PPTPD启动后本地还是无法连接上，VPN 807

初学，今天尝试搭VPN报错，

按照网上的解答注册表改了，

iptables也重新配置了

结果怎么也连不上

望大神们指点.

iptables配置:

*filter
:INPUT ACCEPT [19095:972367]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [23241:4701499]
-A INPUT -p gre -j ACCEPT
-A INPUT -i eth0 -p tcp -m tcp --dport 1723 -j ACCEPT
-A INPUT -i eth0 -p tcp -m tcp --dport 47 -j ACCEPT
COMMIT
# Completed on Fri Mar 19 18:35:09 2021
# Generated by iptables-save v1.8.4 on Fri Mar 19 18:35:09 2021
*nat
:PREROUTING ACCEPT [1:28]
:INPUT ACCEPT [1:28]
:POSTROUTING ACCEPT [3:260]
:OUTPUT ACCEPT [3:260]
-A POSTROUTING -s 192.168.36.0/24 -j SNAT --to-source *****
COMMIT
# Completed on Fri Mar 19 18:35:09 2021
# Generated by iptables-save v1.8.4 on Fri Mar 19 18:35:09 2021
*mangle

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ping 服务器是可以的

fidder抓包显示“HTTP/1.1 502 Fiddler - DNS Lookup Failed”

是否是DNS解析的问题？应该怎么解决呢？