Szablon: Web dhcpanddns

The DHCP and DNS page of {{{model}}} router is used to manage DHCP-Server and DNS-Forwarder for NAT firewalls.

Server Settings

General Settings

Name	Value	Description
Domain required	On/Off, default: On	Don't forward DNS-Requests without DNS-Name
Authoritative	On/Off, default: On	This is the only DHCP-Server in the local network
Local server	path, default: /lan/	Local domain specification. Names matching this domain are never forwarded and are resolved from DHCP or hosts files only
Local domain	string, default: lan	Local domain suffix appended to DHCP names and hosts file entries
Log queries	On/Off, default: Off	Write received DNS requests to syslog
DNS forwardings		List of DNS servers to forward requests to
Addresses		List of domains to force to an IP address.
Rebind protection	On/Off, default: On	Discard upstream RFC1918 responses
Allow localhost	On/Off, default: On	Allow upstream responses in the 127.0.0.0/8 range, e.g. for RBL services
Domain whitelist		List of domains to allow RFC1918 responses for
Local Service Only	On/Off, default: On	Limit DNS service to subnets interfaces on which we are serving DNS.
Non-wildcard	On/Off, default: On	Bind dynamically to interfaces rather than wildcard address (recommended as linux default)
Listen Interfaces		Limit listening to these interfaces, and loopback.
Exclude interfaces		Prevent listening on these interfaces.

Resolv and Hosts Files

Name	Value	Description
Use /etc/ethers	On/Off, default: On	Read /etc/ethers to configure the DHCP-Server
Leasefile	path, default: /tmp/dhcp.leases	file where given DHCP-leases will be stored
Ignore resolve file	On/Off, default: Off
Resolve file	path, default: /tmp/resolv.conf.d/resolv.conf.auto	local DNS file
Ignore /etc/hosts	On/Off, default: Off
Additional Hosts files

TFTP Settings

Name	Value	Description
Enable TFTP server	On/Off, default: Off
TFTP server root	path	Root directory for files served via TFTP
Network boot image	string	Filename of the boot image advertised to clients

Advanced Settings

Name	Value	Description
Suppress logging	On/Off, default: Off	Suppress logging of the routine operation of these protocols
Allocate IP sequentially	On/Off, default: Off	Allocate IP addresses sequentially, starting from the lowest available address
Filter private	On/Off, default: On	Do not forward reverse lookups for local networks
Filter useless	On/Off, default: Off	Do not forward requests that cannot be answered by public name servers
Localise queries	On/Off, default: On	Localise hostname depending on the requesting subnet if multiple IPs are available
Expand hosts	On/Off, default: Off	Add local domain suffix to names served from hosts files
No negative cache	On/Off, default: Off	Do not cache negative replies, e.g. for not existing domains
Additional servers file		This file may contain lines like 'server=/domain/1.2.3.4' or 'server=1.2.3.4' for domain-specific or full upstream DNS servers.
Strict order	On/Off, default: Off	DNS servers will be queried in the order of the resolvfile
All Servers	On/Off, default: Off	Query all available upstream DNS servers
Bogus NX Domain Override		List of hosts that supply bogus NX domain results
DNS server port		Listening port for inbound DNS queries
DNS query port		Fixed source port for outbound DNS queries
Max. DHCP leases		Maximum allowed number of active DHCP leases
Max. EDNS0 packet size		Maximum allowed size of EDNS.0 UDP packets
Max. concurrent queries		Maximum allowed number of concurrent DNS queries
Size of DNS query cache		Number of cached DNS entries (max is 10000, 0 is no caching)

Static Leases

[[Category:{{{model}}} User Manual]]