3 ms·

I know that it is not. Their common ancestor was BSD 4.3 Reno. And for pfSense and OPNsense common ancestor was m0n0wall.

• gonzo 8y ago
  > And for pfSense and OPNsense common ancestor was m0n0wall. pfSense forked m0n0wall Opnsense forked pfSense.
  • sjwright 8y ago
    At some point, everyone forked everyone, but all the code was written by communities under open licenses, so the distinction is entirely political.