To help prevent #ransomware attacks, @CISAgov recommends users & administrators:
✔️Disable SMBv1
✔️Block all versions of #SMB at the network boundary by blocking TCP port 445 with related protocols on UDP ports 137-138 and TCP port 139 https://t.co/4awJTIwPGb #SecureYourSMB pic.twitter.com/JW8TvYmRcv— US-CERT (@USCERT_gov) April 22, 2021