From owner-freebsd-questions Fri Dec 8 9:40:32 2000 From owner-freebsd-questions@FreeBSD.ORG Fri Dec 8 09:40:30 2000 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from harp.wrdp.com (harp.dublin.wrdp.net [212.147.130.131]) by hub.freebsd.org (Postfix) with ESMTP id F364D37B400 for ; Fri, 8 Dec 2000 09:40:29 -0800 (PST) Received: from JRAFTERY (jraftery.dublin.wrdp.net [172.16.4.52]) by harp.wrdp.com (Postfix) with SMTP id 96D9410AC5; Fri, 8 Dec 2000 17:40:15 +0000 (GMT) Message-ID: <012701c0613d$f0c70cd0$340410ac@JRAFTERY> From: "James Raftery" To: , References: Subject: Re: Disabling reverse DNS Date: Fri, 8 Dec 2000 17:40:22 -0000 Organization: Worldport Communications Inc MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4133.2400 Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Hi John, 'FreeBSD' isn't making the DNS requests. Some application or other is, such as applications that make us of tcp_wrappers. You will need to determine which application is causing the DNS queries and configure it not to. To give an example, tcpdump takes a "-n" option to stop it making reverse lookups for IP addresses it grabs from packets. Regards, james ----- Original Message ----- From: "John Murphy" To: Sent: Friday, December 08, 2000 5:32 PM Subject: Disabling reverse DNS While testing a win95 client program (for a friend) which sends udp packets to IPv4 addresses, I find that my FreeBSD-4.1 gateway always tries to lookup the symbolic names by DNS, or tcpdump shows that it does. How can I disable this, preferably on the single port it uses? To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message