How to identify insecure GUI connections

[Former Member]

Hello,

We have a requirement to secure below connection in our landscape [R/3 & BW both].
We already have SNC enabled in all the non production & production systems.

1 : RFC Connections
2 : GUI connections

--------------------------------
Recommanded parameter Values

snc/enable 1
snc/accept_insecure_gui 1
snc/only_encrypted_gui 1
--------------------------------
Recommanded parameter Values

snc/enable 1
snc/accept_insecure_rfc 1
snc/only_encrypted_rfc >=2
--------------------------------

We want to

1 : Understand what all insecure GUI connections are coming from users?
Is there any report/tcode through which we can find out the GUI connections which are insecure?
2 : If the GUI & RFC connections are secured using above parameters would SAP be able to connect through SAP OSS connections?
3 : If not then what would be the solution so that SAP can connnect through secure connection?
4 : What would be the other impact of these parameter changes.

Thank you, Regards,
Girish.