CentOS 端口转发的问题，求帮助

2014-10-06 11:07:07 395 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

Centos7配置端口转发功能 Centos7配置端口转发功能配置端口转发的目的操作如下配置端口转发的目的将外网访问端口的流量转发到内网的端口,本篇文章使用的是阿里云服务器，将外网的30306端口流量转发到内网的3306端口操作如下 //1.看下防火墙状态 systemctl status firewalld ● firewalld.service - firewalld - dynamic firewall daemon Loaded: loaded (/usr/lib/systemd/system/firewalld.se 阅读详情

iptables中的内容

# Generated by iptables-save v1.3.5 on Mon Oct 6 07:55:24 2014
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [457:46034]
:RH-Firewall-1-INPUT - [0:0]
-A INPUT -j RH-Firewall-1-INPUT
-A INPUT -p tcp -m tcp --dport 8080 -j ACCEPT
-A FORWARD -j RH-Firewall-1-INPUT
-A RH-Firewall-1-INPUT -i lo -j ACCEPT
-A RH-Firewall-1-INPUT -p icmp -m icmp --icmp-type any -j ACCEPT
-A RH-Firewall-1-INPUT -p esp -j ACCEPT
-A RH-Firewall-1-INPUT -p ah -j ACCEPT
-A RH-Firewall-1-INPUT -d 224.0.0.251 -p udp -m udp --dport 5353 -j ACCEPT
-A RH-Firewall-1-INPUT -p udp -m udp --dport 631 -j ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m tcp --dport 631 -j ACCEPT
-A RH-Firewall-1-INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m state --state NEW -m tcp --dport 9999 -j ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m state --state NEW -m tcp --dport 8080 -j ACCEPT
-A RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited
COMMIT
# Completed on Mon Oct 6 07:55:24 2014
# Generated by iptables-save v1.3.5 on Mon Oct 6 07:55:24 2014
*nat
:PREROUTING ACCEPT [7:224]
:POSTROUTING ACCEPT [18:1350]
:OUTPUT ACCEPT [18:1350]
-A PREROUTING -p tcp -m tcp --dport 8080 -j DNAT --to-destination 192.168.1.100:1521
-A POSTROUTING -p tcp -m tcp --dport 1521 -j SNAT --to-source 192.168.1.110
COMMIT
# Completed on Mon Oct 6 07:55:24 2014

##**********************************************************
#本地网卡IP 192.168.1.110
#我想实现访问192.168.1.110:8080的时候，端口转发到192.168.1.100:1521（是web服务）
#为啥如上面设置不行

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