When a GRE tunnel is established, I know someone logged has in with success.
However, I get more than a 100 hits on port 443 every day. How can I log whether a SSTP tunnel has been established with success vs just another harmless port scanner driving by?
You can find users that logged in with success via below line of code, pasted in a terminal. Of course, appropriate logging should be enabled first in order for this to work.
log print detail where buffer=memory && message~"authenticated"
I can now try and write a script to condense the output to, for instance, TESTUSER logged in on dec/10 20:35:02 and feed this BACK into a log topic of choice.