Users report me problems, when they launch web-browser with a website in https, captive portal is not shown and they can not surf on internet, but if they go into http website the captive portal is working. why is not being showed the captive portal in https webs?
Decryption is not specific for captive portal but it is for all kind of traffic passing through the firewall. Check the following document. You can prevent some traffic from being decrypted by creating a no decrypt rule.
For SSL sites to work properly in captive portal you should have decryption enabled and will need to have the captive portal set to redirect to a dataplane interface, preferably using a hostname that can be resolved internally and a certificate for that hostname
ssl decryption policy would ideally be any any 443 decrypt BUT if this is undesirable you could work with a certain URL category destination which could be a custom category with a URL each user needs to visit before being allowed to browse out, or 'obvious' categories for the first page in most people's browsers like 'search-engine' or 'news'
Its weird, because i dont have this problem and i dont have a SSL decrypt policy in my Palto.
For example, if users go to http://www.google.es the captive portal is showed and they can log in. However, if they go to https://www.google.es nothing is showed and they can not logging (the page shows nothing).
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