From NANOG: If you're connected to AS3549, and you do *not* have inbound BGP filters (you really, really should), this might bite you or your customers.
Cheers, -- jra ----- Forwarded Message -----
From: "Yang Yu" <yang.yu.list@gmail.com> To: "NANOG list" <nanog@nanog.org> Sent: Sunday, July 21, 2013 12:26:20 AM Subject: AS3549 Level3/GBLX carrying routing for 10.0.0.0/8 It appears AS3549 is announcing 10.0.0.0/8. I noticed it from an AS3549 customer.
From GBLX looking glass, ATL1
traceroute Protocol [ip]: ip Target IP address: 10.0.0.1 Source address: Numeric display [n]: n Timeout in seconds [3]: 1 Probe count [3]: 2 Minimum Time to Live [1]: 1 Maximum Time to Live [30]: 30 Port Number [33434]: Loose, Strict, Record, Timestamp, Verbose[none]: Type escape sequence to abort. Tracing the route to 10.0.0.1 VRF info: (vrf in name/id, vrf out name/id) 1 te3-1-10G.par9.CTA1.GRU.gblx.net (67.16.142.26) 120 msec 124 msec 2 122.5.125.189.static.impsat.net.br (189.125.5.122) 120 msec 120 msec 3 10.0.0.1 [AS 262487] 124 msec 120 msec
Apparently the customer didn't have proper inbound filter...... Reply from 10.0.0.1: bytes=32 time=132ms TTL=61
-- Jay R. Ashworth Baylink jra@baylink.com Designer The Things I Think RFC 2100 Ashworth & Associates http://baylink.pitas.com 2000 Land Rover DII St Petersburg FL USA #natog +1 727 647 1274