Linux系统上经常会出现一些现象就是,安装好软件访问的时候,服务器连接不上,这个时候就要检查相应的端口是否打开了,例如,安装好svn后,连接不上:
svn服务启动了,在服务器上可以使用命令把文件检出,但是其他电脑上就无法检出,一直提示:
[root@nb home]# more /etc/sysconfig/iptables # Firewall configuration written by system-config-firewall # Manual customization of this file is not recommended. *filter :INPUT ACCEPT [0:0] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [0:0] -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT -A INPUT -p icmp -j ACCEPT -A INPUT -i lo -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 8080 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 3306 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 8009 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 8081 -j ACCEPT -A INPUT -m state --state NEW -m tcp -p tcp --dport 3690 -j ACCEPT -A INPUT -j REJECT --reject-with icmp-host-prohibited -A FORWARD -j REJECT --reject-with icmp-host-prohibited COMMIT [root@nb home]# /etc/init.d/iptables restart iptables:清除防火墙规则: [确定] iptables:将链设置为政策 ACCEPT:filter [确定] iptables:正在卸载模块: [确定] iptables:应用防火墙规则: [确定]
centos7中用命令:
systemctl start iptables.service 启动
systemctl stop iptables.service 停止
systemctl restart iptables.service 重启