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4. Advanced Operations
This chapter contains information on commands and abilities available only in models equipped for remote
monitoring.
SSL
Secure Socket Layers (SSL) version 3 enables secure HTML sessions between a AmpMeter PDU Remote
Power Manager and a remote user. SSL provides two chief features designed to make TCP/IP (Internet)
transmitted data more secure:
• Authentication – The connecting client is assured of the identity of the server.
• Encryption – All data transmitted between the client and the server is encrypted rendering any
intercepted data unintelligible to any third party.
SSL uses the public-and-private key encryption system by RSA, which also requires the use of digital
certificates. An SSL Certificate is an electronic file uniquely identifying individuals or websites and enables
encrypted communication; SSL Certificates serve as a kind of digital passport or credential. The AmpMeter
PDU product’s SSL Certificate enables the client to verify the AmpMeter PDU’s authenticity and to
communicate with the AmpMeter PDU securely via an encrypted session, protecting confidential information
from interception and hacking.
SSL Command Summary
Command Description
Set SSL Enables/disables SSL support
Set SSL access Sets SSL access as optional or required
Enabling and Setting up SSL Support
NOTE: A restart of the AmpMeter PDU is required after setting or changing ANY SSL configurations. See
Performing a warm boot on page 28 for more information.
Enabling or disabling SSL support
The Set SSL command is used to enable or disable SSL support.
To enable or disable SSL support:
At the AmpMeter PDU: prompt, type set ssl, followed by enabled or disabled and press Enter.
Setting SSL access level
The Set SSL Access command is used to assign use of SSL as optional or required. The default access level
is set to optional.
To change the access level:
At the AmpMeter PDU: prompt, type set ssl access, followed optional or required, and press Enter.
Example
The following changes the access level to required:
AmpMeter PDU: set ssl access required<Enter>
SSL Technical Specifications
Secure Socket Layer (SSL) version 3
Transport Layer Security (TLS) version 1 (RFC 2246)
SSL/TLS-enabled HTTPS server (RFC 2818)
Self-Signed X.509 Certificate version 3 (RFC 2459)
Asymmetric Cryptography:
1024-bit RSA Key Exchange
Symmetric Cryptography Ciphers:
TLS_RSA_WITH_AES_256_CBC_SHA TLS_RSA_WITH_3DES_EDE_CBC_SHA
TLS_RSA_WITH_AES_128_CBC_SHA TLS_RSA_WITH_DES_CBC_SHA
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