Web portal and supported web pages

Hello,

a. I have configured a number of HTTP/HTTPS bookmarks at a web portal for SSL VPN access and I have noticed that a lot of them do not work at all. I understand that web-only mode SSL VPN has limitations in the type of web pages supported, but I don't know what exactly these limitations are. Can somebody inform me about which type of web pages do not work well (or do not work at all) in web-only mode?

b. Can somebody give me a working config for SSO in a web-only mode bookmark, for static or alternative login?

Thanks