Le vendredi 02 octobre 2009 à 11:01 -0500, Alex H. Ryu a écrit : > If there is DDoS attack going on from/to specific /32, sometimes they do > that to avoid too much overload for the network. > Cogent should give the answer for what's going on.
Generally, such is kept in-AS (null-routing or routing to some other sink of choice). mh > > Alex > > Zak Thompson wrote: > > We had a problem with cogent about a year ago. Somehow.. cymru was > > announcing a /32 of ours and black holing it for whatever reason. It > > was removed but wasn't happy that cogent was allowing cymru to do this > > sort of action. To this date we do not have a valid reason from cogent > > on why they allowed this to happen. > > > > Cheers, > > Zak Thompson > > > > > > > > -----Original Message----- > > From: ML [mailto:m...@kenweb.org] > > Sent: Friday, October 02, 2009 7:23 AM > > To: nanog@nanog.org > > Subject: Cogent leaking /32s? > > > > I received an alert from Cyclops telling me a probe in AS513 had seen a > > /32 that I announce to Cogent for one of our BGP sessions. > > > > Did anyone else see this? > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > -- michael hallgren, mh2198-ripe
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