Our company owns multiple tld's for our corporate domain (e.g. company.com, company.net, etc.). Currently, we operate the main website at "company.com".
To have "company.net" et al forward/redirect to "company.com", should we use a 301 redirect or setup a ServerAlias in Apache's virtual host directive (we use name-based virtual hosting on Ubuntu Server).
Are there any SEO penalties from one approach vs. the other (e.g. Google thinking you have multiple sites with the same contact + flagging it as spam)?
Thanks for the help.