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No password set!

Set a root password before connecting this device to any untrusted network.

DHCP

Static leases are used to assign fixed IP addresses and symbolic hostnames to DHCP clients. They are also required for non-dynamic interface configurations where only hosts with a corresponding lease are served.

Use the Add Button to add a new lease entry. The MAC address identifies the host, the IPv4 address specifies the fixed address to use, and the Hostname is assigned as a symbolic name to the requesting host. The optional Lease time can be used to set non-standard host-specific lease time, e.g. 12h, 3d or infinite.

The tag construct filters which host directives are used; more than one tag can be provided, in this case the request must match all of them. Tagged directives are used in preference to untagged ones. Note that one of mac, duid or hostname still needs to be specified (can be a wildcard).
HostnameMAC AddressesIPv4 addressLease timeDUID/IAIDsIPv6 TokenSet TagMatch Tag
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Active DHCPv4 Leases

HostnameIPv4 addressMAC addressDUIDIAIDRemaining time
There are no active leases

Active DHCPv6 Leases

InterfaceHostnameIPv6 addressesDUIDIAIDRemaining time
There are no active leases
This is the only DHCP server in the local network.
Local domain suffix appended to DHCP names and hosts file entries.
Allocate IP addresses sequentially, starting from the lowest available address.
Maximum allowed number of active DHCP leases.
Never send queries for FQDNs in the Address option to an upstream resolver.
Bind only to configured interface addresses, instead of the wildcard address.
unspecified▾
Listen only on the specified interfaces, and loopback if not excluded explicitly.
unspecified▾
Listen only on the specified addresses.
unspecified▾
Do not listen on the specified interfaces.
Log all options sent to DHCP clients and the tags used to determine them.
  • unspecified
  • KERN
  • USER
  • MAIL
  • DAEMON
  • AUTH
  • LPR
  • NEWS
  • UUCP
  • CRON
  • LOCAL0
  • LOCAL1
  • LOCAL2
  • LOCAL3
  • LOCAL4
  • LOCAL5
  • LOCAL6
  • LOCAL7
  • stderr
···▾
Set log class/facility for syslog entries.
Suppress logging of the routine operation for the DHCP protocol.
Read /etc/ethers to configure the DHCP server.
File to store DHCP lease information.
Relay DHCP requests elsewhere. OK: v4↔v4, v6↔v6. Not OK: v4↔v6, v6↔v4.
Note: you may also need a DHCP Proxy (currently unavailable) when specifying a non-standard Relay To port(addr#port).
You may add multiple unique Relay To on the same Listen addr.
Relay fromRelay to addressOnly accept replies via
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A tag is an alphanumeric label. They are attached to a DHCP client or transaction.
dnsmasq conditionally applies chosen DHCP options when a specific tag is encountered.
In other words: "This tag gets these option(6):<opt-name>,[<value>[,<value>]]".
tags do not do anything by themselves. They are labels that other directives test against.
Note: invalid option(6):<opt-name>,[<value>[,<value>]] combinations may cause dnsmasq to crash silently.

Prepend a tag with ! to invert their domain of application, e.g. to send options to a host lacking a tag.

Use the Add tag button to add a new tag.
NameApply these DHCP OptionsForce
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Encountering chosen DHCP option(6)s (or also its ,value) from clients triggers dnsmasq to set alphanumeric tags.
In other words: "match these option(6)s to set this tag" or "These option(6)s set this tag".
Internally, these configuration entries are called match.
Matching option syntax: <option number>|option:<option name>[,<value>]. Prefix named (IPv6) options with option(6):. Wildcards (*) allowed.

Match option:client-arch,6, Tag efi-ia32, sets tag efi-ia32 when number 6 appears in the list of architectures sent by the client in option 93.
Use the Add Button to add a new match.
Match this client option(+value)In order to Set this TagForce
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Match Vendor Class (VC) strings sent by DHCP clients as a trigger to set tags on them.

Use the Add Button to add a new VC.
Match this Vendor ClassIn order to set this TagForce
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Match User Class (UC) strings sent by DHCP clients as a trigger to set tags on them.

Use the Add Button to add a new UC.
Match this User ClassIn order to set this TagForce
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Enable the built-in single-instance TFTP server.
Special PXE boot options for Dnsmasq.
FilenameServer nameServer addressDHCP OptionsMatch this TagForceInstance
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Note that many options are set on a per-interface basis in the Interfaces tab.
Use odhcp for DHCPv4. This will disable DHCPv4 support in dnsmasq.
The DHCPv4 functionality also needs to be enabled on a per-interface basis.
File to store active DHCP leases in.
Path to a script to run each time the lease file changes.
Directory to store hosts files (IP address to hostname mapping) in. Used by e.g. dnsmasq.
Directory to store IPv6 prefix information files in (to detect and announce stale prefixes).
  • unspecified
  • Emergency
  • Alert
  • Critical
  • Error
  • Warning
  • Notice
  • Info
  • Debug
···▾
Log level of the odhcpd daemon.
PXE over IPv6 boot options.
The last entry without an architecture becomes the default.
URLArchitecture
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  • Save & Apply
  • Apply unchecked
···▾

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