Penetration Testing mailing list archives
Re: Small hardware network sniffer - quick solution?
From: Petr.Kazil () eap nl
Date: Wed, 29 Nov 2006 14:51:59 +0100
I've improvised a solution that's both small, cheap and easy to implement. At home I had a spare Speedtouch 546 ADSL modem, which I bought for 70 euro or so. Using telnet I accessed the command line interface and set it up like this: 1) Disable in-built DHCP server 2) Enable DHCP relaying and point it to our DHCP server 3) Enable port mirroring from port 1 to port 4 Now I'm running the modem as an Ethernet switch: LAN is on port 1 MY PC is on port 3 SNIFFER is on port 4 It seems to work fine, all office-applications work (IE, Lotus Notes) and I can even run portscans through it. Maybe it's blocking some traffic, but I haven't seen any obvious drops yet. I'm no expert at this, so: 1) Anyone has any experience with abusing modems as programmable hubs? 2) Could I avoid pointing it to a specific DHCP server, so that it would become purely "plug&play"? 3) Could it be that the set-up is not as transparent as I think it is? The manual for the command line can be found here: http://www.speedtouch.nl/docs/CLIguide_5x6_527.pdf Not all ADSL modems have this functionality. My Netgear modem doesn't seem to have a command line interface. Greetings, Petr ------------------------------------------------------------------------ This List Sponsored by: Cenzic Need to secure your web apps? Cenzic Hailstorm finds vulnerabilities fast. Click the link to buy it, try it or download Hailstorm for FREE. http://www.cenzic.com/products_services/download_hailstorm.php?camp=701600000008bOW ------------------------------------------------------------------------
Current thread:
- Re: Small hardware network sniffer - quick solution? Petr . Kazil (Dec 01)