recreate a small, understood set of feeds first:

1. Open Services > Unbound DNS > Blocklists, tick Enable, and choose predefined sources that match your old feeds. The list includes AdGuard, AdAway, EasyList, EasyPrivacy, OISD, hagezi and the Abuse.ch ThreatFox IOC database.
2. Add remaining feeds under URLs of Blocklists. Only plain-text files of FQDNs or wildcard entries such as *.example.com are supported, so check each pfBlockerNG feed’s format before copying it across.
3. Move pfBlockerNG exceptions into Allowlist Domains. Entries are patterns: the manual’s example .*.nl exempts every .nl domain.
4. Put explicit blocks in Blocklist Domains, where regular expressions are not supported, and parent-domain blocks in Wildcard Domains. Wildcard-blocking a first-level domain such as com is not supported.
5. For different filtering per VLAN, create one policy per network with its own Source Net(s). Where policies overlap, the most specific subnet wins.
6. Keep the default 0.0.0.0 answer, or tick Return NXDOMAIN for clients that cannot cope with it; the manual names certain Apple devices.
7. Add a cron task under System > Settings > Cron that runs Update Unbound DNSBLs.

Changes apply without restarting Unbound, although the manual allows up to a minute before new lists load. Then verify a permitted domain, a deliberately blocked domain and an internal hostname from each relevant client network. The built-in Blocklist Tester checks only local policies and cannot follow CNAMEs; for those, the manual points to Interfaces > Diagnostics > DNS Lookup or drill -b <source ip> <domain> <record type>.

Replace pfBlockerNG IP and GeoIP lists with aliases

Treat IP reputation and country filtering separately from DNS. A resolver answer does not prove that an IP-layer restriction exists. Keep the old configuration inventory available so a missing control is visible before the replacement becomes the gateway.

On OPNsense, a URL Table (IPs) alias downloads a list of one IPv4 or IPv6 address per line and refetches it on the alias’s Refresh frequency. A plain URL (IPs) alias is fetched only once, so reserve it for static lists. Reference each alias in a block rule on the interface and direction you recorded. If a large feed overflows its table, raise Firewall Maximum Table Entries under Firewall > Settings > Advanced; the manual notes the full IPinfo GeoIP dataset is about 7 million entries.

Country blocking needs a data source first. For MaxMind, the OPNsense GeoIP how-to has you create a MaxMind account, generate a license key, and paste the GeoLite2-Country-CSV download URL containing that key into the GeoIP settings tab under Firewall > Aliases. Business Edition includes an integrated GeoIP database instead. Then build a GeoIP alias from individual countries or whole regions and use it in your rules.

pfBlockerNG alternatives on OPNsense

The closest pfBlockerNG alternative on OPNsense is the built-in pair above: Unbound blocklists for domains and aliases for IP and country lists. The other options add different kinds of blocking rather than replacing that pair.

CrowdSec installs from System > Firmware > Plugins and deploys three packages: os-crowdsec, crowdsec and crowdsec-firewall-bouncer. Its documentation warns against starting those services from the shell, because the plugin manages them. Zenarmor provides application control and web filtering, and has a free edition supported through the OPNsense forum. Neither reads a pfBlockerNG feed list, so plan them as additions, not drop-in replacements.

pfBlockerNG vs Pi-hole

pfBlockerNG filters both DNS and IP traffic on the pfSense box itself. Pi-hole is a DNS sinkhole on a separate Linux host, so it blocks domains for every client that uses it but leaves IP and country blocking to the firewall. Pick Pi-hole when you want one DNS filter that survives a move between pfSense and OPNsense.

Pi-hole’s prerequisites list 512MB of RAM and at least 2GB of free disk, with 4GB recommended, on a supported OS such as Debian, Ubuntu, Fedora, Alpine or Raspberry Pi OS. It needs port 53 over TCP and UDP, and port 67 only if it also serves DHCP. On either firewall, hand clients the Pi-hole address through DHCP. If you keep filtering on the firewall instead, size that box with the pfSense hardware requirements.

Check VPN dependencies before switching platforms

WireGuard on pfSense is an installable, kernel-based package on CE and Plus, as described in Netgate’s WireGuard documentation. The pfSense WireGuard setup guide lists which CE and Plus releases carry it.

If you use pfSense Plus OpenVPN DCO, record that explicitly. Netgate’s DCO documentation makes it a Plus-specific endpoint feature with compatibility constraints. Do not assume another platform or a different OpenVPN mode has identical resource use.

The pfSense DCO versus WireGuard comparison explains those dependencies. During migration, verify authentication, DNS, routes and the return path before comparing throughput.

Rebuild inspection policy deliberately

OPNsense documents its Suricata integration in the IDS/IPS manual. pfSense supplies inspection through packages. A shared engine does not imply identical interface placement, rule selection or suppression configuration.

Record which interfaces are inspected and why. Preserve the difference between alerting and blocking, and review false-positive exceptions instead of copying them without context. The Snort versus Suricata guide covers the pfSense-side engine decision.

A migration is also a reasonable time to remove a package you no longer need. Do that as an explicit policy change, rather than accidentally dropping a control while rebuilding the gateway.

Preserve VLAN policy and a rollback path

Keep a network inventory of VLAN IDs, addresses, DHCP ranges, aliases and permitted inter-network services. The pfSense VLAN setup guide provides a concrete example of the checks that matter.

Use Netgate’s backup and recovery procedures to retain an encrypted configuration export and a way to restore the original pfSense installation. This is your pfSense recovery path, not an assumption of cross-platform configuration compatibility.

On the replacement, verify management access and basic connectivity first. Then check DNS, VPN access and each restricted network from representative clients. Keep the original gateway available until the replacement passes the requirements you recorded.

When staying with pfSense is reasonable

A functioning pfBlockerNG setup, a known recovery process and staff familiarity are practical reasons to stay. A platform change should solve a named problem that outweighs migration effort. Conversely, familiarity alone should not prevent evaluation when required functionality or support arrangements no longer fit.

Make that decision from current documentation and your dependency inventory. Broad claims about interface speed, guaranteed patch timing or a universal VPN performance winner do not tell you whether your particular configuration will survive the move.

FAQ

is opnsense better than pfsense for a homelab?

Neither is better in general. OPNsense suits a homelab that wants DNS blocklists built into Unbound and two scheduled major releases a year. pfSense CE suits one already running pfBlockerNG, Snort or Suricata packages and a tested recovery process. Choose the platform whose rebuild cost you can verify against your inventory.

is pfsense free compared to opnsense?

Both have no-cost editions. Netgate lists pfSense CE at no charge, and OPNsense publishes its open source Community Edition as a direct download. Paid tiers differ: pfSense Plus with TAC Lite costs $129 per instance per year, and an OPNsense Business Edition license costs €149 per year, both checked in October 2026.

how often should opnsense blocklists update?

Once a day is enough. OPNsense’s Unbound manual says remote blocklists rarely change more often than daily and recommends a cron job running “Update Unbound DNSBLs” at that interval, added under System > Settings > Cron. URL Table aliases for IP feeds refresh separately, using the Refresh frequency you set on each alias.

is pfsense or untangle better for a home network?

For most homelabs, pfSense CE is the easier choice because Netgate lists it as open source at no charge. Untangle became an Arista Networks subsidiary in March 2022, and NG Firewall now carries the Arista Edge Threat Management name. Arista’s last order date for NG Firewall Q Series appliances was June 30, 2026.

can you run pi-hole and pfblockerng together?

Yes, as long as each has a clear job. One workable split gives Pi-hole all DNS filtering and keeps pfBlockerNG for IP and GeoIP lists only, with DHCP handing clients the Pi-hole address. Running two DNS blocklists in series means two logs to search whenever a site breaks, so disable one DNS layer after verifying the other.