Securing Out-of-Band (OOB) Access with Zscaler Cellular
Zscaler, Tuesday, August 5th, 2025
In an environment where uninterrupted access to critical infrastructure can define operational success or failure, Out-of-Band (OOB) access is a necessity, not a luxury.
Yet, many enterprises still rely on legacy approaches-most often traditional VPNs or complex cellular deployments with Private APNs-that introduce new risks and operational burdens as environments expand and regulatory requirements become stricter.
The core challenge with these conventional solutions is two-fold: expanded attack surfaces and growing complexity. VPN-based OOB setups inherently broaden network exposure, providing overly permissive access that can swiftly be exploited for lateral movement, ransomware, or advanced persistent threats.