URL redirection

[John Williams <john.1209@xxxxxxxxxxxxxxxxxxxxx>]

I need to redirect the contents of a URL site from (say) zzz.com  to (say) yyy.com/somepage.html.  I need to have port 80 and port 443 redirected.  So the requirement is:

http://zzz.com/ redirect to http://yyy.com/somepage.html:25999

AND

https://zzz.com/ redirect to https://yyy.com/somepage.html:25999

Will the following rule work?

<VirtualHost *:80>

  ServerName zzz.com

  DocumentRoot /var/www/html/zzz

  ServerAdmin webmaster@xxxxxxx

  ServerAlias www.zzz.com

  RewriteEngine On

  RewriteRule ^/$ http://yyy/somepage.html [R=301,NC,L]

  ErrorLog /var/log/httpd/zzz.error.log

</VirtualHost>

I tested it for port 80 redirection. That worked fine.  Will that also work for SSL?  Also, what does the [R=301,NC,L] imply?  That is a googled rule and I don't quite know what it does.

TIA