Hi @ZhouYu ,
According to the help docs
SSL Activity—Displays the activity of decrypted and undecrypted TLS/SSL traffic based on your Decryption policies and profiles. You can see TLS activity compared to non-TLS activity, the amount of decrypted traffic versus the amount of undecrypted traffic, reasons for decryption failures, and successful TLS version and key exchange activity.
This means that "Other" refer to all other traffic that has been processed by the firewall, but was not encrypted with SSL/TLS
Click Accept as Solution to acknowledge that the answer to your question has been provided.
The button appears next to the replies on topics you’ve started. The member who gave the solution and all future visitors to this topic will appreciate it!
These simple actions take just seconds of your time, but go a long way in showing appreciation for community members and the LIVEcommunity as a whole!
The LIVEcommunity thanks you for your participation!