DNS Reverse lookup. HELP!

DNS Reverse lookup. HELP!

Post by Kyle Tol » Thu, 22 Jun 1995 04:00:00



Several FTP and WWW sites that I try to connect to deny me because
it can't determine my host name from my IP address.  They make a
comment like "please have youir network administrator fix this".

Unfortunatly, I am the defacto network admin and don't have a clue!  
I have the name to address part working in our DNS, but not sure what entries
to make to make the reverse happen.  Also, I don't particularly want
to (in fact specifically did not want to) put names in for all PCs on
the network (hundreds) into the DNS.  This sounds like I will have to.
Is there any way around it?

Any insight would be appreciated

 
 
 

DNS Reverse lookup. HELP!

Post by Ian Wilso » Tue, 27 Jun 1995 04:00:00


Quote:> Several FTP and WWW sites that I try to connect to deny me because
> it can't determine my host name from my IP address.  
<snip>
> I have the name to address part working in our DNS, but not sure what
> entries to make to make the reverse happen.  

You need your DNS server to be authoritative for the reverse domains
corresponding to your IP network number(s). For example if you have net
234.56.7.0 then your boot file should say
primary 7.56.234.in-addr.arpa   db.7.56.234
and the db file should say things like
6       IN      PTR     myhost.mydomain.xxx

Quote:> Also, I don't particularly want to (in fact specifically did not want
> to) put names n for all PCs on the network (hundreds) into the DNS.  

Bite the bullet - do it. Everything that has an IP address ought to be in
your DNS server whether its a mainframe, a mini, a PC, a print-server or
a kettle.

Quote:> This sounds like I will have to.

Yep.

Quote:> Is there any way around it?

If there is, ignore it and do it properly

Quote:> Any insight would be appreciated

There is a tool called h2n that, in its latest incarnations, makes
setting up this stuff fairly painless. HP-UX has a version called
hosts_to_named which I find very useful.

Have a peek at http://www.dns.net/dnsrd/

You do have the DNS bible don't you?
(DNS & Bind, Albitz & Liu, O'Reilly)

+--------------------------------------------------+
| Ian Wilson                                       |
| The higher you climb, the further you fall       |
|    The harder you try, the louder they cry       |
+--------------------------------------------------+

 
 
 

DNS Reverse lookup. HELP!

Post by Dan Strombe » Fri, 30 Jun 1995 04:00:00




>> Also, I don't particularly want to (in fact specifically did not want
>> to) put names n for all PCs on the network (hundreds) into the DNS.  

You might try getting a copy of "getethers" - it could be helpful in
generating a list of your PC's.
 
 
 

1. DNS reverse lookup..HELP

Hi
    I've problems configuring a double reverse lookups on a DNS server; I
heard about a wildcard on PTR records but cannot solve them, this cause
that ftp connections to places that make double reverse lookup (like
ftp.tis.com) are refused.

    I'm using SVR3 and BIND 4.9.2

       Could anybody give me some information about this ?

       Thanks

                        BETSY

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