nanog mailing list archives
Re: [NANOG] fair warning: less than 1000 days left to IPv4 exhaustion
From: Justin Shore <justin () justinshore com>
Date: Fri, 09 May 2008 11:05:20 -0500
Suresh Ramasubramanian wrote:
Let's think smaller. /16 shall we say? Like the /16 here. Originally the SRI / ARPANET SF Bay Packet Radio network that started back in 1977. Now controlled by a shell company belonging to a shell company belonging to a "high volume email deployer" :) http://blog.washingtonpost.com/securityfix/2008/04/a_case_of_network_identity_the_1.html
Which leads me to ask an OT but slightly related question. How do other SPs handle the blacklisting of ASNs (not prefixes but entire ASNs). The /16 that Suresh mentioned here is being originated by a well-known spam factory. All prefixes originating from that AS could safely be assumed to be undesirable IMHO and can be dropped. A little Googling for that /16 brings up a lot of good info including: http://groups.google.com/group/news.admin.net-abuse.email/msg/5d3e3f89bb148a4c Does anyone have any good tricks for filtering on AS path that they'd like to share? I already have my RTBH set up so setting the next-hop for all routes originating from a given ASN to one of my blackhole routes (to null0, a sinkhole or srubber) would be ideal. Not accepting the route period and letting uRPF drop traffic would be ok too. Justin _______________________________________________ NANOG mailing list NANOG () nanog org http://mailman.nanog.org/mailman/listinfo/nanog
Current thread:
- Re: [NANOG] fair warning: less than 1000 days left to IPv4 exhaustion, (continued)
- Re: [NANOG] fair warning: less than 1000 days left to IPv4 exhaustion William Warren (May 03)
- Re: [NANOG] fair warning: less than 1000 days left to IPv4 exhaustion Nathan Ward (May 03)
- Re: [NANOG] fair warning: less than 1000 days left to IPv4 Paul Vixie (May 04)
- Re: [NANOG] fair warning: less than 1000 days left to IPv4 Tomas L. Byrnes (May 04)
- Re: [NANOG] fair warning: less than 1000 days left to IPv4 Paul Vixie (May 04)
- Re: [NANOG] fair warning: less than 1000 days left to IPv4 Joel Jaeggli (May 04)
- Re: [NANOG] fair warning: less than 1000 days left to IPv4 David Conrad (May 04)
- Re: [NANOG] fair warning: less than 1000 days left to IPv4 Randy Bush (May 04)
- Re: [NANOG] fair warning: less than 1000 days left to IPv4 exhaustion Joel Jaeggli (May 03)
- Re: [NANOG] fair warning: less than 1000 days left to IPv4 exhaustion Suresh Ramasubramanian (May 03)
- Re: [NANOG] fair warning: less than 1000 days left to IPv4 exhaustion Justin Shore (May 09)
- Re: [NANOG] fair warning: less than 1000 days left to IPv4 exhaustion David Conrad (May 04)
- Re: [NANOG] fair warning: less than 1000 days left to IPv4 exhaustion Patrick W. Gilmore (May 04)
- Re: [NANOG] fair warning: less than 1000 days left to IPv4 exhaustion Iljitsch van Beijnum (May 05)