iface lo inet static
    address 193.31.7.1/24
iface lo inet6 static
    address 2a02:158:ffff:deb::1/64

# debian
iface lo inet static
    address 193.31.7.2/24
iface lo inet6 static
    address 2a02:158:ffff:deb::2/64

# security
iface lo inet static
    address 193.31.7.3/24
iface lo inet6 static
    address 2a02:158:ffff:deb::3/64