On Thu, 25 Mar 2004, Bryan Ladd wrote: > >If it has an IP address, then your DNS will have an entry both forward > >and backward. > > I don't quite understand, you are saying I need to put all of my local > computers in my DNS record?!? As I said I'm a bit new to working with this
yes. every ip should have a forward and reverse DNS record. whether it's a public or private address. > mail server. I have no users who are outside of my local network (accepting > 2 with laptops), it seems that my mail server shouldn't care where they are > comming from, as long as it lives in a 192.168.0/24.0/24. > it's not that it cares much (other than the resolution timeout), but it's just GOOD SENSE. it starts with doing no reverse DNS for private blocks, then before you know it, it's a habit, and then you're doing it for public blocks, and then some luser puts a contract out on your life, and then, you're dead. do you really want your tombstone to read, "Here lies bryan..because of a lack of PTR records" --Tony .-._.-._.-._.-._.-._.-._.-._.-._.-._.-._.-._.-._.-._.-._.-._.-._.-._.-._.-. Anthony J. Biacco Network Administrator/Engineer [EMAIL PROTECTED] http://www.asteroid-b612.org "It's not easy bein' green..there's so many colors I'd rather be" .-._.-._.-._.-._.-._.-._.-._.-._.-._.-._.-._.-._.-._.-._.-._.-._.-._.-._.-. > > > -----Original Message----- > From: Chuck Yerkes [mailto:[EMAIL PROTECTED] > Sent: Wednesday, March 24, 2004 9:12 PM > To: Subscribers of Qpopper > Subject: Re: Newbie Question > > > Quoting Bryan Ladd ([EMAIL PROTECTED]): > > Hello, I'm rather new to administering a Mail server, I'm running Exim > 3.35 > > and qpopper v4.04 on Debian Woody 2.4.20 My question is in my syslog, I > > keep getting this canonical error when anyone on my 13 subnets checks > thier > > email with outlook or outlook express. Is there a way I can turn off the > > canonical lookup for something like 192.168.0/24.0/24? Is this even a > > problem other than filling up the syslog? Am I even thinking in the right > > direction? > > > > Mar 22 15:27:43 mydomain in.qpopper[28862]: connect from 192.168.12.124 > > Mar 22 15:27:43 mydomain in.qpopper[28862]: (v4.0.4) Unable to get > canonical > > name of client 192.168.12.124: Unknown host (1) [pop_init.c:1075] > > Mar 22 15:27:48 mydomain in.qpopper[28862]: (v4.0.4) POP login by user > > "jones" at (192.168.12.124) 192.168.12.124 [pop_log.c:244] > > > > Bryan Ladd > > Tapestry Health Systems > > cell: 413.222.0291 > > desk: 413.586.2016 x 108 > > Chant with me: > > If it has an IP address, then your DNS will have an entry both forward > and backward. > > > Ok, no rhymes or anything, but over and over and over, I run into > clients who DON'T do this and they work around it all over the place. > You MUST spend the effort. > Either you'll spend the effort and do it right, or you'll spend the > effort working around it. > > If it has an IP address, then it has forward and reverse DNS. > > Make your DNS admin write it 100 times on the blackboard. > Sing it at her down the hall. > Paint it in whiteboard marker on her windshield. > > And life will be good. > > Otherwise, you choose the dark side of DNS and your life will suck > for all time there. > > > > -- .-._.-._.-._.-._.-._.-._.-._.-._.-._.-._.-._.-._.-._.-._.-._.-._.-._.-._.-. Anthony J. Biacco Network Administrator/Engineer [EMAIL PROTECTED] http://www.asteroid-b612.org "It's not easy bein' green..there's so many colors I'd rather be" .-._.-._.-._.-._.-._.-._.-._.-._.-._.-._.-._.-._.-._.-._.-._.-._.-._.-._.-.
