why my http redirect don't work with nagios?

I have a webserver with nagios, nagios is the only service working in this vm, so I want when I go to the root https://mymachine to redirect directly to https://mymachine/nagios.I have made a configuration like this

<VirtualHost *:443>   ServerName mymachine.mydomain   ServerAdmin root@mymachine.mydomain   Redirect / https://mymachine.mydomain/nagios   # SSL Engine Switch:   # Enable/Disable SSL for this virtual host.   SSLEngine on   SSLCertificateFile /etc/pki/tls/certs/nagios1.mymachine.mydomain.crt   SSLCertificateKeyFile /etc/pki/tls/private/nagios1mymachine.mydomain.key   SSLCACertificateFile /etc/pki/tls/certs/mymachine.mydomain.crt</VirtualHost>

Restart http and..disaster! Firefox open the page

https://nagios1.mymachine.mydomain/nagiosnagiosnagiosnagiosnagiosnagiosnagiosnagiosnagiosnagiosnagiosnagiosnagiosnagiosnagiosnagiosnagiosnagiosnagios

and give the "redirect loop" error.Consider I have also a redirect from http to httpsactive

RewriteEngine OnRewriteCond %{HTTPS} offRewriteRule (.*) https://%{SERVER_NAME}/$1 [R,L]

If I remove it is the same thing.Any solution?Thanks