Loopback configuration

Mon Jun 24 19:16:59 UTC 2013

It doesn't change the statement if the mailserver is requiring its forward and reverses to match.  Our DNS at work provides reverses for portions of 10/18, 172.16/12 and 192.168/16 for various reasons, including that our backup system requires forwards and reverses to match.

----- Original Message -----
> 
> 
> 192.168.0.101 is in the non-routeable address block
> 
> 
> https://en.wikipedia.org/wiki/Private_network
> 
> 
> 
> 
> On Sat, Jun 22, 2013 at 2:00 PM, Lawrence K. Chen, P.Eng. <
> lkchen at ksu.edu > wrote:
> 
> 
> None of what you've described seems to have anything to do with
> bind....
> 
> But, if you are running bind... there are a number of ways that you
> could have bind return the internal IP to internal users, and return
> the external IP to everybody else. Can even do this if your internal
> DNS server is not connected to the external DNS servers in any way (
> 
> Hard to say why your mail server was killed by the host file
> override....perhaps its using the external names to know what its
> external IP is, and it suddenly ceased to be an external. Or perhaps
> it requires forward and reverse lookups to be correct, and you don't
> have your DNS configured to return the correct fqdn for
> 192.168.0.101. Probably not, because there's no reverse for
> 184.70.190.126....hmmm, maybe it doesn't like that there's no longer
> an MX record for any of the domains now...where MX points to a
> different IP (184.70.190.122).
> 
> 
> 
> ----- Original Message -----
> > 
> > Hello,
> > 
> > 
> > I have a new router that is apparently making it impossible for me
> > to
> > view my personal sites from behind the router by domain name, a
> > function that is necessary. I can see the sites by local
> > 192.168....
> > ip address and port number and others have confirmed they are
> > available on the www, so the server is running and named is
> > resolving properly outside the LAN.
> > 
> > 
> > This is the hosts.conf, where I think my error might lie:
> > 
> > 
> > 
> > 
> > 
> > ##
> > # Host Database
> > #
> > # localhost is used to configure the loopback interface
> > # when the system is booting. Do not change this entry.
> > ##
> > 127.0.0.1 localhost web2
> > 255.255.255.255 broadcasthost
> > ::1 localhost
> > fe80::1%lo0 localhost
> > 184.70.190.122 mail.normanfournier.com mail web1-ext
> > 184.70.190.126 web2.normanfournier.com www web2-ext
> > 192.168.0.1 nf-telus-gw-int
> > 192.168.0.100 norman-desktop
> > 192.168.0.101 ns2
> > 184.70.190.122 ns1
> > 
> > 
> > 
> > 
> > 
> > I *added* these lines to the bottom of hosts.conf
> > 
> > 
> > 
> > 
> > 
> > 192.168.0.101 creativeprocess.biz
> > 192.168.0.101 thecocoapod.com
> > 192.168.0.101 rogueagent.ca
> > 192.168.0.101 e4edmonton.com
> > 192.168.0.101 brandasset.net
> > 192.168.0.101 greaterthanhtml.com
> > 192.168.0.101 kawacatoose.com
> > 
> > 
> > I rebooted and something killed my mailserver when I did this, and
> > I
> > still could now view the sites by domain name behind the router, so
> > I reverted to the old file. Is here another place I should add the
> > domain names, is there an error in my syntax (this has worked
> > perfectly before) or it this the entirely wrong place to be looking
> > to solve this problem?
> > 
> > 
> > Thank you.
> > 
> > 
> > Norman
> > _______________________________________________
> > Please visit https://lists.isc.org/mailman/listinfo/bind-users to
> > unsubscribe from this list
> > 
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> > https://lists.isc.org/mailman/listinfo/bind-users
> 
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> 
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-- 
Who: Lawrence K. Chen, P.Eng. - W0LKC - Senior Unix Systems Administrator
For: Enterprise Server Technologies (EST) -- & SafeZone Ally
Snail: Computing and Telecommunications Services (CTS)
Kansas State University, 109 East Stadium, Manhattan, KS 66506-3102
Phone: (785) 532-4916 - Fax: (785) 532-3515 - Email: lkchen at ksu.edu
Web: http://www-personal.ksu.edu/~lkchen - Where: 11 Hale Library