eBook © 2023 Zscaler, Inc. All rights reserved. 7 Symptoms Your Legacy Firewall Isn’t Fit for Zero TrusteBook 2 © 2023 Zscaler, Inc. All rights reserved. Today’s IT security stakeholders are well aware that zero trust is the right security model for modern digital businesses. Surveys show that as many as 78% of enterprise security programs have either adopted zero trust network access or are planning to do so in the future. 1 They know that focusing directly on securing users, data, and applications—instead of the network—is key to protecting today’s data-driven, remote work-enabled enterprises. Decades ago, when hub-and-spoke network designs were state-of-the-art,  rewalls and the networking infrastructures built around them were young, spry, and healthy. They were the right t

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