From owner-freebsd-security Tue Oct 9 14:17:31 2001 Delivered-To: freebsd-security@freebsd.org Received: from webs1.accretive-networks.net (webs1.accretive-networks.net [207.246.154.13]) by hub.freebsd.org (Postfix) with ESMTP id 8FBD737B403 for ; Tue, 9 Oct 2001 14:17:27 -0700 (PDT) Received: from localhost (davidk@localhost) by webs1.accretive-networks.net (8.11.1/8.11.3) with ESMTP id f99KDlL78909 for ; Tue, 9 Oct 2001 13:13:48 -0700 (PDT) Date: Tue, 9 Oct 2001 13:13:47 -0700 (PDT) From: David Kirchner X-X-Sender: To: Subject: heads up? ssh, krb5-realm.{com,net} Message-ID: <20011009130922.C85958-100000@localhost> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-security@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org This problem just started showing up for us today. Apparently, the openssh that comes with 4.2-R has some strange bug in that it looks up krb5-realm in DNS even though no Kerberos server was ever configured in any file on the system. (Dangerous to have this default, no?) The provider that hosts krb5-realm.com and .net apparently decided to either shut off their name servers or delay name server responses for these domains - not too surprising since this probably created a fair amount of traffic. I suspect we'll be seeing a number of e-mails from people having trouble ssh'ing in to their machines and having it take >2 minutes. The quick-fix for us was to add krb5-realm.com and .net to our DNS tables so the lookup would be quick. The problem appears to be fixed in 4.4, but I haven't checked out how yet (hopefully, all Kerberos checking is completely disabled unless someone specifically enables it?) To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message