[PVE-User] Can I change port number 8006?

[ribbon]

Proxmox VE2.1 is using the port number 8006. 
Is changing this port number into 443 possible? 
The firewall which I am using does not pass port number 8006. 
Therefore, I would like to change a port number.
In /etc/apache2/site-available/pve.conf,

Listen 8006
<VirtualHost *:8006>
    SSLEngine on
    SSLProtocol all -SSLv2
    SSLCertificateFile /etc/pve/local/pve-ssl.pem
    SSLCertificateKeyFile /etc/pve/local/pve-ssl.key

If this 8006 change to 443,probrem is fix?

oota