Ricoh MP 2553 Series Read Me First page 507

Security level
Authentication and Low Level
Encryption
Authentication and High Level
Encryption
The following table lists the settings that are automatically configured according to the security
level.
Setting Authentication Only
Security Policy Apply
Encapsulation
Transport
Mode
IPsec Requirement
Use When Possible
Level
Authentication
PSK
Method
Phase 1 Hash
MD5
Algorithm
Phase 1 Encryption
DES
Algorithm
Phase 1 Diffie-
2
Hellman Group
Phase 2 Security
AH
Protocol
Security level features
Select this level if you want to encrypt the data packets as well
as authenticate the transmission partner and prevent
unauthorized packet tampering. Packet encryption helps
prevent eavesdropping attacks. This level provides less security
than "Authentication and High Level Encryption".
Select this level if you want to encrypt the data packets as well
as authenticate the transmission partner and prevent
unauthorized packet tampering. Packet encryption helps
prevent eavesdropping attacks. This level provides higher
security than "Authentication and Low Level Encryption".
Authentication and Low
Level Encryption
Apply
Transport
Use When Possible
PSK
SHA1
3DES
2
ESP
Configuring IPsec
Authentication and High
Level Encryption
Apply
Transport
Always Require
PSK
SHA256
AES-128-CBC
2
ESP
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