Timeouts on Servers not connected to the Internet

Checking certificate revocation lists may be the problem as described on SamlMan:

CAPI2 logging is not enabled by default. To enable it, right-click the CAPI2 Operational log in Event Viewer and select Enable Logging. You can also enable it using Wevtutil:
wevtutil.exe sl Microsoft-Windows-CAPI2/Operational /e:true
To disable it with Wevtutil the syntax is:
wevtutil.exe sl Microsoft-Windows-CAPI2/Operational /e:false

Weiterführende Links:

  • https://blogs.msdn.microsoft.com/chaun/2014/05/01/best-practices-for-crl-checking-on-sharepoint-servers/