Ki?m tra tr?ng thái Firewall

systemctl status firewalld

Ho?c

firewall-cmd --state

N?u k?t qu? là:

running

thì Firewall ?ang ho?t ??ng.

 

M? m?t Port

Ví d? m? port 8888

firewall-cmd --permanent --add-port=8888/tcp

M? port UDP

firewall-cmd --permanent --add-port=8888/udp

M? nhi?u Port

Ví d?:

firewall-cmd --permanent --add-port=80/tcp
firewall-cmd --permanent --add-port=443/tcp
firewall-cmd --permanent --add-port=8888/tcp
firewall-cmd --permanent --add-port=3306/tcp

M? d?i Port

Ví d? m? FTP Passive

firewall-cmd --permanent --add-port=39000-40000/tcp

Reload Firewall

Sau khi thêm Port

firewall-cmd --reload

Ki?m tra Port ?ã m?

firewall-cmd --list-ports

Ví d? k?t qu?

80/tcp 443/tcp 8888/tcp 3306/tcp

M? d?ch v? thay vì Port

HTTP

firewall-cmd --permanent --add-service=http

HTTPS

firewall-cmd --permanent --add-service=https

FTP

firewall-cmd --permanent --add-service=ftp

Reload

firewall-cmd --reload

Xóa Port

Ví d? xóa port 8888

firewall-cmd --permanent --remove-port=8888/tcp
firewall-cmd --reload

Ki?m tra t?t c? c?u hình Firewall

firewall-cmd --list-all

N?u Firewall ch?a cài

Ki?m tra

rpm -q firewalld

Cài ??t

yum install firewalld -y

Kh?i ??ng

systemctl enable firewalld
systemctl start firewalld

T?t Firewall (không khuy?n ngh?)

T?m th?i

systemctl stop firewalld

T?t khi kh?i ??ng

systemctl disable firewalld

Các Port th??ng dùng

D?ch v?PortSSH22HTTP80HTTPS443aaPanel8888MySQL3306Redis6379FTP21Passive FTP39000–40000Node.js3000PM2 App3000–9999 (tùy ?ng d?ng)

Ví d? m? các port ph? bi?n cho máy ch? web

firewall-cmd --permanent --add-service=http
firewall-cmd --permanent --add-service=https
firewall-cmd --permanent --add-port=8888/tcp
firewall-cmd --permanent --add-port=22/tcp
firewall-cmd --reload