Avaya 3050-VM, Руководство пользователя, Страница: 268 / 274

CSR (Certificate
Signing Request) A request for a digital certificate, sent to a CA. On the VPN Gateway, you can
generate a CSR from the command line interface by using the
request
command.
DCE (Data
Communications
Equipment) A device that communicates with a Data Terminal Equipment (DTE) in RS-232C
communications.
DER
(Distinguished
Encoding Rules) A process for unambiguously converting an object specified in ASN.1 (such as an
X.509 certificate, for example) into binary values for storage or transmission on a
network.
Digital Certificate The digital equivalent of an ID card used in conjunction with a public key encryption
system. Digital certificates are issued by trusted third parties known as certificate
authorities (CAs), after verifying that a public key belongs to a certain owner. The
certification process varies depending on the CA and the level of certification.
Digital Signature A digital guarantee that a document has not been altered, as if it were carried in an
electronically-sealed envelope. The "signature" is an encrypted digest of the text
that is sent with the text message. The recipient decrypts the signature digest and
also recomputes the digest from the received text. If the digests match, the message
is proved intact and tamper free from the sender.
A digital signature ensures that the document originated with the person signing it
and that it was not tampered with after the signature was applied. However, the
sender could still be an impersonator and not the person he or she claims to be. To
verify that the message was indeed sent by the person claiming to send it requires
a digital certificate (digital ID) which is issued by a certification authority.
DIP (Destination
IP) Address The destination IP address of a frame.
DPort (Destination
Port) The destination port number, linking the incoming data to the correct service. For
example, port 80 for HTTP, port 443 for HTTPS, port 995 for POP3S.
DTE (Data
Terminal
Equipment) A device that controls data flowing to or from a computer. The term is most often
used in reference to serial communications defined by the RS-232C standard. This
standard defines the two ends of the communication channel as being a DTE and
DCE device. However, using a null-modem cable, a DTE to DTE communication
channel can also be established between, for example, two computers.
Extended Profile Extended profiles can be defined for a user group if other links and access rules
should apply when the user authenticates by means of a specific authentication
method or when connecting from a specific IP address or network.
GSLB (Global
Server Load
Balancing) An Application Switch feature that allows you to balance server traffic load across
multiple physical sites. The Avaya GSLB implementation takes into account an
individual site's health, response time, and geographical location to smoothly
CSR (Certificate Signing Request)
268 User Guide April 2013
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