Administrator Information > Advanced Security Settings > Encrypted Communication Using IPsec/IP Filtering IKE Version Select IKEv1 or IKEv2 for IKE Version . Select one of them according to the device that the scanner is connected to. ❏ IKEv1 The following items are displayed when you select IKEv1 for IKE Version . 225 Items Settings and Explanation Authentication Method If you select IPsec for Access Control, select an option. Used certificate is common with a default policy. Pre-Shared Key If you select Pre-Shared Key for Authentication Method, enter a pre-shared key between 1 and 127 characters. Confrim Pre-Shared Key Enter the key you configured for confrimation.