root@ip-10-248-27-66:/home/ubuntu# puppetca --sign ec2-54-245-56-210.us-west-2.compute.amazonaws.com
err: Could not call sign: Could not find certificate request for ec2-54-245-56-210.us-west-2.compute.amazonaws.com

127.0.0.1 localhost puppetmaster
10.248.34.162 ec2-54-245-56-210.us-west-2.compute.amazonaws.com puppet

# The following lines are desirable for IPv6 capable hosts
::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts

127.0.0.1 localhost
10.248.27.66 ec2-50-112-220-110.us-west-2.compute.amazonaws.com puppetmaster

# The following lines are desirable for IPv6 capable hosts
::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts

root@ip-10-248-27-66:/home/ubuntu# service puppetmaster status
 * master is running

root@ip-10-248-34-162:/home/ubuntu# host puppetmaster
Host puppetmaster not found: 3(NXDOMAIN)

root@ip-10-248-34-162:/home/ubuntu# telnet puppetmaster 8140
Trying 10.248.27.66...
Connected to ec2-50-112-220-110.us-west-2.compute.amazonaws.com.
Escape character is '^]'.

Apr 11 17:57:41 ip-10-248-34-162 puppet-agent[3897]: Could not request certificate: getaddrinfo: Name or service not known

root@ip-10-248-34-162:/home/ubuntu# puppet agent --test
err: Could not request certificate: getaddrinfo: Name or service not known
Exiting; failed to retrieve certificate and waitforcert is disabled

$ getent hosts puppetmaster
10.248.27.66 ec2-50-112-220-110.us-west-2.compute.amazonaws.com puppetmaster

$ puppet agent --test --waitforcert 5
err: Could not request certificate: Connection refused - connect(2)
err: Could not request certificate: Connection refused - connect(2)

iptables -F
service service iptables save