Cato Networks Knowledge Base

Showing Known Hosts for a Site

Use the Known Hosts screen to show data and information about the hosts that are connected and transmitting data from a specific site in your account. This information can include: hostname, IP address, MAC address, DHCP lease information, last host activity, and more.

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You can choose to filter the hosts according to these options:

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  • Hosts in DHCP ranges - with this option the screen only shows hosts with IP addresses that are within the configured DHCP ranges.

  • All Hosts - Shows all known hosts for the site, this can include hosts with IP addresses that are within the configured DHCP ranges, and host that are not within those ranges. This can include any host on the site that is transmitting traffic through the Socket.

To show the known hosts for a site:

  1. From the navigation menu, click Network > Sites and select the site.

  2. From the navigation menu, click Site Monitoring > Known Hosts.

  3. From the drop-down menu in the upper-right corner, select the hosts that are shown:

    • Hosts in DHCP ranges - Only shows hosts with an IP address that is within the DHCP network ranges for this site

    • All Hosts - Show all the hosts that are behind the site

  4. Click Reload to refresh the data on the screen (the data isn't automatically updated).

Understanding the Known Hosts Fields

This section explains the columns and fields in the Known Hosts screen.

  • Name - Name of the host. Value is N/A when the hostname is unknown.

  • IP address - IP address for the host.

  • MAC Address - MAC address for the host. Value is N/A when the MAC address is unknown, for example, if the host is connected behind a router or firewall.

  • DHCP Range - DHCP IP range that the host's IP address belongs to.

  • Network Range - Shows the Name and the IP Subnet for the network range for the site.
  • IP Allocation - Shows how the IP address was allocated to the host: 
    • Dynamic - Host received a dynamic IP address from the Cato DHCP server.
    • Reserved - Host received a static, or reserved, IP address from the Cato DHCP server.
      • Reserved hosts are defined in the Hosts screen for the site (Network > Sites > {site name} > Site Configuration > Hosts).
    • N/A - The IP address was not allocated by the Cato DHCP server.
      • Cato detects that the Hosts are sending traffic, but the Host IP address was not allocated by the Cato DHCP server.
  • Last Activity - Amount of time that elapsed since this host had network activity (for example, 1 hour ago).

  • Lease Time - Duration of the configured DHCP lease time (either for the specific network range or the entire account).

    For hosts with Reserved IP Allocation, the Lease Time value is Permanent.

  • Expires In - Amount of time remaining for the DHCP lease for this host.

    For hosts with Reserved IP Allocation, the Expires In value is Never.

Sample Known Host Use Cases

This section explains the different types of hosts and expected values for the Known Host screen.

1. Connected hosts with Dynamic IP addresses allocated by the Cato DHCP Server.blobid2.png

2. Connected hosts with Reserved IP address allocated by the Cato DHCP Server. 

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3. Connected hosts with IP addresses that were not allocated by the Cato DHCP Server. For example, a host that is configured with a Static IP address, or has received the IP address from a third-party DHCP server.

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4. Hosts that are not directly connected to the Socket. For example, hosts behind a router or firewall.

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The following information for these hosts is unknown:

  • MAC Address
  • DHCP Range
  • Network Range
  • IP Allocation
  • Lease Time
  • Expires In

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Comments

2 comments

  • Comment author
    Alicia Wingren

    Our known hosts page does not have a drop down in the upper right corner.

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  • Comment author
    Community Manager The chief of community conversations. Community manager
    • Edited

    Hello Alicia!

    Thank you for your comment.  This feature is still officially in Early Availability (EA) and not yet GA.  This EA status is reflected in the title of the article, but I can see why this might be a bit confusing!  Anyway, this explains why you don't see the drop down menu. 

    I believe that this feature is targeted to go GA in the next release. I will now follow this KB article and make sure it gets updated when the feature goes GA.

    I hope that this helps!  Please let us know if it doesn't.

    Kind Regards,

    Dermot Doran

    Cato Networks

    0

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