This is unfortunately a necessary measure. See the "Fix" section in https://wiki.jenkins-ci.org/display/SECURITY/Jenkins+Security+Advisory+2013-01-04
2013/1/7 Jon Schewe <jpsch...@mtu.net> > I just upgraded to 1.480.2 from 1.471 and my JNLP slaves can no longer > connect. I get an error: > > JNLPException[category: Download Error : Exception: java.io.IOException: > Server returned HTTP response code: 403 for URL: > https://server:8010/computer/slave-jnlp/slave-agent.jnlp : LaunchDesc: > null ] > at com.sun.javaws.Main.launchApp(Unknown Source) > at com.sun.javaws.Main.continueInSecureThread(Unknown Source) > at com.sun.javaws.Main$1.run(Unknown Source) > at java.lang.Thread.run(Unknown Source) > > I have security turned on, although anonymous has overall read. What other > permissions do I need to change? What are my options? > > -- > http://mtu.net/~jpschewe > > -- Kohsuke Kawaguchi