dns-infra-check

dns-infra-check

A work in progress tool to verify that DNS infrastructure is working properly. It's kind of a mash up of host or dig.

Usage of dns-infra-check:

By default you can simply run dns-infra-check with a list of domain names. It will parse /etc/resolv.conf and test each domain against each server.

$ dns-infra-check example.com example.org

It also supports the following arguments

  -6
        Perform NS record checks against any AAAA records
  -ns value
        Additional name servers to query
  -retries int
        Number of retries (default 3)
  -skipnschecks
        Skip the NS record checks, only run queries for the A records
  -timeout duration
        timeout for queries (default 5s)

Example output:

$ ./dns-infra-check -ns 8.8.8.8 eff.org
2016/08/24 13:08:34 Checking eff.org.
2016/08/24 13:08:34   Looking up eff.org. using local server 192.168.2.1:53
2016/08/24 13:08:34     Got response eff.org.	300	IN	A	69.50.232.54
2016/08/24 13:08:34   looking up NS records for eff.org. against 192.168.2.1:53
2016/08/24 13:08:34     Got response ns1.eff.org.
2016/08/24 13:08:34     Looking up A record for NS ns1.eff.org. using local server 192.168.2.1:53
2016/08/24 13:08:35       Got response 173.239.79.201
2016/08/24 13:08:35       Looking up A record for eff.org. using server 173.239.79.201:53
2016/08/24 13:08:35         Got response eff.org.	300	IN	A	69.50.232.54
2016/08/24 13:08:35     Got response ns6.eff.org.
2016/08/24 13:08:35     Looking up A record for NS ns6.eff.org. using local server 192.168.2.1:53
2016/08/24 13:08:35       Got response 69.50.232.54
2016/08/24 13:08:35       Looking up A record for eff.org. using server 69.50.232.54:53
2016/08/24 13:08:40     Error (retry 1/3) looking up eff.org. against 69.50.232.54:53: read udp 192.168.2.144:50745->69.50.232.54:53: i/o timeout
2016/08/24 13:08:46     Error (retry 2/3) looking up eff.org. against 69.50.232.54:53: read udp 192.168.2.144:53158->69.50.232.54:53: i/o timeout
2016/08/24 13:08:53         Error looking up eff.org. against 69.50.232.54:53: read udp 192.168.2.144:56428->69.50.232.54:53: i/o timeout
2016/08/24 13:08:53     Got response ns2.eff.org.
2016/08/24 13:08:53     Looking up A record for NS ns2.eff.org. using local server 192.168.2.1:53
2016/08/24 13:08:53       Got response 69.50.225.156
2016/08/24 13:08:53       Looking up A record for eff.org. using server 69.50.225.156:53
2016/08/24 13:08:53         Got response eff.org.	300	IN	A	69.50.232.54
2016/08/24 13:08:53   Looking up eff.org. using local server 8.8.8.8:53
2016/08/24 13:08:53     Got response eff.org.	50	IN	A	69.50.232.54
2016/08/24 13:08:53   looking up NS records for eff.org. against 8.8.8.8:53
2016/08/24 13:08:53     Got response ns2.eff.org.
2016/08/24 13:08:53     Looking up A record for NS ns2.eff.org. using local server 8.8.8.8:53
2016/08/24 13:08:53       Got response 69.50.225.156
2016/08/24 13:08:53       Skipping duplicate lookup A record for eff.org. using server 69.50.225.156:53
2016/08/24 13:08:53     Got response ns1.eff.org.
2016/08/24 13:08:53     Looking up A record for NS ns1.eff.org. using local server 8.8.8.8:53
2016/08/24 13:08:53       Got response 173.239.79.201
2016/08/24 13:08:53       Skipping duplicate lookup A record for eff.org. using server 173.239.79.201:53
2016/08/24 13:08:53     Got response ns6.eff.org.
2016/08/24 13:08:53     Looking up A record for NS ns6.eff.org. using local server 8.8.8.8:53
2016/08/24 13:08:53       Got response 69.50.232.54
2016/08/24 13:08:53       Skipping duplicate lookup A record for eff.org. using server 69.50.232.54:53