Steve, Yes, I've seen Nessus lock up AS400s and Unix boxes. What I find most effective (if incredibly tedious) is to turn all of the scans off, then turn them on group by group (and eventually individually) until you trigger the problem in order to track down what is causing the problem. Obviously, I would recommend working with the sysadmin to coordinate any impacts and lessen problems in production. Good luck! Brennan -----Original Message----- From: steve.x.jonesat_private [mailto:steve.x.jonesat_private] Sent: Thursday, June 12, 2003 4:23 AM To: pen-testat_private Subject: Port scan causing system crashes Hello Please can you help? Has any-one else out there had issues with NMAP port scans (or any other port scanner) causing systems to crash? I use Nessus to baseline the security of our systems and have twice had problems caused by the NMAP port scan on clustered unix boxes running our enterprise applications. NOTE - it was the initial port scan that caused the problems, not the subsequent vulnerability assessment. I've done a quick Google search and found confirmation for one of the systems - BUGTRAQ Vulnerability 3358, "IBM HACMP Port Scan Denial of Service Vulnerability", the other was a bespoke app running on some HP UX boxes. Does any-one know of other systems that fall over with a simple port scan? Up til now I've been running port scans happily across our subnets to look for rogue FTP, SMTP, HTTP etc, obviously I'll have to take more care now... Thanks in advance for any help. Steve This email and any attachments are confidential and intended for the addressee only. If you are not the named recipient, you must not use, disclose, reproduce, copy or distribute the contents of this communication. If you have received this in error, please contact the sender and then delete this email from your system. ------------------------------------------------------------------------ --- ------------------------------------------------------------------------ ---- --------------------------------------------------------------------------- ----------------------------------------------------------------------------
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