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This is the support site for Andrews & Arnold Ltd, a UK Internet provider. Information on these pages is generally for our customers but may be useful to others, enjoy!

Reverse DNS: Difference between revisions

Reverse DNS (view source)

Revision as of 18:18, 12 January 2018

53 bytes added ,  12 January 2018
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==1. Auto Reverse (The Default)==
 
Auto reverse is the default option that works by AAISP filling in a PTR record for each IP4IPv4 address and a corresponding forward A record as well so that all of your IP addresses will have a valid reverse entry automatically. This is mainly for customers who are not interested in setting up any reverse entries but need something in place to avoid problems with some servers. If you also use A+reverse records in a domain then your IPs will have two PTR records, both valid.
 
Most ADSL customers will have a small block of IPs which they can delegate using CNAME if they want. However all ADSL lines also have a single IP address for the external (WAN) side of their [[ADSL Router|ADSL router]]. This is always delegated as a single zone for the IP address.
 
e.g.:
if you have the IPs <code>192.0.2.1</code> and <code>2001:DB8::1</code> reverses will be created of:
<code>1.2.0.192.in-addr.arpa</code>
<code>1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.8.b.d.0.1.0.0.2.ip6.arpa</code>
 
==2. A+Reverse or AAAA+Reverse on a Domain We Host ==
CecilWard
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