7. Hosts

Hosts is a dropdown menu always reachable from the top toolbar that contains a bunch of links to host- related information pages. The dropdown is as follows:

Hosts Dropdown

The Hosts Dropdown Menu

Host-related information pages available have the following content

  • Hosts page shows all hosts seen
  • Networks page lists all networks — both local and remote — any seen host belongs to
  • Host Pools page has the list of the defined Host Pools
  • Autonomous Systems page presents all Autonomous Systems (AS) any seen host belongs to
  • Countries page shows hosts countries based on the information provided by MaxMind databases
  • Operating Systems page lists all host operating systems that have been detected. Detection is done using passive fingerprinting techniques
  • HTTP Servers (Local) page shows monitored HTTP servers, limited to local hosts only
  • Top Hosts Traffic page presents traffic of top hosts in order to typology selected;
  • Geo Map page lays out hosts in a geographic map to give visual insights into the geographical locations of seen hosts
  • Tree Map page shows a tree representation of the monitored environment
  • Local Matrix page displays a matrix representation of local systems

7.1. All Hosts

All hosts that have been seen monitoring network interfaces are show here. Column headers can be clicked to sort results in descending (ascending) order of the clicked header. Additional sort options are available in the top right corner of the table. The table shown has several columns, including

  • IP address, with optional country flag and OS logo (if detected)
  • Location, either Local (the host belongs to a local network) or Remote (the host belongs to a remote network) — please note that this is not a geographical location
  • Alerts, with the number of alerts associated to the host
  • Name, having the resolved hostname (or a custom name, if set in any Host Details page)
  • Seen Since, with the amount of time it has lapsed since the first packet sent/received by the host has been observed
  • ASN, with the AS number (if available)
  • Breakdown, showing a bar that gives visual insights in the use of both traffic directions
  • Throughput, with the overall actual throughput of the host
  • Traffic, with the total traffic exchanged by the host
Alls Hosts

The All Hosts Page

Any host can be clicked to be redirected to its ‘Host Details’ page, which is discussed below.

7.2. Host Pools

Host Pools are logical groups of hosts that are described in detail in the “Network Interfaces” section of this document. This page show the list of defined and currently active Host Pools.

Host Pools List

The Host Pools List Hosts Page

Each row of the table shows, for each pool, the following information:

  • The Pool Name as defined by the user during Host Pool creation
  • A Chart icon to access historical pool traffic timeseries. Historical pool traffic charts must be enabled from the preferences page and are a feature that is only supported in the Professional version.
  • The number of active hosts in the pool
  • The number of alerts detected as the sum of host alerts for each host in the pool
  • Seen Since, with the amount of time it has lapsed since the first packet sent/received by any of the hosts in the pool has been observed
  • Breakdown, showing a bar that gives visual insights in the use of both pool traffic directions
  • Throughput, with the overall actual throughput of the pool
  • Traffic, with the total traffic exchanged by the pool

Host pools can be configured from the network interface page.

7.3. Networks

Networks shows all networks discovered by ntopng.

Networks List

The Networks Summary Page

For each network discovered ntopng provides the number of hosts, alerts triggered, date of discovery, breakdown, throughput and traffic. Network names can be clicked to display the hosts lists inside the network selected.

7.4. Autonomous Systems

Autonomous Systems shows all autonomous systems discovered by ntopng.

AS List

The Hosts Autonomous Systems Summary Page

Ntopng uses a Maxmind database to gather information about Autonomous Systems (AS) and based on this it groups hosts belonging to the same AS. AS number 0 contains all hosts having private IP addresses.

7.5. Countries

Countries page provides all countries discovered by ntopng. Any country can be clicked to be redirected to a page containing the full list of hosts localised in that country.

Hosts Countries List

The Hosts Countries Summary Page

7.6. Operating Systems

Operating Systems page shows a list of all OS detected by ntopng. OSes can be clicked to see the detailed list of hosts.

Hosts Operating Systems List

The Hosts Operating Systems Summary Page

7.7. HTTP Servers (Local)

HTTP Servers page lists all local HTTP Servers. Multiple distinct virtual hosts may refer to the same HTTP server IP, which is specified in the second column. Additional information such as bytes sent and received are available for each HTTP virtual host. By clicking on the magnifying lens icon near to the HTTP virtual host, it is possible to display all active flows involving it.

Local HTTP Servers List

The Local HTTP Servers Summary Page

7.8. Top Hosts (Local)

Top hosts page provides hosts activity on time basis. The page should be kept open in order to allow the graph to dynamical update itself with real-time freshly collected data for each host. The time axis is divided in 5-minute bars and goes backwards in time in a right-to-left fashion, starting from the present.

Top Hosts

The Top Hosts Summary Page

7.9. Geo Map

The Hosts Geo Map page provides world map where hosts are arranged according to their geographical position.

Geo Map

The Hosts Geo Map Summary Page

7.10. Tree Map

This page provides a tree map of all monitored hosts. By clicking on hosts it is possible to visit the corresponding ‘Host Details’ page.

Tree Map

The Hosts Tree Map Summary Page

7.11. Local Flow Matrix

Local Hosts Active Flows Matrix page visualises a matrix of local hosts versus local hosts. Each cell contains the amount of traffic exchanged between every pair of hosts. Since flows are bi-directional, up to two values can be indicated in each cell.

Flows Matrix

The Active Flows Matrix Page