OK, so if I specify a Group Name in iOS, the request becomes aggressive. It still fails at:
May 10 12:06:15 charon: 06[IKE] <15> found 1 matching config, but none allows XAuthInitPSK authentication using Aggressive Mode
May 10 12:06:15 charon: 06[CFG] <15> looking for XAuthInitPSK peer configs matching 192.168.XX.XXX…70.196.XXX.XXX[VPN]
From VPN: IPsec: Edit Phase 1: Mobile Client - Phase 1 Proposal:
Authentication method - Mutual PSK & Xauth
Negotiation mode - Aggressive
My Identifier - My IP Address
Peer Identifier - Distinguished Name - VPN
Pre-Shared Key - XXX
What am I missing?