Friday, August 30, 2019

Did just Verizon injected a bogus prefix?

Checking my logs I saw this:

003456: Aug 30 09:04:00.153: %BGP-6-MSGDUMP_LIMIT: unsupported or mal-formatted message received from *.*.*.*

FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF 0121 0200 0001 0340 0101 0240 02DE 0237

0000 **** 0000 **** 0000 **** 0000 **** 0000 **** 0000 **** 0000 577A 0000 577A

0000 577A 0000 577A 0000 577A 0000 577A 0000 577A 0000 577A 0000 577A 0000 577A

0000 577A 0000 577A 0000 577A 0000 577A 0000 577A 0000 577A 0000 577A 0000 577A

0000 577A 0000 577A 0000 577A 0000 577A 0000 577A 0000 577A 0000 577A 0000 577A

0000 577A 0000 577A 0000 577A 0000 577A 0000 577A 0000 577A 0000 577A 0000 577A

0000 577A 0000 577A 0000 577A 0000 577A 0000 577A 0000**MSG 00003 TRUNCATED**

**MSG 00003 CONTINUATION #01** 577A 0000 577A 0000 577A

003457: Aug 30 09:04:00.273: %BGP-6-ASPATH: Long AS path **** **** **** **** **** **** 22394 22394 22394 22394 22394 22394 22394 22394 22394 22394 22394 22394 22394 22394 22394 22394 22394 22394 22394 22394 22394 22394 22394 22394 22394 22394 22394 22394 22394 22394 22394 22394 22394 received from *.*.*.*: BGP(0) Prefixes: 72.105.136.0/21 174.215.0.0/16

More info:

https://imgur.com/a/yoFes7v

https://www.iana.org/assignments/bgp-parameters/bgp-parameters.xhtml



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