Fwd: Class E addresses in the wild
Is anyone else seeing a lot of Class E address space (240.0.0.0/4) at their borders? Has this space been reinstated in some as yet unknown to me RFC? Thanks, Buz -- Buz Dale buzdale@gmail.com GMT -5 -- -- Buz Dale buzdale@gmail.com GMT -5 --
No authorized IETF use that I know of. See http://www.iana.org/assignments/ipv4-address-space/ipv4-address-space.xml Thanks, Donald ============================= Donald E. Eastlake 3rd +1-508-333-2270 (cell) 155 Beaver Street, Milford, MA 01757 USA d3e3e3@gmail.com On Thu, Mar 21, 2013 at 2:09 PM, Buz Dale <buzdale@gmail.com> wrote:
Is anyone else seeing a lot of Class E address space (240.0.0.0/4) at their borders? Has this space been reinstated in some as yet unknown to me RFC? Thanks, Buz
-- Buz Dale buzdale@gmail.com GMT -5 --
-- Buz Dale buzdale@gmail.com GMT -5 --
It is (or was) fairly commonly in use among internal nets which overflowed RFC 1918 or have to internetwork with other heavy users of RFC 1918 space. I know of at least two service providers and one cell network who were using it for that 3 years ago. Someone leaking internal routes for such? Or attempt to hijack the space? Only the Shadow knows... On Thu, Mar 21, 2013 at 11:17 AM, Donald Eastlake <d3e3e3@gmail.com> wrote:
No authorized IETF use that I know of. See http://www.iana.org/assignments/ipv4-address-space/ipv4-address-space.xml
Thanks, Donald ============================= Donald E. Eastlake 3rd +1-508-333-2270 (cell) 155 Beaver Street, Milford, MA 01757 USA d3e3e3@gmail.com
On Thu, Mar 21, 2013 at 2:09 PM, Buz Dale <buzdale@gmail.com> wrote:
Is anyone else seeing a lot of Class E address space (240.0.0.0/4) at their borders? Has this space been reinstated in some as yet unknown to me RFC? Thanks, Buz
-- Buz Dale buzdale@gmail.com GMT -5 --
-- Buz Dale buzdale@gmail.com GMT -5 --
-- -george william herbert george.herbert@gmail.com
On Thu, Mar 21, 2013 at 12:06 PM, George Herbert <george.herbert@gmail.com> wrote:
It is (or was) fairly commonly in use among internal nets which overflowed RFC 1918 or have to internetwork with other heavy users of RFC 1918 space. I know of at least two service providers and one cell network who were using it for that 3 years ago.
I am pretty sure Class E is completely defunct and not used anywhere since Cisco and Juniper routers do not forward the packets (circa 2008 testing) and no known host accept it as a valid address, AFAIK. CB
Someone leaking internal routes for such? Or attempt to hijack the space?
Only the Shadow knows...
On Thu, Mar 21, 2013 at 11:17 AM, Donald Eastlake <d3e3e3@gmail.com> wrote:
No authorized IETF use that I know of. See http://www.iana.org/assignments/ipv4-address-space/ipv4-address-space.xml
Thanks, Donald ============================= Donald E. Eastlake 3rd +1-508-333-2270 (cell) 155 Beaver Street, Milford, MA 01757 USA d3e3e3@gmail.com
On Thu, Mar 21, 2013 at 2:09 PM, Buz Dale <buzdale@gmail.com> wrote:
Is anyone else seeing a lot of Class E address space (240.0.0.0/4) at their borders? Has this space been reinstated in some as yet unknown to me RFC? Thanks, Buz
-- Buz Dale buzdale@gmail.com GMT -5 --
-- Buz Dale buzdale@gmail.com GMT -5 --
-- -george william herbert george.herbert@gmail.com
On Thu, Mar 21, 2013 at 5:10 PM, cb.list6 <cb.list6@gmail.com> wrote:
I am pretty sure Class E is completely defunct and not used anywhere since Cisco and Juniper routers do not forward the packets (circa 2008 testing) and no known host accept it as a valid address, AFAIK.
Both the net and host sides of this are trivially repairable problems, even for crazy cellphone network operators. As long as you have host source code and a network vendor you can demand custom patches from.... -- -george william herbert george.herbert@gmail.com
It's in our Martians ACL but we left it off of a couple of new border connections and saw a good bit of it forwarded to us since Wednesday from multiple ISPs. Fixed now but still curious. Thanks, Buz On Thu, Mar 21, 2013 at 9:19 PM, George Herbert <george.herbert@gmail.com>wrote:
On Thu, Mar 21, 2013 at 5:10 PM, cb.list6 <cb.list6@gmail.com> wrote:
I am pretty sure Class E is completely defunct and not used anywhere since Cisco and Juniper routers do not forward the packets (circa 2008 testing) and no known host accept it as a valid address, AFAIK.
Both the net and host sides of this are trivially repairable problems, even for crazy cellphone network operators. As long as you have host source code and a network vendor you can demand custom patches from....
-- -george william herbert george.herbert@gmail.com
-- Buz Dale buzdale@gmail.com GMT -5 --
Fiserv uses this address space for their ATM network. On Fri, Mar 22, 2013 at 9:39 AM, Buz Dale <buzdale@gmail.com> wrote:
It's in our Martians ACL but we left it off of a couple of new border connections and saw a good bit of it forwarded to us since Wednesday from multiple ISPs. Fixed now but still curious. Thanks, Buz
On Thu, Mar 21, 2013 at 9:19 PM, George Herbert <george.herbert@gmail.com
wrote:
On Thu, Mar 21, 2013 at 5:10 PM, cb.list6 <cb.list6@gmail.com> wrote:
I am pretty sure Class E is completely defunct and not used anywhere since Cisco and Juniper routers do not forward the packets (circa 2008 testing) and no known host accept it as a valid address, AFAIK.
Both the net and host sides of this are trivially repairable problems, even for crazy cellphone network operators. As long as you have host source code and a network vendor you can demand custom patches from....
-- -george william herbert george.herbert@gmail.com
-- Buz Dale buzdale@gmail.com GMT -5 --
participants (6)
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Buz Dale -
cb.list6 -
Donald Eastlake -
Dustin Schuemann -
George Herbert -
joel jaeggli