Administrator Information > Advanced Security Settings > Solving Problems for Advanced Security Solving Problems for Advanced Security Restoring the Security Settings When you establish a highly secure environment such as IPsec/IP Filtering, you may not be able to communicate with devices because of incorrect settings or trouble with the device or server. In this case, restore the security settings in order to make settings for the device again or to allow you temporary use. Disabling the Security Function Using Web Config You can disable IPsec/IP Filtering using Web Config. 1. Access Web Config and select the Network Security tab > IPsec/IP Filtering > Basic . 2.
Disable the IPsec/IP Filtering . Problems Using Network Security Features Forgot a Pre–shared Key Re-configure a pre-shared key. To change the key, access Web Config and select the Network Security tab > IPsec/IP Filtering > Basic > Default Policy or Group Policy . When you change the pre-shared key, configure the pre-shared key for computers. Related Information & “Running Web Config on a Web Browser” on page 26 & “Encrypted Communication Using IPsec/IP Filtering” on page 219 Cannot Communicate with IPsec Communication Specify the algorithm that the scanner or the computer does not support. The scanner supports the following algorithms. Check the settings of the computer.
232 Security Methods Algorithms IKE encryption algorithm AES-CBC-128, AES-CBC-192, AES-CBC-256, AES-GCM-128*, AES-GCM-192*, AES-GCM-256*, 3DES IKE authentication algorithm SHA-1, SHA-256, SHA-384, SHA-512, MD5 IKE key exchange algorithm DH Group1, DH Group2, DH Group5, DH Group14, DH Group15, DH Group16, DH Group17, DH Group18, DH Group19, DH Group20, DH Group21, DH Group22, DH Group23, DH Group24, DH Group25, DH Group26, DH Group27*, DH Group28*, DH Group29*, DH Group30*