Ask Slashdot: Patch Management For Offline Customer Systems?

New submitter Nillerz writes: What, in your experience, is generally the best way to distribute patches in a way so customers can download them, considering that the machines are offline? Are there any software packages (open source preferred) that pretty much allow engineers to upload a patch with a description to a web server, and allow customers with credentials that are registered in LDAP to browse and download them quickly? And if not, how do you distribute patches to air-gapped machines?