Security Basics mailing list archives
RE: A Solution for sniffing
From: <Bruce.Orcutt () alltel com>
Date: Wed, 18 Dec 2002 12:45:37 -0500
Actually, I had never heard of Anti-Sniff before. Looks interesting, but looks easily circumvented by a determined techie. Anti-Sniff has three major components: 1) NT based: Easiest way to avoid is not run Windows NT on the Sniffer :) 2) DNS: Easy way to avoid is not to use DNS on the Sniffer, take the logs from the Sniffer and use it to the DNS lookups desired at a later date on a later machine. Can easily set up a simple program to read in a table of IPs, then convert them into DNS names, and re-write the table 3) Timing with a flood: Don't know about your network, but I know I would not want to add the extra traffic of a flood of packets. Also, pretty easy to add a little intelligence into your Sniffer that if it receives X number of packets in Y number of seconds, shut down promiscuous mode temporarily. Also, with faster and faster nics coming out, more and more packets are able to be processed, thus necessitating the increase in the size of the flood, thus causing more problems associated with flooding a network. Just some of my thoughts at least -----Original Message----- From: Merrell, Sam [mailto:SMerrell () avbpgh com] Sent: Wednesday, December 18, 2002 12:18 PM To: Orcutt, Bruce Subject: RE: A Solution for sniffing What about L0pht's Anti-sniff product? Is that still available? -----Original Message----- From: Bruce.Orcutt () alltel com [mailto:Bruce.Orcutt () alltel com] Sent: Tuesday, December 17, 2002 12:19 PM To: fadi () lebrocks com; security-basics () securityfocus com Subject: RE: A Solution for sniffing As sniffing is a passive act, there is no way that you can detect the act itself, unless you have access to the machine that's doing the possible sniffing itself. Perhaps one of the simplest ways to ensure sniffing is made much more difficult at the least is by switching from a hub type network to a switched network. In a switched environment, other users cannot see each others network streams, thus providing a layer of protection. Of course, like all techniques, this can be gotten around by various additional techniques, but it does make life more difficult to would be sniffers. (ie: user installs a hub via an uplink port to switched segment, and connects target's system and a sniffing machine to the hub.) -----Original Message----- From: fadi () lebrocks com [mailto:fadi () lebrocks com] Sent: Tuesday, December 17, 2002 5:41 AM To: security-basics () securityfocus com Subject: A Solution for sniffing Hello Folks, I think i am being sniffed by somone on my network, and i was wondering. is there an application to check wether i am being sniffed or not, and if i was, how can i fix that ?(like PGP for mail, what about other protocols) P.S. : Running Linux Slackware 8.1 (if that would help) cheers, Fadi R. Khouja --- Incoming mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.431 / Virus Database: 242 - Release Date: 12/17/2002 --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.431 / Virus Database: 242 - Release Date: 12/17/2002
Current thread:
- Re: A Solution for sniffing, (continued)
- Re: A Solution for sniffing phani (Dec 18)
- Re: A Solution for sniffing Alberto Cozer (Dec 19)
- Re: A Solution for sniffing Peter Letford (Dec 19)
- Re: A Solution for sniffing Aydin Kocas (Dec 19)
- Re: A Solution for sniffing Joe H. (Dec 20)
- Re: A Solution for sniffing Aydin Kocas (Dec 19)
- RE: A Solution for sniffing Bruce.Orcutt (Dec 18)
- RE: A Solution for sniffing David (Dec 19)
- RE: A Solution for sniffing Jason Kohles (Dec 20)
- RE: A Solution for sniffing David (Dec 19)
- Re: A Solution for sniffing brien mac (Dec 18)
- RE: A Solution for sniffing herakel (Dec 18)
- RE: A Solution for sniffing Bruce.Orcutt (Dec 19)
- Re: A Solution for sniffing Shanon (Dec 20)
- RE: A Solution for sniffing wbjw (Dec 19)
- RE: A Solution for sniffing Jose Avila III (Dec 20)
- RE: A Solution for sniffing Jason Kohles (Dec 20)
- RE: A Solution for sniffing Jose Avila III (Dec 20)
- RE: A Solution for sniffing Anthony, Shayla (Dec 20)
- RE: A Solution for sniffing Chris Berry (Dec 20)
- RE: A Solution for sniffing Konrad Rzeszutek (Dec 20)
- RE: A Solution for sniffing Janssen, Steph (Dec 20)
- Re: A Solution for sniffing David (Dec 23)
- RE: A Solution for sniffing Chris Berry (Dec 20)
(Thread continues...)
- Re: A Solution for sniffing phani (Dec 18)