As of September 30 2021, there is a change in how older devices and browsers handle SSL certificates across the internet. Older devices/browsers might display security warnings that say something to the effect of: “Your connection is not fully secure. This site uses an outdated security configuration, which may expose your information."
As a SiteSwan reseller, you most likely will not notice anything because the vast majority of browsers and devices will not be affected. However, if someone visiting one of your sites mentions a security warning, you may want to advise them to update their browser or device. Keep in mind that if the user is noticing a security warning on a SiteSwan site, they're likely going to also see security warnings on lots of other sites they visit. This is issue is not exclusive to SiteSwan sites.
To our knowledge, the systems that might cause issues with SSL certificates as described above are very rarely used by the majority of typical internet users. Here’s a current list of systems we know to be incompatible:
- Blackberry < v10.3.3
- Android < v2.3.6
- Nintendo 3DS
- Windows XP prior to SP3
- cannot handle SHA-2 signed certificates
- Java 7 < 7u111
- Java 8 < 8u101
- Windows Live Mail (2012 mail client, not webmail)
- cannot handle certificates without a CRL
- PS3 game console
- PS4 game console with firmware < 5.00
- macOS < 10.12.1 (released 2016)
- iOS < 10 (released 2016)
- iPhone < 5 (released 2012)
- Firefox < 50 (released 2016)
Accessing the internet from updated browsers / devices is always best practice for various security reasons, so it's wise for anyone using one of these older technologies to upgrade regardless.