IPSec между Zyxel Zywall 1050 и Mikrotik

zywall USG VPN Gateway (Phase 1 (фаза 1)) = mikrotik ipsec Peer (Phase 1 (фаза 1))
zywall USG VPN L2TP (Phase 2 (фаза 2)) = mikrotik Policy and Proposal (Phase 2 (фаза 2))

Diffie-Hellman Group Name Reference
Group 1 768 bit MODP group RFC 2409
Group 2 1024 bits MODP group RFC 2409
Group 3 EC2N group on GP(2^155) RFC 2409
Group 4 EC2N group on GP(2^185) RFC 2409
Group 5 1536 bits MODP group RFC 3526