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Network Security Nessus-Users
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Re: How long should Nessus take to do a full scan?

Subject: Re: How long should Nessus take to do a full scan?
Date: Tue, 29 Mar 2005 09:48:15 +1200
Renaud Deraison wrote:

If you disable safe checks, then don't expect any good performance from
nessusd. Some DoS are pretty nasty and take a very long time to
complete.

For a day-to-day scan, you should really enable them.


This is a month-to-month scan - so I want 'em disabled ;-)

Problem fixed: It ended up being a broken app on the Linux box. Well not broken - port 81 was actually an xinetd controlled redirect to a remote Web server on a 256K link (i.e. a reverse proxy) - sort of S.L.O.W.E.D down the HTTP tests "a wee bit" :-)

Turned off that app, and the test time dropped from 2000+ secs to 460 secs

Thanks. That was hard to figure out. In fact, I really just stumbled across the fault by going through the report line by line and testing each found problem until "I noticed" (very quantitative ;-) that port 81 really seemed slower that it should be. Amazing what an extra 100ms/packet can do to times.

--
Cheers

Jason Haar
Information Security Manager, Trimble Navigation Ltd.
Phone: +64 3 9635 377 Fax: +64 3 9635 417
PGP Fingerprint: 7A2E 0407 C9A6 CAF6 2B9F 8422 C063 5EBB FE1D 66D1

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