CentOS 7 firewall-cmd Command Detailed introduction _linux

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
Success





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--0.0.0.0/0 0.0.0.0/0 TCP dpt:21 ctstate NEW





Check firewall status
# Firewall-cmd--state
Running


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
(default)
 interfaces:
 Sources:
 services:dhcpv6-client ftp ssh
 Ports:
 masquerade:no
 forward-ports:
 icmp-blocks:
 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
Yes
# firewall-cmd--query-service SSH
Yes
# Firewall-cmd--query-service Samba
No
# Firewall-cmd--query-service http
No





Join the Port you want to open yourself



# firewall-cmd--add-port=3128/tcp
# firewall-cmd--list-all public
(default)
 interfaces:
 sources:
 services:dhcpv6-client ftp ssh
 ports:3128/tcp
 masquerade:no
 forward-ports:
 icmp-blocks:
 Rich rules:


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