---
title: Cases About Network, OS, Firewall
slug: kronpam-support-and-maintenance-guides/cases-about-network-os-firewall
docTags: 
createdAt: 2024-07-24T12:46:14.796Z
---

Customers are responsible for the cases given below:


•	When the DNS server of the client cannot resolve any hostnames
•	When Network traffic reaches the threshold
•	When the Network interface disappears
•	When network interface names change after reboot
•	When an instance cannot synchronize time (NTP works incorrectly)
•	For issues/errors on a hard disk
•	For firewall rules preventing connections