nanog mailing list archives
Re: [nsp] known networks for broadcast ping attacks
From: "Jay R. Ashworth" <jra () scfn thpl lib fl us>
Date: Wed, 30 Jul 1997 15:23:27 -0400
On Wed, Jul 30, 1997 at 07:56:11PM +0100, Alex.Bligh wrote:
Urm, 192.41.177.255 is the MAE-East LAN ?! Are you saying attacks are being mounted from here or people are attacking this LAN (not sure which is more worrying)
What he's saying is that someone is mounting broadcast ping flooding attacks with forged source addresses which make them appear to be coming from MAE-East, among other places. He correctly notes that this _must_ be fixed at the boundary routers. Network operators: _please_ make sure your boundary routers do not allow you to send packets upstream which have source addresses on them which are not on your networks. Filters are your friend. A source address of 127.anything is pretty uncool, too, as are broadcast addresses... although those can be harder to figure out nowadays. Cheers, -- jra -- Jay R. Ashworth jra () baylink com Member of the Technical Staff Unsolicited Commercial Emailers Sued The Suncoast Freenet "People propose, science studies, technology Tampa Bay, Florida conforms." -- Dr. Don Norman +1 813 790 7592
Current thread:
- known networks for broadcast ping attacks Edward Henigin (Jul 30)
- Re: known networks for broadcast ping attacks J.D. Falk (Jul 30)
- Re: [nsp] known networks for broadcast ping attacks Alex.Bligh (Jul 30)
- Message not available
- Re: [nsp] known networks for broadcast ping attacks Jay R. Ashworth (Jul 30)
- Re: [nsp] known networks for broadcast ping attacks Paul Ferguson (Jul 30)
- Re: [nsp] known networks for broadcast ping attacks Netstat Webmaster (Jul 30)
- Message not available
- Re: [nsp] known networks for broadcast ping attacks Jay R. Ashworth (Jul 30)
- Message not available
- Re: [nsp] known networks for broadcast ping attacks Jordyn A. Buchanan (Jul 30)
- Message not available
- Re: [nsp] known networks for broadcast ping attacks Jay R. Ashworth (Jul 30)
- Re: [nsp] known networks for broadcast ping attacks Michael Shields (Jul 30)
- Re: [nsp] known networks for broadcast ping attacks Jon Lewis (Jul 30)
- Re: [nsp] known networks for broadcast ping attacks Joe Rhett (Jul 30)
- Message not available
- Re: [nsp] known networks for broadcast ping attacks Jay R. Ashworth (Jul 30)
- Re: [nsp] known networks for broadcast ping attacks Alex.Bligh (Jul 31)