Pf Configuration Incompatible With Pf Program Version _hot_ Here

Guide: Fixing “pf configuration incompatible with pf program version”

This guide shows how to diagnose and resolve the error message: "pf configuration incompatible with pf program version" on systems using pf (Packet Filter) such as OpenBSD, FreeBSD, NetBSD, or macOS. Follow the steps in order; copy/paste commands as needed. Assumes you have root/administrator access.

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

6. Common Misconceptions

• “My pf.conf has a syntax error.” – No. This error occurs before syntax parsing. It is an API mismatch, not a rule syntax issue.
• “Rebooting is always required.” – On FreeBSD, you can kldunload/kldload the module if you know the correct path. But a reboot is safer and ensures all dependencies (pflog, pfsync) are correct.
• “This only happens on FreeBSD.” – False. It occurs on any OS with loadable PF kernel modules, including macOS (less frequent but possible).

Option C: Disable PF and use alternative (temporary)

pfctl -d

: Ensure your system is fully patched to the latest supported minor version (e.g., upgrading from 14.1 to 14.3) to align the userland tools with the kernel. 2. Test Configuration Syntax

5. Migration Strategies

To resolve version incompatibility, a configuration migration strategy is required.

Test load

pfctl -f /etc/pf.current.rules

Incorrect Binary Path: You might be running an older version of pfctl located in a local directory (e.g., /usr/local/sbin) instead of the system default version.

program resides in "userland." If the kernel is updated to a newer version that changes the