Pf Configuration Incompatible With — Pf Program Version

If the kernel version ( -k ) does not match the userland version ( -u ), your system requires a clean reboot to finish applying updates. 3. Clear Stale Kernel Modules

You recently upgraded your OS (e.g., upgrading FreeBSD or OpenBSD to a new major/minor release), and the system is utilizing a new kernel but still pointing to old binaries, or vice versa.

How to Fix "PF Configuration Incompatible with PF Program Version"

Open /etc/pf.conf in a text editor like nano or vi . Locate the lines identified during your diagnostic dry-run and comment them out by adding a # at the beginning of the line. Step 3: Modernize the Syntax pf configuration incompatible with pf program version

Once the configuration validates successfully, safely reload the rules into the live kernel: sudo pfctl -f /etc/pf.conf Use code with caution.

This error happens when the pfctl command-line tool parses a configuration file containing syntax, options, or features that the running kernel's PF module does not support. Why This Error Happens

Fix "PF Configuration Incompatible with PF Program Version" Error If the kernel version ( -k ) does

While OpenBSD, FreeBSD, and macOS all use PF, their implementations have diverged significantly over the years. Copying a pf.conf file directly from a FreeBSD server to a macOS machine without modifying the syntax frequently triggers version incompatibility errors. Step-by-Step Diagnostic Process

If you recently upgraded your kernel via freebsd-update or source compilation, the safest fix is a full reboot:

The scrub directive, used for packet normalization, has undergone significant changes. How to Fix "PF Configuration Incompatible with PF

Administrators should rewrite legacy rules to conform to modern standards.

Fix: "PF Configuration Incompatible with PF Program Version"

Older PF versions used the no filter keyword. Modern versions use received or standard skip rules instead. no filter on eth0 New: set skip on eth0 State Modulation Syntax