yum install -y --enablerepo=epel openswan xl2tpd bind
Configure /etc/named.conf and the zone file /var/named/masters/commonidtrust.org (see examples attached). Configure xl2tpd and Openswan.
chkconfig named on
chkconfig ipsec on
chkconfig xl2tpd on
Recursion is disabled and rate limiting is set at 5 per second. Since there are a total of 3 records, this is basically impossible to use in any form of attack, ever, and it's in a personal account anyway.
named logs to /var/log/messages
This is configured to serve up the A and/or CNAME records for account.commonidtrust.org, helpdesk.commonidtrust.org, and login.commonidtrust.org for the specific VPC environment.
pretty much just stole http://www.stormacq.com/build-a-private-vpn-server-on-amazons-ec2/