Date: Sun, 6 May 2001 15:06:52 -0700 From: "Ted Mittelstaedt" <tedm@toybox.placo.com> To: "Doug Wilson" <want_2_learn_freebsd@hotmail.com>, <freebsd-questions@FreeBSD.ORG> Subject: RE: Need snappy telnet service (revisited) Message-ID: <001001c0d678$dac2e840$1401a8c0@tedm.placo.com> In-Reply-To: <DAV21kUqLpHkatd4gmS00004086@hotmail.com>
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Then your only option if you can't do /etc/hosts or enter them into DNS or the -u 0 trick doesen't work, is to modify telnetd. Despite what it appears, the problem really isn't in the server. The problem is that your server is making a DNS call that's querying those customer's ISP's DNS servers for the reverse address - and those ISP's DNS servers are misconfigured. Instead of returning immediately with a "host unknown" those DNS servers are hanging, which is making your server hang. Our local public library has the same problem - they have their card catalog online, and it can be accessed by Telnet. Every once in a great while their DNS server gets hosed and for some reason stops being able to query for reverse addresses. I've had customers call an complain they couldn't get into the card catalog then when I checked the customers had perfectly resolvable reverse DNS entries. So then I call their sysadmin who restarts named and the problem gets fixed. Ted Mittelstaedt tedm@toybox.placo.com Author of: The FreeBSD Corporate Networker's Guide Book website: http://www.freebsd-corp-net-guide.com >-----Original Message----- >From: owner-freebsd-questions@FreeBSD.ORG >[mailto:owner-freebsd-questions@FreeBSD.ORG]On Behalf Of Doug Wilson >Sent: Sunday, May 06, 2001 2:14 PM >To: freebsd-questions@FreeBSD.ORG >Subject: Re: Need snappy telnet service (revisited) > > >All 3 thousand of our customer's dynamic ips assigned by there >isps which we >have no control of? > >No, I need this as a production machine. > >Listen, I could do this in NT/w2k in my sleep, but I am trying to >subvert my >company's dependence on microsoft. > >host files are fine for single family residences, but not here. > >Any other suggestions? > >Doug. > >----- Original Message ----- >From: "Robert Hough" <rch@acidpit.org> >To: "Doug Wilson" <want_2_learn_freebsd@hotmail.com> >Sent: Sunday, May 06, 2001 2:05 PM >Subject: Re: Need snappy telnet service (revisited) > > >> On Sun, May 06, 2001, Doug Wilson wrote: >> >> > The server is in dns, but the machines that connect to it are not--nor >will >> > they ever be--they are dhcp assigned ips. >> >> You should be able to add them /etc/hosts to resolve that. >> >> -- >> Robert Hough (rch@acidpit.org) >> > >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
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