Firewall Linux

Introduction

Это статья про firewall Linux про firewall Windows читайте здесь

Basics

Разберем firewalld из CentOS

To check status

firewall-cmd --state

running

Чтобы проверить настройки выполните

firewall-cmd --list-all

public (active)
target: default
icmp-block-inversion: no
interfaces: enp0s3 enp0s8
sources:
services: dhcpv6-client http https ssh
ports: XXXX/tcp XXYY/tcp YYYY/tcp
protocols:
masquerade: no
forward-ports:
source-ports:
icmp-blocks:
rich rules:

Check if ntp service is in active zone

sudo firewall-cmd --get-services | grep ntp

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