DHCP server

Use this page to create DHCP subnets.

Navigation: SERVICES > DHCP > DHCP Server.

DHCP subnet
Subnet The list of available subnets. Select "Empty" to create a new one.
Subnet name The subnet name.
Settings
Network The IP address that specifies the network ID of the subnet when combined with the network mask value entered in the Netmask. For example: 192.168.10.0.
Netmask Define the subnet range by entering a network mask, for example, 255.255.255.0.
Primary DNS The value that a requesting network host will receive for the primary DNS server it should use.
Secondary DNS The value that a requesting network host will receive for the secondary DNS server it should use.
Default gateway The value that a requesting network host will receive for the default gateway it should use.
Enabled New DHCP subnets are enabled by default.
Advanced » Expands the view to show the following options.
Primary WINS The value that a requesting network host will receive for the primary WINS server it should use. Very small Microsoft Windows networks often don't need this.
Secondary WINS The value that a requesting network host will receive for the secondary WINS server it should use. Very small Microsoft Windows networks often don't need this.
Primary NTP

The IP address of the Network Time Protocol (NTP) server that the clients will use if they support this feature.

Tip: Enter the Smoothwall’s IP address. Clients can use its time services if turned on.

Secondary NTP

The IP address of a secondary Network Time Protocol (NTP) server that the clients will use if they support this feature.

Tip: Enter the Smoothwall’s IP address. Clients can use its time services if turned on.

Default lease time (mins)

The lease time in minutes assigned to network hosts that do not request a specific lease time. The default value is usually enough.

Max lease time (mins)

The lease time limit in minutes to prevent network hosts requesting, and being granted, impractically long DHCP leases. The default value is usually enough.

TFTP server

The Trivial File Transfer Protocol (TFTP) server workstations to use from the network when starting up.

Network boot filename

The file that the network client downloads off the selected TFTP server when staring up.

Domain name suffix

The domain name suffix that is appended to the requesting host's hostname.

Automatic proxy config URL

The URL that clients will use for determining proxy settings.

Note: It should reference a proxy auto-config (PAC) file and only some systems and web browsers support this feature.

{DHCP Custom Option Description} Any custom options that you create on the Custom options page appear here with the description as the label.
Add a new dynamic range
Start address The start of an IP range over which the DHCP server should supply dynamic addresses from. This address range should not contain the IPs of other devices on your LAN with static IP assignments.
End address The end of an IP range over which the DHCP server should supply dynamic addresses to. For example, enter 192.168.10.15. This address range should not contain the IPs of other devices on your LAN with static IP assignments.
Comment A description of this dynamic range.
Enabled Dynamic ranges are enabled by default.
Current dynamic ranges
Start address The start of an IP range over which the DHCP server should supply dynamic addresses from.
End address The end of an IP range over which the DHCP server should supply dynamic addresses to.
Enabled Indicates whether the range is active or not.
Mark Indicates whether you have the range selected or not.
Remove dynamic range Deletes the selected range.
Edit dynamic range Refreshes the page with the selected range in the Add a new dynamic range section so that you can amend the details.
Add a new static assignment
MAC address The MAC address of the network host’s NIC as reported by an appropriate network utility on the host system. This is entered as six pairs of hexadecimal numbers, with a space, colon or other separator character between each pair, for example, 12 34 56 78 9A BC or 12:34:56:78:9A:BC.
IP address The IP address that the host should be assigned.
Comment

description of this static assignment.

Enabled Static assignments are enabled by default.
Current static assignments
MAC address The MAC address of the network host’s NIC as reported by an appropriate network utility on the host system.
IP address The IP address that the host should be assigned.
Enabled Indicates whether the assignment is active or not.
Mark Indicates whether the assignment is selected or not.
Remove static Deletes the selected assignment.
Edit static Refreshes the page and loads the selected static assignment in the Add a new static assignment section so that you can amend the details.
Add static assignment from ARP table
MAC address The MAC address of the network host’s NIC as reported by an appropriate network utility on the host system.
IP address The IP address that the host should be assigned.
Interface Indicates the interface used.
Mark Indicates whether the assignment is selected or not.
Add static from ARP table Adds the selected static assignment from the ARP cache to the selected DHCP subnet.

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Managing DHCP servers

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DHCP

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