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使用 squid 检查网页 IP 时出现问题

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使用 squid 检查网页 IP 时出现问题

我的所有网络流量都通过 Squid 使用 iptables 运行：

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination         
ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:http owner UID match proxy 
REDIRECT   tcp  --  anywhere             anywhere            tcp dpt:http redir ports 3128

我还使用 ddclient 来更新动态 DNS 主机：

$ ddclient -force -v
SENDING:  GET / HTTP/1.0
SENDING:   Host: checkip.dyndns.org
SENDING:   User-Agent: ddclient/3.8.0
SENDING:   Connection: close
SENDING:   
RECEIVE:  HTTP/1.0 200 OK
RECEIVE:  Date: Sat, 13 Aug 2011 02:53:11 GMT
RECEIVE:  Content-Type: text/html
RECEIVE:  Server: DynDNS-CheckIP/1.0
RECEIVE:  Cache-Control: no-cache
RECEIVE:  Pragma: no-cache
RECEIVE:  Content-Length: 100
RECEIVE:  X-Cache: MISS from __HOSTNAME__
RECEIVE:  X-Cache-Lookup: MISS from __HOSTNAME__:3128
RECEIVE:  Via: 1.0 __HOSTNAME__ (squid/3.1.14)
RECEIVE:  Connection: close
RECEIVE:  
RECEIVE:  <html><head><title>Current IP Check</title></head><body>Current IP Address: 10.1.1.3</body></html>

ipcheck.dyndns.org 返回的是我电脑的 LAN IP，而不是我的互联网连接的 IP。另一个类似的网站 (ipdetect.dnspark.com) 返回了正确的外部 IP 地址（我已通过重新配置 ddclient 以使用该服务解决了我的问题），但我很好奇 ipcheck.dyndns.org 的情况到底是怎么回事？

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