Epson WorkForce WF-3640 - Pre-Shared Key was Forgotten; Cannot Communicate with the Product Using Ipsec Communication; Communication was Working, but Stopped

Pre-Shared Key was Forgotten
If you forget a pre-shared key, change the key using Web Config for the default or group policy.
Parent topic: Solving Network Security Problems
Cannot Communicate with the Product Using IPsec Communication
Make sure your computer is using one of these supported algorithms for communicating with the
product:
Security method Supported algorithms
Consistency Algorithm AES-CBC 128
AES-CBC 192
AES-CBC 256
3DES-CBC
DES-CBC
Hash Algorithm SHA-1
SHA2-256
SHA2-384
SHA2-512
MD5
Algorithm Compatible with Diffie-Hellman Group2
a key
Diffie-Hellman Group1, Diffie-Hellman Group14, Elliptic Curve Diffie-
Hellman P-256, Elliptic Curve Diffie-Hellman P-384; available method may
vary by model
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.
50