how to enable port 22 in centos 7 code example
Example: open port 22 centos 7
firewall-cmd --zone=public --add-port=22/tcp --permanent
firewall-cmd --reload
iptables-save | grep 22
firewall-cmd --zone=public --remove-port=22/tcp --permanent
firewall-cmd --reload
service iptables status
service iptables start
chkconfig --list iptables
chkconfig iptables on
iptables -L
iptables -A INPUT -i eth0 -p tcp --dport 22 -j ACCEPT
iptables -D INPUT -i eth0 -p tcp --dport 22 -j ACCEPT
iptables-save | grep 22