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Re: Secure File download problems...

From: Men & Mice Support
Date: Monday, November 8, 1999
Time: 1:46:00 am

At 5:58 PM -0500 11/7/99, Rob Thiemann wrote:
>>Do you have the IP address in your reverse zone? That's usually what this
>>message is asking for.
>
>Yes. as I set them up i checked the create reverse DNS entry setting...

You have the following record:
184.41.201.209.in-addr.arpa. PTR pool1.dialin.184.netshak.com.

and
pool1.dialin.184.netshak.com. A 209.201.41.184

So, in theory, everything should be working, right? Wrong.

Your ISP has delegated your reverse records like this:
184.41.201.209.in-addr.arpa. NS alice.netshak.com.

but you have this:
41.201.209.in-addr.arpa. NS alice.netshak.com.

Because of the discrepancy, it is possible that some resolvers would call this a lame delegation. Your ISP has used a solution that is recommended against in the RFC's, though it does work if done right. Unfortunately, what you have isn't right.

There are two possible solutions (do only *one* of the following):

o Instead of having one reverse zone for the whole class C subnet (which you don't own anyway), you should have individual files for each address (because each address is delegated individually). Each file would have the following records (the SOA record is the Domain Information dialog):
184.41.201.209.in-addr.arpa. SOA alice.netshak.com.
rthiemann.netshak.com.
1999102700 ; serial
28800 ; refresh (8 hours)
7200 ; retry (2 hours)
604800 ; expire (7 days)
86400 ; minimum (1 day)
184.41.201.209.in-addr.arpa. NS alice.netshak.com.
184.41.201.209.in-addr.arpa. PTR pool1.dialin.184.netshak.com.

o Have your ISP convert to the solution recommended in RFC 2317. This would mean changing their records from this (abbreviated with BIND shorthand):
128 NS alice.netshak.com.
129 NS alice.netshak.com.
130 NS alice.netshak.com.
131 NS alice.netshak.com.
[...]

to this:
128 NS alice.netshak.com.
129 CNAME 129.128
130 CNAME 130.128
131 CNAME 131.128
[...]

You could then make a very simple change to your existing reverse zone file to make it work. In the Domain Information dialog, you would change the name of the zone from this:
41.201.209.in-addr.arpa.

to this:
128.41.201.209.in-addr.arpa.

This would change all of the PTR and NS records as well, so that they match up with the records in your ISP's file.

You might also ask your ISP to add another NS record, for hookah.netshak.com.
____________________________________________________________________
Chris Buxton cbuxton@menandmice.com
Men & Mice http://www.menandmice.com
Makers of: QuickDNS Pro



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