OK to use domain name registrar to forward .net to .com?

[tr95]

I'm changing a site from .net to .com and wondered if it is safe to use the domain name registrar's forwarding to send .net to .com. When you type in name.net, it automatically redirects to name.com.

[encyclo]

Often this is not safe, as many domain registrars use either meta refreshes or 302 (temporary) redirects instead of the recommended 301 Permanent redirect.

You should park your secondary domain pointing to your primary site, then use mod_rewrite to 301 all server requests which are not to the primary URL.