Hi,

Its seems that NodeJS.org start blocking requests from Java. In the logs, I can see the following:

Unpacking http://nodejs.org/dist/v0.12.7/node-v0.12.7-linux-x64.tar.gz to /home/ubuntu/jenkins/tools/jenkins.plugins.nodejs.tools.NodeJSInstallation/NodeJS on Linux Server (i-ea6b8035)
ERROR: Failed to download http://nodejs.org/dist/v0.12.7/node-v0.12.7-linux-x64.tar.gz from slave; will retry from master
java.io.IOException: remote file operation failed: /home/ubuntu/jenkins/tools/jenkins.plugins.nodejs.tools.NodeJSInstallation/NodeJS at hudson.remoting.Channel@4146cb24:Linux Server (i-ea6b8035): java.io.IOException: Server returned HTTP response code: 403 for URL: http://nodejs.org/dist/v0.12.7/node-v0.12.7-linux-x64.tar.gz
at hudson.FilePath.act(FilePath.java:987)

Using tcpflow, the error is the following one:

tcpflow -C port 80 -i eth0
tcpflow: listening on eth0
GET /dist/v0.12.7/node-v0.12.7-linux-x64.tar.gz HTTP/1.1
User-Agent: Java/1.7.0_80
Host: nodejs.org
Accept: text/html, image/gif, image/jpeg, ; q=.2, */; q=.2
Connection: keep-alive

write error to stdout

HTTP/1.1 403 Forbidden
Date: Mon, 31 Aug 2015 04:49:29 GMT
Content-Type: text/html; charset=UTF-8
Transfer-Encoding: chunked
Connection: keep-alive

<title>Access denied | nodejs.org used CloudFlare to restrict access</title>

<p>The owner of this website (nodejs.org) has banned your access based on your browser's signature (21e61bf2296019aa-ua21).</p>