RUTX11 DNS

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Main Page > RUTX Routers > RUTX11 > RUTX11 Manual > RUTX11 WebUI > RUTX11 Network section > RUTX11 DNS

The information in this page is updated in accordance with firmware version RUTX_R_00.02.05.1.

Summary[edit | edit source]

The DNS page is used to to set up how the device utilizes its own and other DNS servers.

This manual page provides an overview of the DNS windows in RUTX11 devices.

If you're having trouble finding this page or some of the parameters described here on your device's WebUI, you should turn on "Advanced WebUI" mode. You can do that by clicking the "Basic" button under "Mode", which is located at the top-right corner of the WebUI.

Networking rutx manual webui basic advanced mode.gif

General Settings[edit | edit source]

The General Settings section is used to set up the main DNS parameters. Refer to the table below for information on each configuration field.

Networking rutos manual dns general settings.png

Field Value Description
Domain required off | on; default: on When enabled, stops forwarding queries for plain names, without dots or domain parts, to upstream nameservers. If the name is not known from /etc/hosts or DHCP then a "not found" answer is returned.
Local server string; default: /lan/ Local domain specification. Names matching this domain are never forwarded and are resolved from DHCP or hosts files (/etc/hosts) only.
Local domain domain name; default: lan Local domain suffix appended to DHCP names and hosts file entries.
Log queries off | on; default: off When enabled, write received DNS requests to syslog.
DNS forwardings string; default: none List of DNS servers to forward requests to.
Rebind protection off | on; default: on Discards upstream RFC1918 responses. When enabled, the device will not resolve domain names for internal hosts.
Allow localhost off | on; default: on Allow upstream responses in the 127.0.0.0/8 range. For example, for RBL services.
Domain whitelist domain name(s); default: none List of domains to allow RFC1918 responses for.
Local Service Only off | on; default: off Limit DNS service to subnets and interfaces on which this device is serving as a DNS server.
Non-wildcard off | on; default: on Binds only to specific interfaces rather than wildcard address.
Listen Interfaces network interface(s); default: none Limits listening for DNS queries to interfaces specified in this field and loopback. Leave empty to listen on all interfaces.
Exclude Interfaces network interface(s); default: none Prevents listening for DNS queries on interfaces specified in this field. Leave empty to listen on all interfaces.

Resolve and Hosts Files[edit | edit source]

The Resolve and Hosts Files section is used to configure the usage of these files:

  • /etc/hosts - the hosts file; contains hostname/IP address combinations for DNS hostname resolution; it is always checked first;
  • /etc/resolv.conf - the resolve file; contains instructions that state the default search domain(s) that are used to complete a received query name into a fully qualified domain name (FQDN) when no domain suffix is provide.
    Also contains a list of nameserver IP addresses for hostname resolution (DNS servers);
  • /tmp/resolv.conf.auto - alternative resolve file, used for public hostname resolutions. The path to this file can be changed from this section.

Refer to the table below for information on each configuration field.

Networking rutos manual dns resolve and hosts files.png

Field Value Description
Ignore resolve file off | on; default: off When enabled, doesn't read upstream servers from /etc/resolv.conf which is linked to the resolve file by default.
Resolve file text file; default: none Specifies an alternate DNS resolve file to use instead of the default one (/tmp/resolv.conf.auto).
Ignore /etc/hosts off | on; default: off Local domain suffix appended to DHCP names and hosts file entries.
Additional Hosts files text file; default: none Uploads a hosts files to use in addition to /etc/hosts.

Advanced Settings[edit | edit source]

The Advanced Settings section is used to set up some of the more specific DNS parameters. Refer to the table below for information on each configuration field.

Networking rutos manual dns advanced settings.png

Field Value Description
Filter private off | on; default: on Do not forward reverse lookups for local networks.
Filter useless off | on; default: off When disabled, does not forward requests that cannot be answered by public name servers.
Localise queries off | on; default: on Localise hostname depending on the requesting subnet if multiple IPs are available.
Expand hosts off | on; default: on Adds local domain suffix to names served from the hosts file(s).
No negative cache off | on; default: off When disabled, does not cache negative replies, i.e., "no such domain" responses.
Additional servers file text file; default: none Uploads an additional DNS 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 off | on; default: off When enabled, DNS servers will be queried in the order of the resolve file.
All Servers off | on; default: off When enabled, queries all available upstream DNS servers.
Bogus NX Domain Override ip; default: none List of hosts that supply bogus NX domain results.
DNS server port integer [0..65535]; default: none Listening port for inbound DNS queries.
DNS query port integer [0..65535]; default: none Fixed source port for outbound DNS queries.
Max. EDNS0 packet size integer [0..9999999999999999]; default: none Maximum allowed size of Extension Mechanisms for Domain Name System.0 UDP packets.
Max. concurrent queries integer [0..9999999999999999]; default: none Maximum allowed number of concurrent DNS queries.
Size of DNS query cache integer [0..10000]; default: none Number of cached DNS entries. Set to 0 for no caching.