Epson WorkForce Enterprise WF-C20750 Administrator Guide - Page 73

Communication was Working, but Stopped, Cannot Create the Secure IPP Printing Port, DH Group1, DH

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Security method IKE authentication algorithm IKE key exchange algorithm ESP encryption algorithm ESP authentication algorithm AH authentication algorithm Supported algorithms SHA-1, SHA-256, SHA-384, SHA-512, MD5 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* AES-CBC-128, AES-CBC-192, AES-CBC-256, AES-GCM-128, AESGCM-192, AES-GCM-256, 3DES SHA-1, SHA-256, SHA-384, SHA-512, MD5 * Available for IKEv2 only Parent topic: Solving Network Security Problems Communication was Working, but Stopped If network communication was working, but suddenly stopped, the product's and/or computer's IP address may have changed or is invalid. Try these solutions: • Disable IPsec using the product control panel. • If DHCP is out of date, or the IPv6 address is out of date or was not obtained, you may not be able to find the IP address registered in Web Config. • If that does not solve the problem, enter a static IP address using Web Config. Parent topic: Solving Network Security Problems Cannot Create the Secure IPP Printing Port If you cannot create the secure IPP printing port, try these solutions: • Make sure you specified the correct server certificate for SSL/TLS communication using Web Config. • If you are using a CA certificate, make sure it is imported to the computer that is accessing the product. Parent topic: Solving Network Security Problems 73

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Security method
Supported algorithms
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
* Available for IKEv2 only
Parent topic:
Solving Network Security Problems
Communication was Working, but Stopped
If network communication was working, but suddenly stopped, the product's and/or computer's IP
address may have changed or is invalid. Try these solutions:
• Disable IPsec using the product control panel.
• If DHCP is out of date, or the IPv6 address is out of date or was not obtained, you may not be able to
find the IP address registered in Web Config.
• If that does not solve the problem, enter a static IP address using Web Config.
Parent topic:
Solving Network Security Problems
Cannot Create the Secure IPP Printing Port
If you cannot create the secure IPP printing port, try these solutions:
• Make sure you specified the correct server certificate for SSL/TLS communication using Web Config.
• If you are using a CA certificate, make sure it is imported to the computer that is accessing the
product.
Parent topic:
Solving Network Security Problems