IPsec там безопасный. Он просто отсутствует, начисто :-)
Date: 2018-04-21 23:26:37 +0200
Remove IPsec and related code from the system.
It was unmaintained ever since we inherited it from FreeBSD 4.8.
In fact, we had two implementations from that time: IPSEC and FAST_IPSEC.
FAST_IPSEC is the implementation to which FreeBSD has moved since, but
it didn't even build in DragonFly.