apache-2.2 – 使用Nginx/Varnish/Apache记录客户端IP

我让Nginx在端口443上侦听SSL终结器,并将未加密的流量代理到同一服务器上的Varnish. Varnish 3正在处理此流量,并且流量直接在端口80上传输.所有流量都以未加密的方式传递到群集中其他服务器上的Apache实例. Apache实例使用mod_rpaf将已记录的客户端IP替换为X-Forwarded-For标头的内容.

我的问题是,如果流量来自Nginx,而“正确的”客户端IP被记录在VarnishNCSA日志中,看起来Varnish(可以理解)用下游的127.0.0.1替换Nginx的X-Forwarded-For标头,这是用Apache记录的.是否有一个很好的简单方法来阻止Varnish重写X-Forwarded-For如果已经填充了？

if (req.restarts == 0) {
    if (req.http.x-forwarded-for) {
        set req.http.X-Forwarded-For =
    req.http.X-Forwarded-For + "," + client.ip;
    } else {
        set req.http.X-Forwarded-For = client.ip;
    }
}

函数的默认定义始终附加到您在活动VCL文件中定义的函数,但如果定义的函数始终处理请求,则默认逻辑将永远不会执行.

沿这些行设置vcl_recv：

sub vcl_recv {
    /* Your existing logic goes here */
    /* After that,we'll insert the default logic,with the X-Forwarded-For handling removed */
    /* The return (lookup); at the end ensures that the default append behavior won't have an impact */

    if (req.request != "GET" &&
      req.request != "HEAD" &&
      req.request != "PUT" &&
      req.request != "POST" &&
      req.request != "TRACE" &&
      req.request != "OPTIONS" &&
      req.request != "DELETE") {
        /* Non-RFC2616 or CONNECT which is weird. */
        return (pipe);
    }
    if (req.request != "GET" && req.request != "HEAD") {
        /* We only deal with GET and HEAD by default */
        return (pass);
    }
    if (req.http.Authorization || req.http.Cookie) {
        /* Not cacheable by default */
        return (pass);
    }
    return (lookup);
}

编辑：

由于Varnish也直接处理某些连接,因此更好的方法可能是让它有选择地设置标头.您仍然希望包含完整的vcl_recv,以便默认值不应用自己的标头,但在顶部包含此标题：

if (req.restarts == 0) {
    if (!req.http.x-forwarded-for) {
        set req.http.X-Forwarded-For = client.ip;
    }
}

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