Epson ES-C380W - Page 274

Cannot Communicate with IPsec Communication
Specify the algorithm that the scanner or the computer does not support.
e scanner supports the following algorithms. Check the settings of the computer.
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*
ESP encryption algorithm AES-CBC-128, AES-CBC-192, AES-CBC-256, AES-GCM-128, AES-GCM-192,
AES-GCM-256, 3DES
ESP authentication algorithm SHA-1, SHA-256, SHA-384, SHA-512, MD5
AH authentication algorithm SHA-1, SHA-256, SHA-384, SHA-512, MD5
*available for IKEv2 only
Cannot Communicate Suddenly
There is an error in the certicate.
e
scanner's date and time settings may be incorrect if power has not been supplied to the scanner for a long
time.
When the scanner is connected using a client certicate for IPsec/IP ltering or IEEE802.1X, an error is indicated
if a time lag occurs between the scanner's date and time and the validity period for the certicate. Because the
scanner recognizes that the certicate is unavailable.
You can solve this problem by correcting the scanner's date and time settings. Connect the scanner and the
computer using a USB cable, turn the scanner on, and then perform scanning over USB using Epson Scan 2. e
scanner is synchronized with the computer and the date and time settings are corrected.
e
scanner indicates
normal status.
If you cannot solve the problem, restore all network settings using the scanner's control panel. Connect the scanner
and computer, make the network settings again, and then make the settings for client certication, IPsec/IP
ltering, or IEEE802.1X.
The IP address of the scanner has been changed or cannot be used.
When the IP address registered to the local address on Group Policy has been changed or cannot be used, IPsec
communication cannot be performed.
Disable IPsec using the scanner's control panel.
If the DHCP is out of date, rebooting or the IPv6 address is out of date or has not been obtained, then the IP
address registered for the scanner's Web Cong (Network Security tab > IPsec/IP Filtering > Basic > Group
Policy > Local Address (Scanner)) may not be found.
Use a static IP address.
Administrator Information > Advanced Security Settings > Solving Problems for Advanced Security
274