![]() After all, why would a backup server legitimately need the IP address of a random machine on the internet? Disconnect the backup server from LDAP It's a major payback from a minor inconvenience. ![]() This may seem ridiculous, but it is the easiest way to stop ransomware that has infected your system. Consider using a local host file or a restricted DNS system that does not support external queries. If it is unable to do so, it can’t receive instructions about what to do next. The first thing ransomware does when it infects your backup server is contact its command-and-control server. Even users on the LAN should use the VPN. Only ports the backup software needs to perform backups and restores should be left open, and they should be accessible only via a VPN dedicated to the backup server. Disabling all but the necessary inbound ports can stop both. Backup servers get attacked in two ways-by exploiting a vulnerability or logging in using compromised credentials.
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