Difference between revisions of "Setting up unbound DNS server"

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m (Set auto-start, start and test the daemon)
m (Configure)
Line 13: Line 13:
 
server:
 
server:
 
         verbosity: 1
 
         verbosity: 1
 +
## Specify the interface address to listen on:
 
         interface: 10.0.0.1
 
         interface: 10.0.0.1
 
## To listen on all interfaces use the following line instead
 
## To listen on all interfaces use the following line instead
Line 26: Line 27:
 
## 'action' should be replaced by any one of:
 
## 'action' should be replaced by any one of:
 
#deny (drop message)
 
#deny (drop message)
#refuse (polite error reply)
+
#refuse (sends  a  DNS  rcode REFUSED error message back)
 
#allow (recursive ok)
 
#allow (recursive ok)
 
#allow_snoop (recursive and nonrecursive ok).
 
#allow_snoop (recursive and nonrecursive ok).
 +
## Minimum lifetime of cache entries in seconds.  Default is 0.
 +
#cache-min-ttl: 60
 +
## Maximum lifetime of cached entries. Default is 86400 seconds (1  day).
 +
#cache-max-ttl: 172800
 
python:
 
python:
 
remote-control:
 
remote-control:

Revision as of 21:00, 11 November 2013

Unbound is a validating, recursive, and caching DNS resolver that supports DNSSEC.

Install

Install the unbound package:

apk add unbound

Configure

The following configuration is an example of a caching name server (in a production server, it's recommended to adjust the access-control parameter to limit access to your network). The forward-zone(s) section will forward all DNS queries to the specified servers.

  • /etc/unbound/unbound.conf
server:
        verbosity: 1
## Specify the interface address to listen on:
        interface: 10.0.0.1
## To listen on all interfaces use the following line instead
#       interface: 0.0.0.0
        do-ip4: yes
        do-ip6: no
        do-udp: yes
        do-tcp: yes
        do-daemonize: yes
        access-control: 0.0.0.0/0 allow
## Other access control examples
#access-control: 192.168.1.0/24 action
## 'action' should be replaced by any one of:
#deny (drop message)
#refuse (sends  a  DNS  rcode REFUSED error message back)
#allow (recursive ok)
#allow_snoop (recursive and nonrecursive ok).
## Minimum lifetime of cache entries in seconds.  Default is 0.
#cache-min-ttl: 60
## Maximum lifetime of cached entries. Default is 86400 seconds (1  day).
#cache-max-ttl: 172800
python:
remote-control:
        control-enable: no
##enable to not answer id.server and hostname.bind queries. 
        hide-identity: yes
##enable to not answer version.server and version.bind queries. 
        hide-version: yes
## Note for forward zones, the destination servers must be able to handle recursion to other DNS server
## Forward all *.example.com queries to the server at 192.168.1.1
#forward-zone:
#        name: "example.com"
#        forward-addr: 192.168.1.1
## Forward all other queries to the Verizon DNS servers
forward-zone:      
        name: "."
# Level3 Verizon
        forward-addr: 4.2.2.1
        forward-addr: 4.2.2.4

Set auto-start, start and test the daemon

Set to auto-start then start unbound:

rc-update add unbound rc-service unbound start

Test, for example:

dig nl.alpinelinux.org @10.0.0.1

or:

nslookup www.google.cz @10.0.0.1