Pf Configuration Incompatible With Pf Program Version ★

which pfctl pfctl -V Compare this with the kernel module version:

If you are a network administrator, security engineer, or FreeBSD enthusiast, encountering the error message "pf configuration incompatible with pf program version" can be a frustrating roadblock. This error typically appears when you attempt to load or manipulate a Packet Filter (pf) firewall ruleset, only to have the system reject your configuration. pf configuration incompatible with pf program version

A: Yes, if you use the pf kernel module on Linux (e.g., via Gentoo or pfSense's underlying FreeBSD heritage). The same principle applies. which pfctl pfctl -V Compare this with the

freebsd-version -kru | uniq Or for OpenBSD: The same principle applies

freebsd-update fetch freebsd-update install # Reboot shutdown -r now # After reboot, update packages pkg update && pkg upgrade

sysctl kern.version You are looking for discrepancies between the -k (kernel) and -u (userland). If they differ, you have found the culprit. Many systems have multiple pfctl binaries. Use which and version checks:

sysctl net.pf.version If the numbers do not match, you have a mismatch. PF caches a compiled binary ruleset, often in /var/db/pf.conf.db or /etc/pf.conf.db . This binary file is version-specific. If this file was created by a newer pfctl and the kernel attempts to read it at boot, you will see the error. Step-by-Step Solutions The solution depends on your specific environment. Choose the path that applies to you. Solution 1: Full System Upgrade (Recommended) If you recently upgraded the kernel without updating userland, perform a complete upgrade.