Since you lovely nerds love pushing to prod on Fridays, here's a list of a little over 33,000 IPs you might want to look at blocking inbound, especially to any VPN portals. They were all recently observed by us attempting to log in ( not just scanning ) various VPN portals including F5 BIG-IP, Cisco SSLVPN, SonicWALL SSLVPN, Palo Alto GlobalProtect, and others. 
If you have a fediverse account, you can quote this note from your own instance. Search https://infosec.exchange/users/gayint/statuses/115748011711958160 on your instance and quote it. (Note that quoting is not supported in Mastodon.)