On May 1, 2013, at 4:40 PM, Thomas Schmid wrote: > Now since a few weeks we get regular complaints about this. So something has > changed.
Yes, things have changed. There are reasons that some of the transit ISPs are performing this blocking. They aren't doing it for kicks. For example, there are non-insignificant numbers of servers/accounts which have been compromised and used to launch large-scale, high-impact DDoS attacks. The negative impact of allowing these servers to emit attack traffic far outweighs the inconvenience experienced by a few end-customers trying to access these servers (which are compromised, anyways, and therefore it isn't a good idea to try and access them in the first place). Suggest you ask the transit ISPs in question directly. You aren't likely to get an authoritative answer on a public email list. ----------------------------------------------------------------------- Roland Dobbins <rdobb...@arbor.net> // <http://www.arbornetworks.com> Luck is the residue of opportunity and design. -- John Milton
