Firewall Wizards mailing list archives
Re: Why blocking bogons buys you nothing
From: Mikael Olsson <mikael.olsson () clavister com>
Date: Thu, 06 Nov 2003 19:22:22 +0100
Brian Ford wrote:
Maybe your provider is just doing a very good job of blocking Bogons before they reach you?
Eric Vyncke wrote similarily:
May be the small amounts of bogons can be explained by an upstream ISP filtering them ;-)
If this is the case, they are doing a very .. um.. "random" job of blocking bogons. The /8 distribution in my original posting alone suggests otherwise. You can also peruse the raw data that I helpfully provided a link to. Doing a quick time distribution of this data, I get: Month /8s seen Packets ----- -------- ------- 2002-11 29 3671 2002-12 30 3154 2003-01 42 2227 2003-02 35 6003 2003-03 34 1663 2003-04 31 2063 2003-05 39 515 (note that may is incomplete) Brian Ford wrote:
http://www.ripe.net/ripe/meetings/ripe-45/presentations/ripe45-eof-geoff.pdf
This is good work, but it concerns registries, backbones and BGP exchanges, where bogon tracking and blocking can be much more rewarding. My intended target audience is the average firewall admin. Maybe I was unclear in that respect. I have updated the online copy to reflect this fact. Don't get me wrong; researching bogons is interesting. - Who's doing it? - Why? - If they involve two-way communication: how are they doing it? But in my experience, it's not something that the average firewall admin should be doing, or, indeed, even has anything to gain from. -- Mikael Olsson, Clavister AB Storgatan 12, Box 393, SE-891 28 ÖRNSKÖLDSVIK, Sweden Phone: +46 (0)660 29 92 00 Mobile: +46 (0)70 26 222 05 Fax: +46 (0)660 122 50 WWW: http://www.clavister.com _______________________________________________ firewall-wizards mailing list firewall-wizards () honor icsalabs com http://honor.icsalabs.com/mailman/listinfo/firewall-wizards
Current thread:
- Re: Why blocking bogons buys you nothing Eric Vyncke (Nov 05)
- <Possible follow-ups>
- Re: Why blocking bogons buys you nothing Mikael Olsson (Nov 06)
- re: Why blocking bogons buys you nothing Mike Hoskins (Nov 11)