Administrator Information > Advanced Security Settings > Encrypted Communication Using IPsec/IP Filtering Security Protocol If you select IPsec for Access Control , select an option. Algorithm Settings It is recommended that you select Any for all settings or select an item other than Any for each setting. If you select Any for some of the settings and select an item other than Any for the other settings, the device may not communicate depending on the other device that you want to authenticate. Combination of Local Address (Scanner) and Remote Address(Host) on Group Policy 227 Items Settings and Explanation Transport Mode If you only use the scanner on the same LAN, select this.
IP packets of layer 4 or later are encrypted. Tunnel Mode If you use the scanner on the Internet-capable network such as IPsec-VPN, select this option. The header and data of the IP packets are encrypted. Remote Gateway(Tunnel Mode): If you select Tunnel Mode for Encapsulation, enter a gateway address between 1 and 39 characters. Items Settings and Explanation ESP Select this to ensure the integrity of an authentication and data, and encrypt data. AH Select this to ensure the integrity of an authentication and data. Even if encrypting data is prohibited, you can use IPsec. Items Settings and Explanation IKE Encryption Select the encryption algorithm for IKE.
The items vary depending on the version of IKE. Authentication Select the authentication algorithm for IKE. Key Exchange Select the key exchange algorithm for IKE. The items vary depending on the version of IKE. ESP Encryption Select the encryption algorithm for ESP. This is available when ESP is selected for Security Protocol. Authentication Select the authentication algorithm for ESP. This is available when ESP is selected for Security Protocol. AH Authentication Select the encryption algorithm for AH. This is available when AH is selected for Security Protocol. Setting of Local Address (Scanner) IPv4 IPv6*2 Any addresses*3