如何在 linux 上使用我自己的 pptp vpn 伺服器在 windows 的客戶端打開埠？

我已經pptpd在我的 vultr ubuntu 伺服器中設置了我自己的伺服器，我使用 Windows 中內置的客戶端連接它，我成功訪問了網際網路，當我檢查我的 ip 時，我看到的是 vps ip 而不是我的真實 ip，但是我的問題是當我嘗試使用名為的簡單工具在 Windows 客戶端中打開埠 portlistener並開始監聽埠 80 時，我使用了 checkport 工具，但我看到埠 80 已關閉。那麼有誰知道如何在我的客戶端使用這個埠？

我的ifconfig命令顯示：

root@vultr:~# ifconfig
ens3: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
       inet 104.238.191.125  netmask 255.255.254.0  broadcast 104.238.191.255
       inet6 fe80::5400:2ff:feec:61e8  prefixlen 64  scopeid 0x20<link>
       ether 56:00:02:ec:61:e8  txqueuelen 1000  (Ethernet)
       RX packets 3383  bytes 984017 (960.9 KiB)
       RX errors 0  dropped 0  overruns 0  frame 0
       TX packets 3470  bytes 897643 (876.6 KiB)
       TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

ens7: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1450
       inet 10.24.96.3  netmask 255.255.0.0  broadcast 10.24.255.255
       inet6 fe80::5800:2ff:feec:61e8  prefixlen 64  scopeid 0x20<link>
       ether 5a:00:02:ec:61:e8  txqueuelen 1000  (Ethernet)
       RX packets 3  bytes 370 (370.0 B)
       RX errors 0  dropped 0  overruns 0  frame 0
       TX packets 225  bytes 9910 (9.6 KiB)
       TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
       inet 127.0.0.1  netmask 255.0.0.0
       inet6 ::1  prefixlen 128  scopeid 0x10<host>
       loop  txqueuelen 1000  (Local Loopback)
       RX packets 0  bytes 0 (0.0 B)
       RX errors 0  dropped 0  overruns 0  frame 0
       TX packets 0  bytes 0 (0.0 B)
       TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

ppp0: flags=4305<UP,POINTOPOINT,RUNNING,NOARP,MULTICAST>  mtu 1396
       inet 10.24.96.3  netmask 255.255.255.255  destination 10.24.96.5
       ppp  txqueuelen 3  (Point-to-Point Protocol)
       RX packets 340  bytes 45323 (44.2 KiB)
       RX errors 0  dropped 0  overruns 0  frame 0
       TX packets 183  bytes 47486 (46.3 KiB)
       TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

iptables -L命令顯示：

root@vultr:~# iptables -L
Chain INPUT (policy ACCEPT)
target     prot opt source               destination
ACCEPT     gre  --  anywhere             anywhere
ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:1723 state NEW

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination
TCPMSS     tcp  --  10.0.0.0/24          anywhere             tcp flags:SYN,RST/SYN TCPMSS clamp to PMTU

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination

在這裡找到解決方案：

iptables (DMZ) 的埠轉發

iptables -A PREROUTING -t nat -i eth1 -p tcp --dport 80 -j DNAT --to 192.168.1.50:80
iptables -A INPUT -p tcp -m state --state NEW --dport 80 -i eth1 -j ACCEPT

引用自：https://serverfault.com/questions/1029412