Centos 7.5 network configuration, centos7.5 Configuration

Centos 7.5 network configuration, centos7.5 Configuration

1. The ifconfig command cannot be found.

Solution: install the net-tools.x86_64 toolkit yum install net-tools.x86_64

2. iptables cannot be used.

Solution: yum install iptables-services

 

Vi/etc/sysconfig/iptables # Configure Firewall Parameters

# Sample configuration for iptables service
# You can edit this manually or use system-config-firewall
# Please do not ask us to add additional ports/services to this default configuration
* Filter
: Input accept [0: 0]
: Forward accept [0: 0]
: Output accept [0: 0]
-A input-m state -- state RELATED, ESTABLISHED-j ACCEPT
-A input-p icmp-j ACCEPT
-A input-I lo-j ACCEPT
-A input-p tcp-m state -- state NEW-m tcp -- dport 22-j ACCEPT
-A input-j REJECT -- reject-with icmp-host-prohibited
-A forward-j REJECT -- reject-with icmp-host-prohibited
COMMIT

: Wq! # Save and exit

 

Systemctl restart iptables. service # restart the firewall to make the configuration take effect.

 

Systemctl enable iptables. service # Set firewall startup