Firewall under the hood

Started by Pressure, March 07, 2025, 04:56:29 PM

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March 07, 2025, 04:56:29 PM
Hi, been searching but can't quite tell which firewall that Opnsense uses under the hood.
Which firewall is used?
  • PW
  • IPFW
  • IPtables

    If several are supported then tell which is primary.
March 07, 2025, 05:05:32 PM #1
pf for the firewall
ipfw for the shaper

IPtables is Linux - OPNsense is built on FreeBSD.

What's pw?
Deciso DEC750
People who think they know everything are a great annoyance to those of us who do. (Isaac Asimov)
March 07, 2025, 06:46:51 PM #2
Quote from: Patrick M. Hausen on March 07, 2025, 05:05:32 PMpf for the firewall
ipfw for the shaper

IPtables is Linux - OPNsense is built on FreeBSD.

What's pw?

PW - Well that's a typo :p

Yes i know iptables is linux, but according to the freebsd manual it's supported so i thought it might be under the opnsense fork as well.

And Thank you for answer, now I'm gonna try to learn as much as i can about the PF firewall
March 07, 2025, 07:21:25 PM #3
Quote from: Pressure on March 07, 2025, 06:46:51 PMiptables is linux, but according to the freebsd manual it's supported

Please provide a link to the source. Thank you.
Deciso DEC750
People who think they know everything are a great annoyance to those of us who do. (Isaac Asimov)
March 07, 2025, 07:56:57 PM #4
Quote from: Pressure on March 07, 2025, 06:46:51 PMYes i know iptables is linux, but according to the freebsd manual it's supported so i thought it might be under the opnsense fork as well.

Maybe you are referring to "IPFILTER", the 3rd of the FreeBSD firewalls?

"FreeBSD has three firewalls built into the base system: PF, IPFW, and IPFILTER, also known as IPF"
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