DNS filtering intercepts domain lookup requests before a connection is established — blocking phishing sites, malware callbacks, and ransomware staging infrastructure before any code executes or credential is entered. Unlike EDR (which catches threats after a file lands) or email filtering (which blocks attachments before delivery), DNS filtering operates at the network layer and covers every device, including those that aren't patched. This article covers what DNS filtering blocks, how it fits into a layered security stack, the visibility it provides for compliance audit trails, and deployment considerations for distributed and remote teams.
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A financial services firm discovered its breach six weeks after it happened — an employee on a home network had clicked a credential-harvesting link, and the attacker moved laterally through shared drives without triggering any alerts because the login came from a recognized account. Remote work distributes your attack surface across every home office, coffee shop, and hotel network employees connect from. This article covers the specific exposure remote work creates (unsecured networks, unmanaged devices, MFA fatigue attacks, shadow IT) and the controls that address each: EDR with MDM, VPN with DNS filtering, phishing-resistant MFA, RBAC, and SIEM monitoring.