NIC configuration methods
1、vim /etc/sysconfig/network-scripts/ifcfg-eno1677728
systemctl restart network
2, nmtui
3、nm-connection-editor
Allowing the release of ACCEPT
Reject REJECT
Refused DROP
Log LOG
iptables -L to list all rules
iptables -F Empty matching rule
iptables -A written subsequently to the rule
iptables -P INPUT DROP modify the matching rule
iptables -I INPUT -s 192.168.10.1/24 -p tcp --dport 22 -j ACCEPT inserted in front of a matching rule
iptables -D INPUT 2 second deletion policy
From top to bottom match match will end to
Disable port number
--dport 22
--dport 22:80
[root@linuxprobe ~]# iptables -I INPUT -p tcp --dport 12345 -j REJECT
[root@linuxprobe ~]# iptables -A INPUT -p tcp --dport 1000:1024 -j REJECT