linux – NAT后关闭源IP

但随着流量每天都在增长,我不得不安装Linux服务器(Debian)来共享我的Internet连接,因为我的旧路由器无法再保持流量.
我通过IPTABLES使用NAT共享互联网,但是现在,在将端口80转发到我的网络服务器之后,现在我没有看到真正的用户IP,而是将我的网关IP(Linux内部IP)视为任何用户IP地址.

如何解决这个问题？

我编辑了我的帖子,所以我可以粘贴我目前正在使用的规则.

#!/bin/sh
#I made a script to set the rules

#I flush everything here.
iptables --flush
iptables --table nat --flush
iptables --delete-chain
iptables --table nat --delete-chain
iptables -F
iptables -X


# I drop everything as a general rule,but this is disabled under testing
# iptables -P INPUT DROP
# iptables -P OUTPUT DROP


# these are the loopback rules
iptables -A INPUT -i lo -j ACCEPT
iptables -A OUTPUT -o lo -j ACCEPT

# here I set the SSH port rules,so I can connect to my server
iptables -A INPUT -p tcp --sport 513:65535 --dport 22 -m state --state NEW,ESTABLISHED     -j ACCEPT
iptables -A OUTPUT -p tcp --sport 22 --dport 513:65535 -m state --state ESTABLISHED -j ACCEPT


# These are the forwards for 80 port
iptables -t nat -A PREROUTING -p tcp -s 0/0 -d xx.xx.xx.xx --dport 80 -j DNAT --to     192.168.42.3:80
iptables -t nat -A POSTROUTING -o eth0 -d xx.xx.xx.xx -j SNAT --to-source 192.168.42.3
iptables -A FORWARD -p tcp -s 192.168.42.3 --sport 80 -j ACCEPT

# These are the forwards for bind/dns
iptables -t nat -A PREROUTING -p udp -s 0/0 -d xx.xx.xx.xx --dport 53 -j DNAT --to 192.168.42.3:53
iptables -t nat -A POSTROUTING -o eth0 -d xx.xx.xx.xx -j SNAT --to-source 192.168.42.3
iptables -A FORWARD -p udp -s 192.168.42.3 --sport 53 -j ACCEPT


# And these are the rules so I can share my internet connection
iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
iptables -A FORWARD -i eth0:1 -j ACCEPT

如果我删除MASQUERADE部分,我会看到我的真实IP,同时用PHP回应它,但我没有互联网.怎么做,有网络,看到我的真实IP,而端口也被转发？

** xx.xx.xx.xx – 是我的公共IP.我出于安全原因隐藏了它.