CentOS 端口转发的问题，求帮助

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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

[小笨和漂向北方]

have u done this yet? sysctl -w net.ipv4.ip_forward=1 make sure you enable ip forwarding first then here is a good reference https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/4/html/Security_Guide/s1-firewall-ipt-fwd.html

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引用 1 楼 micropentium6 的回复:

have u done this yet? sysctl -w net.ipv4.ip_forward=1 make sure you enable ip forwarding first then here is a good reference https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/4/html/Security_Guide/s1-firewall-ipt-fwd.html

是这样的192.168.1.110的端口是通过路由器隐射过去的8080 我希望通过外网的域名访问8080端口好像不行啊

[小笨和漂向北方]

引用 2 楼 henry3695 的回复:

[quote=引用 1 楼 micropentium6 的回复:] have u done this yet? sysctl -w net.ipv4.ip_forward=1 make sure you enable ip forwarding first then here is a good reference https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/4/html/Security_Guide/s1-firewall-ipt-fwd.html

是这样的192.168.1.110的端口是通过路由器隐射过去的8080 我希望通过外网的域名访问8080端口好像不行啊 [/quote] there will be a lot of places that things could go wrong. ur switch first, then the firewall of ur network, then the iptable rules...

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little difct give some help