Dualog Network Control - DHCP Server configuration


The Dynamic Host Configuration Protocol (DHCP) is a protocol that is used to automatically assign IP addresses to computers, networked equipment (printers, disk drives), and handheld devices.

This article explains how to configure the Dualog server onboard as a DHCP server and lease IP addresses to client devices on a network.


  1. Login to Dualog Portal with either Owner or Member access type account.
  2. Expand the menu located on the top-left corner > Connection Suite > Network Control
  3. Click on "Configure Network Control" > Select a vessel
  4.  Under DHCP Leases tab > click on "Create DHCP Server"
  5. Fill in all values within the DHCP Server Information
  6. Add the respective DHCP options
  7. Save and close




    • This field must match the adapter IP address of the Dualog server's designated physical network card. In other words, an identical IP address must be configured as follows:mceclip0.png
    • It's worth noting that if this address is obtained through automatic configuration, you probably don't want to set up another DHCP server on the same network.
    • Ensure that this service is active and checked.
    • This is the range from which all the computers in the network will get their address.
    • The maximum size of a range is 255 computers. The “255” address is always assigned to a broadcast address, and the “0” address is always assigned to a network address. Neither can be assigned to hosts, as they are reserved for these special purposes.
    • Make sure that the network range matches the address of the DHCP server. 
    • Example: ( ->, with the DHCP server IP as
    • A subnet mask is a number that distinguishes the network address and the host address within an IP address. (Example: = /24)
    • This field must match the subnet mask of the Dualog server's designated physical network card. In other words, an identical subnet mask must be configured as follows:mceclip1.png
    •  The Lease Time indicates how long a device is allowed to use that IP Address.



  • Router
    • The DHCP client will use this as its gateway address. The value is the gateway's IP address. If the DHCP server is on the same computer as DuaCore Pro, this should be set to the same IP address as the DHCP server.
    • This field can be used multiple times, but it is not recommended because DHCP clients can use any router they want.
  • Time Server
    • The values must be an IP address pointing to an NTP time server.
  • DNS Server
    • This is the name server that the DHCP client will use. The value must be an IP address, and it may be entered as many times as necessary.
  • Domain Name
    • This will be the DNS suffix used for this connection. The value is a string that can be used only once. This is only useful if the clients' domain names are fully qualified.
  • MTU Interface
    • It must be a number and defines the MTU of the DHCP client's interface. This can be used only once.
  • Same MTU in subnet
    • The value can only be 0 or 1. 0 indicates that the DHCP client should expect some networks directly connected to the DHCP client's network to have smaller MTU. The value 1 indicates that all subnets have the same MTU. This can be used only once.
  • Proxy autoconfig
    • This entry can be used to allow Internet Explorer to automatically detect the Dualog Web4Sea proxy in the network. This is a string that should be set to http://IP-of-Connection-Suite>:3000/proxyautoconfig
    • This entry should be added only once. More can be added, but this will confuse the Internet Browser.


This table displays the network's dynamic DHCP leases. The following features are available within the DHCP lease table:
  1. Static leases can also be assigned to devices by clicking on them, checking the static lease box, and saving changes.
  2. Create a manual lease and fill up the necessary fields.
  3. By clicking on "Clear Lease table," you can also clear the existing DHCP lease table. 
  4. Individual DHCP lease can be deleted by clicking on the bin icon.





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