To sign in, use your existing MySonicWall account. To create a free MySonicWall account click "Register".
When setting up a site to site VPN, a choice for "Peer IKE ID" is "Key Identifier"
What is a "Key Identifier"
simple answer is : If you have HQ Firewall and deploy a lots of S2S vpns on the same public ip, Your HQ Firewall match the rule with key identifier strings on the rules.