I have a machine that I cannot connect to the internet, so I update it using the plugin download. My issue is that even after I update and restart nessus everytime I scan I get a High "Plugin feed has not been updated since 2010/8/23" on each machine scanned. Shouldn't the update be updating plugin_feed_info.inc? I do not have this issue on my machine that is connected to the internet for updates. These two machines are pretty identical other than their connection. Has anyone else seen this before?
How do you update the plugins once you have a tar archive? You can try to run nessusd -Q (or nessusd -R which is more drastic but slower) once you have updated the plugins, prior to restarting nessusd.