Accessing older iDRAC virtual consoles on MacOS
I recently inherited some 2012-era Dell servers for development purposes. I wanted to use remote console to reinstall the OS, but ran into two problems:
Problem #1 - “Launch console” downloads an unclickable shortcut
In Chrome, when you click the link to launch a virtual console, Chrome downloads a file (which can’t be double-clicked to launch) named something like:
I found a Chrome extension which turns these downloads links into launchable .jnlp files, like:
Problem #2 - New java doesn’t trust old java
Turns out, if your iDrac version is too old, the .jar for the remote console is signed with MD5, and Java >= 8u131 treats it as unsigned (and so refuses to run it).
I ended up with this error:
Unsigned application requesting unrestricted access to system. The following resource is signed with a weak signature algorithm MD5withRSA and is treated as unsigned.
I found a helpful article re the cause, which presented a quick workaround:
On MacOS El Capitan, edit /Library/Internet\ Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/lib/security/java.security, so run:
sudo vi /Library/Internet\ Plug-Ins/JavaAppletPlugin.plugin\ /Contents/Home/lib/security/java.security +613
jdk.jar.disabledAlgorithms=MD2, MD5, RSA keySize < 1024
#jdk.jar.disabledAlgorithms=MD2, MD5, RSA keySize < 1024
Reload the .jnlp, and it should successfully launch.