For testing purposes, I want to setup an ipsec tunnel using IKEv1 or v2 (preferably v2) that does not require any authentication - so just using the protocol to agree on the secret-keys of the ipsec tunnel and skipping the authentication.
Is such an option even supported by the IKEv1 or v2 protocol? If so, how can I enable that in strongswan (what value do I need to set for leftauth and rightauth to enable this?)
