Security Basics mailing list archives
NMAP Scan of My Company's Internal Network: 666,880 IP addresses in 49 hours
From: "Mogren, Jack L." <mogren () mayo edu>
Date: Fri, 5 Nov 2004 11:35:26 -0600
I just wanted to let the list know my NMAP scanning results for my company's large privately owned internal network. I scanned 10 class B ranges and several class Cs in our internal network. As part of a plan to perform internal network inventories or my company's network, I scanned 666,880 IP addresses and found 66,558 active addresses. The scan took 49 hours and was performed from a Compaq DL380 running Redhat Linux 8.0. This is the NMAP options I used: nmap -O -T5 -PE --osscan_limit -F -v --max_rtt_timeout 100 --max_parallelism 100 --min_hostgroup 96 -oX /home/security/all_ip.xml -iL /home/security/ip_addresses.txt I also customized nmap-services file to only include 270 services. We plan to perform this scan on a weekly basis. Thanks to all who gave me ideas. Jack Mogren Mayo Clinic Foundation Information Security Office
Current thread:
- NMAP Scan of My Company's Internal Network: 666,880 IP addresses in 49 hours Mogren, Jack L. (Nov 05)
- Re: NMAP Scan of My Company's Internal Network: 666, 880 IP addresses in 49 hours Hasnain Atique (Nov 05)
- Re: NMAP Scan of My Company's Internal Network: 666, 880 IP addresses in 49 hours Steffen Furholm / CABO Communications A/S (Nov 08)
- Re: NMAP Scan of My Company's Internal Network: 666,880 IP addresses in 49 hours cgkanchi (Nov 08)
- RE: NMAP Scan of My Company's Internal Network: 666,880 IP addresses in 49 hours Shaineel Singh (Nov 09)
- Re: NMAP Scan of My Company's Internal Network: 666, 880 IP addresses in 49 hours Hasnain Atique (Nov 05)