====== Server Name Indication based metrics ======

This article helps with providing steps to install and use the SNI TLS Metrics app in Trisul Network Analytics.

**
To provide visibility into TLS/SSL traffic by breaking it up by SNI Hostname.
**

{{:tips:sni-tls.png?200|}}

SNI stands for Server Name Indication.It indicates the hostname thT is being contacted by the browser at the beginning of a handshake.This feature allows a server to connect multiple SSL Certificates to one IP address and gate.

This app provides the following 3 metrics namely,
  - A new Counter Group called "SNI"
  - A new Resource Group called "SNI" contains IP->SNI hostname mapping.
  - Top SNI Hostnames for each meter by bandwidth and hits.

===== Installing =====

  * You can install the app by logging on as Admin,and selecting //Web Admin > Manage > Apps > SNI TLS Metrics.//
  * Restart the probes.

{{:tips:sni-tls-admin.png?600|}}

===== Viewing Data =====

The app shows the following metrics,
  * meter 0 : bandwidth per hostname.
  * meter 1 : flows/hits per hostname.
You can view the metrics by selecting //Retro > Retro Counters.//

{{:sni-tlsmetricss.png?600|}}