flow esp out from ::1 to ::2 peer ::2 type require
flow esp in from ::2 to ::1 peer ::2 type require
flow esp out from ::1 to ::3 peer ::3 type require
flow esp in from ::3 to ::1 peer ::3 type require
flow esp out from 1.1.1.1 to 2.2.2.2 peer 2.2.2.2 type require
flow esp in from 2.2.2.2 to 1.1.1.1 peer 2.2.2.2 type require