Asking methods to monitor used IPs
Dear Sir or Madam I have some customers who I have allocated high band width with wide ranges of IPv4 addresses to. Because of lack of IPv4, I would like to see that how many IPs they are using. It would be grateful if you tell me how can I do this and what soft ware I have to use to monitor the used IPs. I would like to thank you in advance and I am looking forward to hearing from you soon. Regards. Jahangir Asadi Network Manager of Padidar Information Technology (Your LIR Member and the owner of AS198357)
Il giorno lun, 04/11/2013 alle 23.06 +0330, Jahangir Asadi ha scritto:
Dear Sir or Madam
I have some customers who I have allocated high band width with wide ranges of IPv4 addresses to. Because of lack of IPv4, I would like to see that how many IPs they are using. It would be grateful if you tell me how can I do this and what soft ware I have to use to monitor the used IPs.
I would like to thank you in advance and I am looking forward to hearing from you soon.
Hi, what you might want to do is a ping sweep. However it is effective only against hosts that allow ICMP echos. For those customers that block ICMP I think your only option is a port scan, which might not be desirable. For both ways your best choice is nmap [1]. BR, leonardo [1] http://nmap.org/
On 11/5/13 13:07 , Leonardo Arena wrote:
Il giorno lun, 04/11/2013 alle 23.06 +0330, Jahangir Asadi ha scritto:
Dear Sir or Madam
I have some customers who I have allocated high band width with wide ranges of IPv4 addresses to. Because of lack of IPv4, I would like to see that how many IPs they are using. It would be grateful if you tell me how can I do this and what soft ware I have to use to monitor the used IPs.
I would like to thank you in advance and I am looking forward to hearing from you soon.
Hi, what you might want to do is a ping sweep. However it is effective only against hosts that allow ICMP echos. For those customers that block ICMP I think your only option is a port scan, which might not be desirable.
For both ways your best choice is nmap [1].
BR,
leonardo
[1] http://nmap.org/
Those are active scans, and some host legitimately do not respond to any ports, that doesn't mean they are not using legitimately using addresses. Passive traffic monitoring is the only true way to answer the question asked, such as netflow, sflow, or with a passive traffic taps. However, passive or active, there are likely political consequences to such activities. You should really think about what your policies are in regards to what data you are going to collect before doing such a thing, and probably consider the implications for your customer privacy policy. YMMV. -- ================================================ David Farmer Email: farmer@umn.edu Office of Information Technology University of Minnesota 2218 University Ave SE Phone: 1-612-626-0815 Minneapolis, MN 55414-3029 Cell: 1-612-812-9952 ================================================
When I need to clear out some IP space and I want to be sure everything is gone, I normally startup arpwatch in a station in the network in question and look at it's results. This might help you as well. Met vriendelijke groet / Best regards, Jan Hugo Prins Infra and Isilon storage consultant E: jprins@betterbe.com T: +31-53-4800694 M: +31-6-26358951 S: jhaprins W: www.betterbe.com <http:///www.betterbe.com> On 11/04/2013 08:36 PM, Jahangir Asadi wrote:
Dear Sir or Madam
I have some customers who I have allocated high band width with wide ranges of IPv4 addresses to. Because of lack of IPv4, I would like to see that how many IPs they are using. It would be grateful if you tell me how can I do this and what soft ware I have to use to monitor the used IPs.
I would like to thank you in advance and I am looking forward to hearing from you soon.
Regards.
Jahangir Asadi
Network Manager of Padidar Information Technology
(Your LIR Member and the owner of AS198357)
participants (4)
-
David Farmer -
Jahangir Asadi -
Jan Hugo Prins -
Leonardo Arena