iptables异常规则/ Abnormal iptables Rules

此问题常见于Oracle和Vultr的官方系统及部分Ubuntu/ Debian系统。

1. 当nslookup www.instagram.com成功解析出范围100.64.0.0/10的IP，但是解锁还是无法正常使用时，可通过iptables -nvL 命令检查VPS是否存在较多非用户自行设置的iptables规则。

2. 当发现较多异常iptables规则时，可以执行以下命令修复iptables

systemctl disable ufw --now 2>/dev/null

iptables -F

iptables -X

iptables -t nat -F

iptables -t nat -X

iptables -t mangle -F

iptables -t mangle -X

iptables -P INPUT ACCEPT

iptables -P FORWARD ACCEPT

iptables -P OUTPUT ACCEPT

1. 执行完上述命令后请重启机器

Abnormal iptables Rules Causing Unlock Failure

This issue is commonly seen on Oracle and Vultr official image, as well as some Ubuntu/Debian systems.

1. When running

   nslookup www.instagram.com

   successfully resolves to an IP within the 100.64.0.0/10 range, but the unlocking service still doesn’t work properly, you can check whether there are excessive or user-defined iptables rules using the following command:

   iptables -nvL

2. If you find many abnormal iptables rules, you can run the following commands to reset iptables:

   systemctl disable ufw --now 2>/dev/null  
   iptables -F  
   iptables -X  
   iptables -t nat -F  
   iptables -t nat -X  
   iptables -t mangle -F  
   iptables -t mangle -X  
   iptables -P INPUT ACCEPT  
   iptables -P FORWARD ACCEPT  
   iptables -P OUTPUT ACCEPT  

3. After executing the above commands, please reboot your server.