DNS newbie requires pointers to good tutorials!

[Andrew Crook]

i  tried to email you, but message bounced, could you please email me

many thanks

Andrew

"Herb Martin" <news at LearnQuick.com> wrote in message
news:bhts7k$3pr$1 at sf1.isc.org...
>
> "Andrew Crook" <andrew at NOSPAM_andicrook.demon.co.uk> wrote in message
> news:bhr2rb$fm0$1 at sf1.isc.org...
> > Thanks
> >
> > I have since looked at some example configuration files, it doesn't
really
> > look that bad.
> > I will search out the recommended book. there are one or two things I
need
> > to lookup.e.g.
>
> Then you are better than I am already as I still look something up
> almost every day <grin>
>
> > what if your own network number e.g. 192.168.42 used later for reverse
> > lookup 42.168.192.in-addr.arpa (from
> > http://www.ripe.net/ripe/docs/ripe-192.html example files) is less than
> 255
> > ip addresses etc.
>
> Well, a few clarifications - 192.168.x.y is a private range and must
> not be routed on the Internet (won't work anyway) and should not
> generally be routed to another organization (unless you have a close
> relationship and coordinate the use of these addresses.)
>
> So, if you really mean 192.168.42.y then it doesn't matter; just create
> 168.192.in-addr.arpa (the entire 192.168.x.y net) and it will include
> any address you own -- you only fill in the ones that exist.
>
> If you really mean some public range, then in some (real) sense the
> ISPs own those addresses and almost always handle the reverse
> zones for them -- if you need an entry for you 1 to a few permanent
> entries on the Intenet, you send the ISP an email making the request.
> Many times they just put "generic" entries in Host-192.168.12.4 etc.
> or Dial-x.y.x to avoid the problem.
>
> > can the ip of the email server be set to a different network eg can my
> > friends MX record point to my
> > mail server.
>
> Absolutely.  Think about all the email servers in the world that handle
> email for multiple companies/organizations...or the ISPs that handle
> email for customer DOMAINS outside their own but use the same
> email server for all of this.
>
> The Email server (software) should generally use the SAME NAME
> as the Reverse will return if someone looks it up -- this might not
> have any relationship to the email domains for which it receives mail.
> (e.g., My email server has a name but it receives mail for LearnQuick.Com
> and HerbMartin.Com and a bunch of other domain names.)
>
> > what if you have groups of ip addresses in different ranges at need to
be
> > under the same domain.
>
> Forward zones are reverse zones are "technically" unrelated to each other.
> So in the forward zone you just put the correct address in there, e.g.,
> www.LearnQuick.Com is somewhere in Virginia, but my other machines
> abc.LearnQuick.Com are elsewhere and use different ranges of IPs -- all
> go in the same forward zone.
>
> Reverse zone records might not even be necessary for many of your
> machines -- may be just a wasted of time in 9/10 cases.
>
> > also once a domain is registered are you free to do what you want
hostname
> > wise.
>
> Within the limits of the RFCs and good judgement (like I wouldn't use
> Unicode
> names without a "good reason" even though the latest RFCs may make this
> legal or my DNS server may support them as they might mess up older DNS
> server or client resolution.)
>
> I wouldn't use _underscores in a NetBIOS name nor -dashes in a host name
> since I run Windows networks and these legal characters don't work well
> on the opposite naming system for machines that have names in both name
> spaces.  Also, I won't make a NetBIOS name start with a number just
> because it is legal.
>
>
>