Remote web management

Hi,

looking for a way to remotely manage fortigate devices using web page, because I don't have Fortimanager. Remote fortigates are connected using ipsec tunnel, and when something happens with the tunnels I have no connection to the other side and am looking for a way to have emergency access.

I don't want to enable wan access with trusted hosts because I don't think this is secure. What's the best practice in scenario like mine? I thought about ssl vpn but could be set administration on ssl interface?