Code:
jpyeron@devserver21 ~
$ curl -Lv http://www.hibernate.org/hibernate/downloads
* About to connect() to www.hibernate.org port 80
* Trying 209.132.182.21... * connected
* Connected to www.hibernate.org (209.132.182.21) port 80
> GET /hibernate/downloads HTTP/1.1
User-Agent: curl/7.12.1 (x86_64-redhat-linux-gnu) libcurl/7.12.1 OpenSSL/0.9.7a zlib/1.2.1.2 libidn/0.5.6
Host: www.hibernate.org
Pragma: no-cache
Accept: */*
< HTTP/1.1 301 Moved Permanently
< Date: Fri, 30 Aug 2013 11:18:28 GMT
< Server: Apache
< Location: http://www.hibernate.org/downloads
< Content-Length: 309
< Connection: close
< Content-Type: text/html; charset=iso-8859-1
* Closing connection #0
* Issue another request to this URL: 'http://www.hibernate.org/downloads'
* About to connect() to www.hibernate.org port 80
* Trying 209.132.182.21... * connected
* Connected to www.hibernate.org (209.132.182.21) port 80
> GET /downloads HTTP/1.1
User-Agent: curl/7.12.1 (x86_64-redhat-linux-gnu) libcurl/7.12.1 OpenSSL/0.9.7a zlib/1.2.1.2 libidn/0.5.6
Host: www.hibernate.org
Pragma: no-cache
Accept: */*
< HTTP/1.1 502 Proxy Error
< Date: Fri, 30 Aug 2013 11:18:31 GMT
< Content-Length: 464
< Connection: close
< Content-Type: text/html; charset=iso-8859-1
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>502 Proxy Error</title>
</head><body>
<h1>Proxy Error</h1>
<p>The proxy server received an invalid
response from an upstream server.<br />
The proxy server could not handle the request <em><a href="/downloads">GET /downloads</a></em>.<p>
Reason: <strong>Error reading from remote server</strong></p></p>
<hr>
<address>Apache Server at www.hibernate.org Port 80</address>
</body></html>
* Closing connection #0
jpyeron@devserver21 ~
$ traceroute -n www.hibernate.org
traceroute to hibernate.org (209.132.182.21), 30 hops max, 46 byte packets
<snip>
3 207.88.87.17 189.032 ms 209.780 ms 200.949 ms
4 216.156.0.33 176.456 ms 65.736 ms 150.324 ms
5 207.88.14.161 237.171 ms * 188.912 ms
6 206.111.0.154 491.051 ms 154.570 ms 315.671 ms
7 205.171.12.146 289.542 ms 234.433 ms 132.577 ms
8 63.232.247.146 90.974 ms 174.453 ms 288.046 ms
9 209.132.181.162 248.060 ms !X 209.132.181.166 245.179 ms !X *