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Behind the Wall: What Firewalls Really See, Block, and Miss

DEV Community·VickkyKruz NetSec·about 1 month ago
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Hi everyone 👋 Just a quick question to you. You have a firewall, right? Well, your IT team has probably done the setup. It's gone live. And now you think you're protected. But when was the last time you actually asked: what are the firewall's limitations? This is what a majority of security presentations won't disclose: → According to statistics, more than 90% of online traffic is encrypted and most of the time firewalls are not able to access it. → Firewalls are designed to regulate the flow of data primarily between the internal network and the internet (north-south). So intruders can freely move around within your network (east-west) without being detected. → According to research, 95% of the cases where unauthorized access to firewalls take place happen due to errors in the configuration and not because of highly skilled hackers. → In the incident of Capital One data breach in 2019, here were more than 100 million customer records compromised due to a single misconfigured rule.…

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