SSL VPN, WAF and port 443 conflict

Hello,

Correct me if I'm wrong but currently you can't have SSL VPN running on port 443 if there are WAF active, even on diferent public IP's then default GTW.

Using SSL VPN on different port then 443 makes no sense as normally the rest of the ports like 8443, 9443, 4443 etc is blocked by firewalls around the globe.

So we need to choose to use SSL VPN or WAF? Is there a work around?

Thanks

Zee