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Installation, Deployment, and Upgrade
Installing Unica Discover involves planning and preparing your environment, installing and configuring prerequisite software, obtaining the Unica Discover installation files, and running the Unica Discover installer.
Discover Network Capture Application Manual
Configuring DNCA on Red Hat Enterprise Linux™ (RHEL)
The following sections contain important information for configuring DNCA in a Red Hat Enterprise Linux™ environment:
Enable DNS
/etc/resolv.conf

Installation, Deployment, and Upgrade
Installing Unica Discover involves planning and preparing your environment, installing and configuring prerequisite software, obtaining the Unica Discover installation files, and running the Unica Discover installer.
- Installation and Deployment Manual
- Discover Network Capture Application Manual
  - Discover Network Capture Application Overview
    Network Capture Application from Discover captures and records the complete interaction between the visitor and the web application environment by using a network tap or network switch spanning port. The Network Capture Application software features the following benefits:
  - Installing the Network Capture Application
    The following instructions can be used to assist the installation of your Network Capture Application software.
  - Configuring the DNCA
    The Unica Discover Network Capture Application can be configured through a web-based console or through the configuration files that are stored on the DNCA server. The following information guides you on how to configure the DNCA.
  - Upgrade for DNCA
    It is recommended that you always use the latest version of the Unica Discover Network Capture Application suitable for your version of Unica Discover.
  - Packet Forwarder Overview
    The Packet Forwarder is used to capture and forward hits to a cloud-based DNCA that is operating on a virtual machine.
  - SSL Keys
    For decrypting transmissions by using the SSL protocol, the Unica Discover Network Capture Application must be provided the SSL keys in use in the transaction stream.
  - Performance Measurement
    Performance measurement provides details on the Network Capture software performance and timestamp measurements.
  - Configuring DNCA on Red Hat Enterprise Linux™ (RHEL)
    The following sections contain important information for configuring DNCA in a Red Hat Enterprise Linux™ environment:
    - DNCA on RHEL - Configuring DNS
    - Disable DNS
    - Enable DNS
      - /etc/resolv.conf
    - DNCA on RHEL - Configuring Network Interfaces
    - DHCP Example
    - ETHTOOL_OPTS Example
    - Static IP example
      This example configures shows how a capture server with static IP settings is configured.
    - Configuring NTP for DNCA on RHEL
      You can configure an NTP daemon to synchronize the time of the machine with one or more NTP servers.
    - DNCA on RHEL - Configuring Serial-Port Access
  - DNCA monitoring
    You can monitor the passive capturing to diagnose performance issues.
  - Overview of DNCA maintenance
    The maintenance utility performs routine maintenance and logging tasks for Discover DNCA. You can use the utility to help maintain the ability of the DNCA to perform DNCA.
  - DNCA frequently asked questions (FAQ)
    The following content contains frequently asked questions or scenarios that can be used to help isolate or fix an issue with your Network Capture Application.
  - Downloading Privacy Configuration
  - Enabling web console access through a single IP address
    You can specify a single IP address which can access the web console. Limiting access to a single IP address helps to prevent unauthorized access through an unknown system.
  - Applying authentication when accessing the web console
    You can improve security by enabling authentication to the web console.
- Unica Discover Session Archiving Installation Guide
  As you prepare for an installation, you need to gather some items, review hardware and software requirements, and then you can perform the installation.
- Discover Upgrade Manual

/etc/resolv.conf

About this task

To specify the DNS domain and servers:

Procedure

Edit the file /etc/resolv.conf.
When DHCP is enabled for a network interface, the file /etc/resolv.conf is automatically generated by the DHCP client program with the DNS servers specified by the DHCP server.
- You normally edit /etc/resolv.conf only when using fixed (static) IP addresses.
The /etc/resolv.conf file should specify the domain name suffix to use when a hostname is not fully qualified.
You must also specify the name of at least one DNS server to use for hostname and IP resolution. Below is an example of /etc/resolv.conf for the domain machines Discover.com with two DNS servers:
```
search machines.Discover.com
nameserver 172.16.0.5
nameserver 172.16.0.6
```

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