Configuring IPsec with ipsecctl(8)

net-to-net example

gateway A:
ike esp from 10.0.1.0/24 to 10.0.2.0/24 peer 2.2.2.2

gateway B:
ike esp from 10.0.2.0/24 to 10.0.1.0/24 peer 1.1.1.1