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/ptCoqy7wkH #SecureYourSMB pic.twitter.com/yCigwksZk3— US-CERT (@USCERT_gov) June 30, 2021