| To: | pen-test@securityfocus.com |
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| Subject: | Re: Banner Grabbing |
| From: | "Jamie Riden" <jamie.riden@gmail.com> |
| Date: | Fri, 22 Dec 2006 17:16:34 +1300 |
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On 22/12/06, Michael J Condon <mjc001@jjuno.com> wrote: What steps can be used to prevent "OS Banner Grabbing" by the client? Also, what is the best method or "attack" to get to a banner on MS and non MS Operating Systems? [resend, bounced due to nonsubscribed address] Banner grabbing: 'telnet victim.example.com <port>' will often get you a banner. My favourite is 'nmap -sV victim.example.com' which will do all the work for you. To prevent banner grabbing, you can alter or hide banners for various services, but since many exploits are automated and a lot of people launch attacks blindly, I don't see this as a must-do item. There are other ways of identifying services other than reading the welcome banner, and it won't help you if your service is actually vulnerable. cheers, Jamie -- Jamie Riden, CISSP / jamesr@europe.com / jamie.riden@gmail.com NZ Honeynet project - http://www.nz-honeynet.org/ |
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