ISC DHCP

Note

To manage ISC DHCP servers in the Management console, see ISC DHCP (Management Console).

Defining Options on ISC DHCP Servers

  1. In Admin ‣ Server Management select the applicable DHCP Server and select Edit DHCP options from the ellpisis menu or use Actions ‣ Edit DHCP options. The Edit DHCP Options box displays. The dialog box shows all custom options defined on the DHCP server. The available ISC DHCP options can be selected from the dropdown menu.

  2. To add an option, select it from the option list. The option field is added to the dialog.

  3. To delete an option, hover over its field and click the trash button next to it.

  4. Click Save to save the changed option definitions.

ISC Server Properties

Authoritative

Specifies whether the server is authoritative to determine if a DHCP request from a client is valid

DDNS Domain Name

Specifies the DNS domain name to use to store the A record for a DHCP client.

DDNS Reverse Domain Name

Specifies the DNS reverse domain name to use to store the PTR record for a DHCP client.

DDNS Update Style

Specifies how the DHCP server does DNS updates. The available styles are:

None

Dynamic DNS updates are not performed

Ad-hoc

Warning

This update scheme is deprecated

Interim

This is the recommended scheme for dynamic DNS updates

DDNS Updates

Specifies whether to perform DNS updates. This setting has no effect unless DNS updates are enabled globally with the DDNS Update Style setting.

DDNS TTL

Specifies (in seconds) the TTL value to use when performing a DNS update.

Default Lease Time

Specifies (in seconds) the default lease time to use for DHCP leases.

Log Facility

Specifies which syslog facility to use when logging DHCP server messages. All possible facilities are listed; however, not all of these facilities are available on all system.

Max/Min Lease Time

Specifies (in seconds) the maximum/minimum lease time to use for DHCP leases.

Get Lease Hostnames

Specifies whether the DHCP server should perform a reverse DNS lookup for each address assigned to a client and send the result to the client in the hostname option.

One Lease per Client

Specifies whether the DHCP server should free any existing leases held by a client when the client requests a new lease.

Ping Check

Specifies whether the DHCP server should send an ICMP echo message to probe an IP Address before offering it to a DHCP client.

Ping Timeout

Specifies for how many seconds the DHCP server should wait for an ICMP echo response when Ping Check is active.

Filename

Specifies the name of the initial boot file to be used by a client.

Server Name

Specifies the name of the server from which the client should load its boot file.

Next Server

Specifies the host address of the server from which the initial boot file (that is specified by Filename) is to be loaded.