Hello, We did also receive that message for nameservers in: - 3 networks - 4 class c-subnets - 4 nameservers (on different servers) All nameservers where not resolved if I read it correctly. I did check it a few seconds ago for another time on all nameservers with dig: rDNS records are correctly returned. With kind regards, Mark Scholten Stream Service -----Original Message----- From: dns-wg-admin@ripe.net [mailto:dns-wg-admin@ripe.net] On Behalf Of Gilles Massen Sent: maandag 9 maart 2009 13:45 To: dns-wg@ripe.net Subject: [dns-wg] DNS lameness notifications Dear colleagues, I was wondering if there is a detailed description of what and how is tested in order to check the lameness of a server (i.e. how are the names resolved, timeouts and retransmits of the queries, checks made,....)? Any pointer would be welcome. The background is that I got notifications ("Unable to resolve nameserver ") which are most probably wrong, unless the resolving algorithm is very delicate... Best regards, Gilles -- Fondation RESTENA - DNS-LU 6, rue Coudenhove-Kalergi L-1359 Luxembourg tel: (+352) 424409 fax: (+352) 422473