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From: Pascal.Gienger@uni-konstanz.de (Pascal Gienger)
Subject: Re: Hostname Instead of IP address
Newsgroups: comp.unix.bsd.freebsd.misc
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Date: 4 Jan 97 14:14:04 GMT
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root@nwpros.com wrote:
: On my dialups now, they all resolve to IP addresses. How can I have
: them resolveto a hostname. Would I need to run DNS on the dialup server
: or put entries in the main DNS server?
This is the classical question... The solution is named "reverse DNS mapping".
You must define a zone ".IN-ADDR.ARPA" in your named.boot-file.
(Supposing you are running BIND).
Then in that zone file, map IPs with PTR records to names.
Keep in mind that "100.150.200.250" as IP gets invoked as
"250.200.150.100.IN-ADDR.ARPA".
The numbers are reversed. So if you have a 192.168.38.x subnet, declare a zone
named "38.168.192.IN-ADDR.ARPA" and put your PTR records in it like
21 PTR i.checked.it.
22 PTR hugo.example.org.
So 192.168.38.22 is "hugo.example.org" and 192.168.38.21 is "i.checked.it".
For your dialups it would be something like
1 PTR gateway.dialup.myservice.com.
2 PTR modem1.dialup.myservice.com.
3 PTR modem2.dialup.myservice.com.
...... and so on
It is a pity that many Providers don't handle reverse DNS mapping anymore,
because they think it is not important or they don't know how to do it or
they use some sort of Microsoft DNS Server doesn't handling that correctly...
Pascal
--
Pascal.Gienger Zentrale Rechner Rechenzentrum Universität Konstanz
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