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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: identify hostname
That won't work for them because you are using the same data to build filters. In fact, you can do it in a script, automate the whole thing.. At 06:29 PM 12/3/98 -0500, Jonathan Mischo wrote: >this makes sense...until someone gets lazy, and takes a week to filter, >and the smurf brats catch on, and start querying DNS to find amplifiers. > >-Taz > >-- >Jonathan "Taz" Mischo -- Network Slave -- [email protected] >Mindspring Enterprises, Inc. 1430 W. Peachtree St. Suite 400 >Atlanta, GA 30309 1.800.719.4664 x2705 404.287.0770 x2705 >fax: 404.287.0885 pager: [email protected] M-F2-10pET > >On Thu, 3 Dec 1998, Roeland M.J. Meyer wrote: > >> At 11:32 AM 12/2/98 -0700, Pete Kruckenberg wrote: >> >> I do have an access list deny for incoming destinations to *.*.*.255 >> >> since I do know that the only customer we have with larger than a /24 >> >> from us (via cw.net) also happens to have nothing larger than /26 in >> >> their network. AFAIK, today, smurfers are only using *.*.*.255. They >> >> would have to track a lot more information to use others, so for now I >> >> can generally expect that deny to prevent us from being an amplifier. >> > >> >It's not difficult to find subnet broadcast addresses, since few routers >> >(if they even support it) are configured to filter ICMP replies. If there >> >isn't already software out there, it will take all of a few hours to add >> >broadcast-finding code to the smurfing software in existence. >> >> Guys, >> >> Why not make your down-stream fill out a *complete* IN-ADDR.ARPA file which >> lists their sub-net bcast and base addresses? That way yo could use the DNS >> system itself to find those addresses. >> ___________________________________________________ >> Roeland M.J. Meyer, ISOC (InterNIC RM993) >> e-mail: <mailto:[email protected]>[email protected] >> Internet phone: hawk.mhsc.com >> Personal web pages: staff<http://www.mhsc.com/~rmeyer>.mhsc.com/~rmeyer >> Company web-site: <http://www.mhsc.com/>www.mhsc.com >> ___________________________________________________ >> Who is John Galt? >> "Atlas Shrugged" - Ayn Rand >> > ___________________________________________________ Roeland M.J. Meyer, ISOC (InterNIC RM993) e-mail: <mailto:[email protected]>[email protected] Internet phone: hawk.mhsc.com Personal web pages: staff<http://www.mhsc.com/~rmeyer>.mhsc.com/~rmeyer Company web-site: <http://www.mhsc.com/>www.mhsc.com ___________________________________________________ Who is John Galt? "Atlas Shrugged" - Ayn Rand
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