daemon waits for nameserver queries on
a user specified address, dispatches these queries to authoritative and
recursive nameservers and forwards the received answers back to the original
The options are as follows:
- Read configuration from file.
- Detach from current terminal and run as background
- Show usage.
- Show version.
If a client from an internal IP address does a recursive lookup the query is
forwarded to a recursive DNS server. Authoritative queries and queries coming
from clients in foreign networks are forwarded to an authoritative DNS server.
At startup dnsproxy
reads a configuration file
specified via the -c option or at the default location of /etc/dnsproxy.conf.
The following keywords are recognized:
- authoritative IP
- Address of the authoritative nameserver [required].
- recursive IP
- Address of the recursive nameserver [required].
- listen IP
- Local address (defaults to 0.0.0.0).
- port number
- Local port number (defaults to 53).
- chroot path
- A path to chroot to before starting to answer
- user name
- A user to change to before starting to answer
- Time in seconds when authoritative queries time out
(defaults to 10).
- Time in seconds when recursive queries time out (defaults
- Port number on authoritative nameserver (defaults to
- Port number on recursive nameserver (defaults to
- statistics seconds
- Period between output of statistics (defaults to 3600).
Use 0 to disable output of statistics completely.
- internal network
- Declare networks recognized as internal and thus eligible
to do recursive queries. One network in CIDR notation per keyword.
Every hour (by default) dnsproxy
logs the collected
statistics about its usage to standard error (or syslog when running
detached). Statistics look like
ActiveQr AuthorQr RecursQr AllQuery Answered
0 0 0 0 0
TimeoutQ DroppedQ DroppedA LateAnsw HashColl
0 0 0 0 0
and have the following meaning:
- Number of currently active queries proxied to the
- Accumulated number of authoritative queries.
- Accumulated number of recursive queries.
- Accumulated number of all queries ever received.
- Accumulated number of answered queries.
- Accumulated number of queries that did not receive an
answer in time.
- Accumulated number of dropped queries (e.g. transmission
- Accumulated number of dropped answers.
- Accumulated number of answers received after the timeout
- Accumulated number of hash collisions in the query
This manual page describes dnsproxy
Armin Wolfermann <firstname.lastname@example.org>
homepage is at