1) If all the machines are up, then you will have less delays due to timeouts. Timeouts make a big difference.
2) since you know the OS, you might reduce your vulnerability set down to windows ones.
3) Doing a fast scan with nmap will help
4) Are all the laptops on shared media? You mention 10mbps, which might be a wireless network (11 = 10+1 overhead) which is shared media. if it's a switched environment, I would say you can do 20-30 at a time no problem. If not, Your gonna be limited to 10 I would wager.
I have a switched 100mbps network here, and i regularly do 30 at a time. i'm pretty sure that I could go higher if I so desired, the bandwidth of an nmap scan isn't as bad as all of that. In effect, if nmap's bandwidth is less than 100% of your line, you can do another without appreciably increasing your time. I can do 30 hosts in half an hour, sometimes less.
On Wednesday, November 13, 2002, at 01:29 PM, Alexandros Papadopoulos wrote:
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I'm going to do a nessus scan of ~100 XP laptops. They will be gathered
together by their owners just for the event, so I need to know the
maximum time this could take.
All machines will be connected to a 10MBps LAN. The machine that's going
to do the scanning is a 1GHz PIII with 512MB RAM and a 10MBps eepro100
card, running Linux kernel 2.4.18.
When testing only one host, with a full portscan, it takes ~20mins. How
would this time increase with the number of hosts that are tested in
parallel?
Scanning needs to be as thorough as possible, so I can't just do a
"fast" scan with Nmap to gain time.
TIA
- -A
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http://andrew.cmu.edu/~apapadop/pub_key.asc
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