AS23456 is currently announcing a good few netblocks (which don't have a
very good smtp reputation, by the way).
Funny thing is, that's a special use ASN as per rfc4893, something about
two octet ASNs that don't have a four octet representation.
Only one upstream (airtelbroadband-as-ap, as24560)
At least the 103.x which are announced by airtel. The other netblocks (one
Indian and two brazilian) appear unrelated though also showing as23456
--srs (htc one x)
On 03-Feb-2013 6:12 PM, Suresh Ramasubramanian
ops.li...@gmail.comjavascript:_e({}, 'cvml',
'ops.li...@gmail.com');
wrote:
AS23456
On Sun, Feb 03, 2013 at 06:12:32PM +0530, Suresh Ramasubramanian wrote:
AS23456 is currently announcing a good few netblocks (which don't have a
very good smtp reputation, by the way).
To say the least. A quick rDNS scan reveals that those netblocks include:
8448 addresses
On 2/3/13 9:04 AM, Rich Kulawiec r...@gsp.org wrote:
On Sun, Feb 03, 2013 at 06:12:32PM +0530, Suresh Ramasubramanian wrote:
AS23456 is currently announcing a good few netblocks (which don't have a
very good smtp reputation, by the way).
To say the least. A quick rDNS scan reveals that those
I do believe, as has been pointed out to me elsewhere that this is what
shows up when there's a 64 bit ASN and router software that doesn't grok 64
bit ASNs
So, completely by chance that one such as belongs to what looks like a bulk
mailer
--srs (htc one x)
On 03-Feb-2013 9:02 PM, Dave Pooser
I strongly recommend that you read about and fully understand how 4-byte
ASNs work, and their use of AS23456 before you continue this thread.
On Sun, 3 Feb 2013, Suresh Ramasubramanian wrote:
I do believe, as has been pointed out to me elsewhere that this is what
shows up when there's a 64
Some links:
http://www.nanog.org/meetings/nanog45/presentations/Tuesday/Hankins_4byteASN_N45.pdf
https://tools.ietf.org/html/rfc6793
On Sun, Feb 3, 2013 at 11:15 AM, Brandon Ross br...@pobox.com wrote:
I strongly recommend that you read about and fully understand how 4-byte
ASNs work, and
AS23456 is what you get if your system doesn't properly support 32-bit ASNs
and an AS-PATH (or peer) uses a 32-bit ASN.
There should be an extended attribute on the route that contains the full
32-bit AS-PATH called AS4_PATH associated with any such routes.
Arguably any route containing AS23456
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