HP 800 Series, User Manual

Page: 209 / 586

End-user Access
Test Methods Used
5-3
Test Methods Used
NAC 800 tests endpoints using one of the following methods:
■
Agent-based
■
Agentless
■
ActiveX
See “Testing Methods” on page 3-109 for a description of each of these
methods.
Agent Callback
The Agent Callback to NAC 800 feature allows the NAC 800 agent to inform
the ES that an endpoint is now active on the network and available to be tested.
This feature allows faster detection of endpoints in a network utilizing
static
IP addresses.
Upon notification of a new network connection, the agent queries DNS for all
available ESs and attempts to execute an HTTP request against each ES until
a successful request has occurred. This request causes the ES to schedule the
endpoint for testing.
The following terms are used in association with this feature:
■ Agent – The software residing on the endpoint that performs the tests.
■ Enforcement Server (ES) – The server that communicates with the
agent to initiate tests, and quarantines or allows network access
based on the test results.
■ Endpoint – The computer being tested by NAC 800.
■ SRV record – A DNS record that contains information regarding a
specific service on a network. For example, HTTP or mail.
■
A record – A DNS record that contains information regarding a
specific host name.
To enable this feature, add either SRV records or A records to your DNS
system.
The agent performs a DNS query against the server for the following SRV
names:
■
_nac