sheerdns-ng
===========

sheerdns-ng is a fork of an old sheerdns (http://threading.2038bug.com/sheerdns/) with few enhancements, such as: 
- run at chroot
- reply default responses for any DNS queries


INSTALLATION:
Simply type:
 $ make <ENTER>
 $ make install


USAGE:
Run a sheerdns server:
 $ ./sheerdns <ENTER>

To run in a background:
 $ ./sheerdns -d <ENTER>


EXAMPLES:
- setup default responses for any queries

 $ echo 192.168.2.1 > /var/sheerdns/default/A
 $ dig -t A www.google.com @localhost
 
 ; <<>> DiG 9.7.3 <<>> -t A www.google.com @localhost
 ;; global options: +cmd
 ;; Got answer:
 ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 38683
 ;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
 ;; WARNING: recursion requested but not available

 ;; QUESTION SECTION:
 ;www.google.com.			IN	A

 ;; ANSWER SECTION:
 www.google.com.		86400	IN	A	192.168.2.1

 ;; Query time: 0 msec
 ;; SERVER: 127.0.0.1#53(127.0.0.1)
 ;; WHEN: Tue Oct 23 01:06:45 2012
 ;; MSG SIZE  rcvd: 48

 $ dig -t A aol.com @localhost

 ; <<>> DiG 9.7.3 <<>> -t A aol.com @localhost
 ;; global options: +cmd
 ;; Got answer:
 ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 11448
 ;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
 ;; WARNING: recursion requested but not available

 ;; QUESTION SECTION:
 ;aol.com.			IN	A

 ;; ANSWER SECTION:
 aol.com.		86400	IN	A	192.168.2.1

 ;; Query time: 2 msec
 ;; SERVER: 127.0.0.1#53(127.0.0.1)
 ;; WHEN: Tue Oct 23 01:07:47 2012
 ;; MSG SIZE  rcvd: 41

As you can see above sheerdns replied for any 'A' queries that isn't at /var/sheerdns/XY/domainname/A with default 'A' value from /var/sheerdns/default/A

- Add aol.com into sheerdns

 $ echo 207.200.74.38 > /var/sheerdns/`./sheerdnshash aol.com`/aol.com/A
 $ dig -t A aol.com @localhost

 ; <<>> DiG 9.7.3 <<>> -t A aol.com @localhost
 ;; global options: +cmd
 ;; Got answer:
 ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 42306
 ;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
 ;; WARNING: recursion requested but not available

 ;; QUESTION SECTION:
 ;aol.com.			IN	A

 ;; ANSWER SECTION:
 aol.com.		86400	IN	A	207.200.74.38

 ;; Query time: 0 msec
 ;; SERVER: 127.0.0.1#53(127.0.0.1)
 ;; WHEN: Tue Oct 23 01:12:21 2012
 ;; MSG SIZE  rcvd: 41

As you can see above sheerdns replied with IP 207.200.74.38 for 'A' query for aol.com

For more examples please read sheerns-ng.html