[Bug 265532] fbsd-update 13.0 -> 13.1 and active ipfw (open) rulebase during first reboot during upgrade

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From: <bugzilla-noreply_at_freebsd.org>
Date: Sun, 31 Jul 2022 11:28:55 UTC

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=265532

            Bug ID: 265532
           Summary: fbsd-update 13.0 -> 13.1 and active ipfw (open)
                    rulebase during first reboot during upgrade
           Product: Base System
           Version: 13.1-RELEASE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: pi@FreeBSD.org

I had several cases where an upgrade from 13.0 -> 13.1 with an
active ipfw ruleset:

# firewall, ipfw based
firewall_enable="YES"
firewall_type="OPEN"

caused the host after reboot to loose ipv4 connectivity.

It probably works if one sets firewall_enable to NO before the reboot
with the 13.1 kernel, and enables it after the final fbsd-update install
and does another reboot.

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