CentOS 7 firewall-cmd Command Detailed introduction _linux

Source: Internet
Author: User
Tags ssh centos bacula

CentOS 7 firewall-cmd Command

Centos 7 firewall commands

In CentOS 7

Centos 7 firewall cmd

Open FTP Service temporarily
# Firewall-cmd--add-service=ftp

Permanent Open FTP Service
# Firewall-cmd--add-service=ftp--permanent

How to open firewall in centos 7

Permanently closed
# Firewall-cmd--remove-service=ftp--permanent

Let the settings take effect
# systemctl Restart Firewalld

Turn on firewall centos 7

Check that the settings are in effect
# iptables-l-N | grep 21
ACCEPT TCP-- TCP dpt:21 ctstate NEW

Check firewall status
# Firewall-cmd--state

Enable port firewall centos 7

# Systemctl Stop Firewalld
# Firewall-cmd--state
Not running

How to check firewall rules in centos 7

# firewall-cmd--list-all public
 services:dhcpv6-client ftp ssh
 Rich rules:

Name of service in FIREWALLD

# firewall-cmd--get-service
amanda-client bacula bacula-client dhcp DHCPv6 dhcpv6-client DNS FTP 
High-availability http HTTPS imaps IPP ipp-client IPSec Kerberos kpasswd 
LDAP ldaps libvirt libvirt-tls MDNs mountd m S-WBT MySQL NFS ntp openvpn
 pmcd pmproxy pmwebapi pmwebapis pop3s postgresql proxy-dhcp radius 
rpc-bind Samba SA mba-client smtp ssh telnet tftp tftp-client transmission-client vnc-server Wbem-https

The enabled state of the query service
# Firewall-cmd--query-service FTP
# firewall-cmd--query-service SSH
# Firewall-cmd--query-service Samba
# Firewall-cmd--query-service http

Join the Port you want to open yourself

# firewall-cmd--add-port=3128/tcp
# firewall-cmd--list-all public
 services:dhcpv6-client ftp ssh
 Rich rules:

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