Re: Port scan causing system crashes

On Thu, Jun 12, 2003, steve.x.jones@royalmail.com wrote:

>
>
> Hello

ISS NFS scans totally fsck up our HP-UX NFS. We believe the problem lies in client biod's and cacheing. After a scan, NFS writes fail while NFS reads work fine. To fix the problem, on each client we remount using a hardmount, write a large file over NFS, then remount using a softmount. This seems to clear it up. Remounting using NFSv1 as opposed to NFSv3 also fixes the issue, which makes me believe that asynchronous writes and cacheing are at the heart of the problem.

We also confirmed that port scanning our Nortel switches lock them hard, too.