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IP Tables State

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24/7 Network Engineers came across a situation where the server intermittently became inaccessible. After troubleshooting the issue, they came to know that a few IP addresses were hammering the server, due to which legitimate connections were rejected.

IPTState is a utility that shows net filter connection tracking table in a “Top” format. It keeps an eye on traffic crossing net filter/Iptables firewall, interactively. It is very informative while tracking the network connection as well as the vulnerability of code for deployment.
24/7 Network Engineers deployed a script and automated the IPTState in such a way that it runs in reporting mode. After analyzing the report, they established the server was deployed with a vulnerable code that initiated multiple crons. These crons were running every minute to establish connections. The client asked to fix the code and a report for scheduling mail every day.


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