Freedom251 › Firewall Software
IPFW
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| IPFW | FreeBSD firewall utility; no paid plans stated | Free |
As man.freebsd.org lists them, read 11 Oct 2026. The maker's own page has the final word.
Facts from IPFW's own pages
- Availability
- FreeBSD is available free of charge with source code. · freebsd.org, 11 Oct 2026
- Configuration files
- Rules may be read from a file and optionally piped through a preprocessor such as cpp or m4. · man.freebsd.org, 11 Oct 2026
- Connection alerts
- Yes · man.freebsd.org, 22 Sept 2026
- Filtering
- Rules can filter on IPv4 and IPv6 protocols, addresses and ports, direction, interfaces, IP and TCP header fields, and other packet attributes. · man.freebsd.org, 11 Oct 2026
- Free plan
- Yes · man.freebsd.org, 22 Sept 2026
- Logging
- Matching packets can be logged to syslog, the ipfw0 pseudo-interface, or a routing socket. · man.freebsd.org, 11 Oct 2026
- NAT
- The utility supports in-kernel NAT and stateful or stateless IPv6/IPv4 translation, including NAT64 and CLAT. · man.freebsd.org, 11 Oct 2026
- Operational caution
- The manual warns that a mismatch between the userland world and kernel can break the ipfw ABI and prevent adding rules, potentially affecting booting. · man.freebsd.org, 11 Oct 2026
- Outbound control
- advanced · man.freebsd.org, 22 Sept 2026
- Platform
- IPFW is documented as a FreeBSD system utility; the FreeBSD project provides images for supported architectures and cloud vendors. · man.freebsd.org, 11 Oct 2026
- Supported platforms
- FreeBSD · man.freebsd.org, 22 Sept 2026
- Project
- FreeBSD is developed and maintained by a large community. · freebsd.org, 11 Oct 2026
- Purpose
- ipfw is the user interface for controlling the FreeBSD firewall, dummynet traffic shaper and packet scheduler, and in-kernel NAT services. · man.freebsd.org, 11 Oct 2026
- Rule direction
- both · man.freebsd.org, 22 Sept 2026
- Rule management
- Rules can be organized into 32 sets that can be enabled, disabled, swapped, or moved for ruleset manipulation. · man.freebsd.org, 11 Oct 2026
- Stateful firewall
- Rules using keep-state, record-state, limit, or set-limit can create dynamic rules for stateful behavior. · man.freebsd.org, 11 Oct 2026
- Traffic shaping
- The dnctl pipe, queue, and sched commands configure traffic shaping and packet scheduling. · man.freebsd.org, 11 Oct 2026
Where IPFW stands on Freedom251
- Firewall Software#27 of 81
- Server Virtualization Software#8 of 22