Linux DNS Server

[Karl Kleinpaste]

"amasso" <amasso at ondemandsi.com> writes:
> From an external machine I can't ping ns1.my-domain.com.
> Am I doing something wrong? 

Has your registrar been notified that your DNS server is now operating
on ns1.my-domain.com?  The registrars are the conduit for how the DNS
root gets populated.  Until you change your DNS servers with your
registrar, you have merely a locally-configured server, unknown to the
greater DNS.