From owner-freebsd-questions Tue Jun 19 9:58: 9 2001 Delivered-To: freebsd-questions@freebsd.org Received: from btconnex.net (mailtest.btconnex.net [209.47.192.8]) by hub.freebsd.org (Postfix) with SMTP id 5F8D737B401 for ; Tue, 19 Jun 2001 09:58:06 -0700 (PDT) (envelope-from dan@beanfield.com) Received: (qmail 91791 invoked from network); 19 Jun 2001 16:54:55 -0000 Received: from unknown (HELO beanfield.com) (192.168.66.18) by mailtest.btconnex.net with SMTP; 19 Jun 2001 16:54:55 -0000 Message-ID: <3B2F84CE.608E7F75@beanfield.com> Date: Tue, 19 Jun 2001 12:58:54 -0400 From: Dan Armstrong X-Mailer: Mozilla 4.76 [en] (X11; U; SunOS 5.8 sun4m) X-Accept-Language: en MIME-Version: 1.0 To: Tony Wells Cc: freebsd-questions@freebsd.org Subject: Re: Urgent help with Reverse Lookups and FTPD References: <3B2F74D7.C057B32F@beanfield.com> <3B2F820B.4147E4E8@camel.kdsi.net> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Well, we have almost 1000 stub-bridged Ethernet LANs each on it's own private subnet tunneled over an ATM network back to a router. The long and the short of it is that we just cannot possibly manage reverse info for the entire network. Dan. Tony Wells wrote: > Do you really need thousands of addresses for your customers? I'm > making an assumption , but if you're assigning addresses using DHCP, can > you limit the range of addresses assigned to a reasonable amount? If > you only have say, 100 modems/xdsl/isdn or whatever connections, you > don't need ~64,000 IP's available. > > I would try looking into limiting the addresses assigned, and then using > /etc/hosts or reverse dns to resolve the IP's. (Unless of course, you > really need all those IP's.) > > Dan Armstrong wrote: > > > > We are a small ISP, and just turned up a new webserver running Free4.3 > > > > Most of our customers live on private (192.168) addresses and I am > > getting slaughtered with phone calls that they cannot ftp into their > > sites, and it is because their ftp programs don't necessarily wait for > > Free's ftpd to timeout doing the reverse lookup, for an address that of > > course does not have any reverse information for it. If I add their > > IP to the /etc/hosts BOOM they get in instantly. These thousands of > > addresses are all dynamically assigned, so the hosts file fix is not > > possible on this scale. Is there a way I can get it to stop? HELP! > > > > Dan. > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > > with "unsubscribe freebsd-questions" in the body of the message To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message