Linux Note (1)

-A input-m state--state new-m tcp-p tcp-s dizhi--dport 6379-j ACCEPT
-A input-j REJECT--reject-with icmp-host-prohibited
-A forward-j REJECT--reject-with icmp-host-prohibited
COMMIT
Iptables-a input-p TCP--dport 22-j ACCEPT
CentOS 7
Firewall-cmd--zone=public--add-port=53/udp--permanent
Firewall-cmd--zone=public--remove-port=80/tcp--permanent
Firewall-cmd--zone=public--add-port=4400-4600/udp--permanent
#内核
Cat/proc/version
#版本
Cat/etc/redhat_release
Centos7
Systemctl Status/start/stop Firewalld
CentOS 6
Red Hat serivce iptables Status/stop/start
# Firewall rules
/etc/udev/rules.d/70-persistent-net.rules

1. View open ports (no ports are open by default)
Firewall-cmd--list-ports
2. Turn on port 80
Firewall-cmd--zone=public (Scope)--ADD-PORT=80/TCP (port and Access type)--permanent (permanent)
3. Restart the firewall
Firewall-cmd--reload
4. Stop the firewall
Systemctl Stop Firewalld.service
5. Disable the boot of the firewall
Systemctl Disable Firewalld.service
6. Delete
Firewall-cmd--zone=public--remove-port=80/tcp--permanent
7. White List
Firewall-cmd--add-rich-rule ' rule family= ' IPv4 ' source address= ' * ' Accept '--permanent

/etc/ssh/sshd_config
Rsaauthentication Yes
Pubkeyauthentication Yes
Authorizedkeysfile. Ssh/authorized_keys

#过滤ip
Vim/etc/hosts.allow

Service Services.msc

Linux Note (1)