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Questions tagged [reverse-dns]

Reverse DNS lookup is the determination of a domain name that is associated with a given IP address using the Domain Name System (DNS) of the Internet.

Reverse DNS lookup or reverse DNS resolution (rDNS) is the determination of a domain name that is associated with a given IP address using the Domain Name System (DNS) of the Internet.

Computer networks use the Domain Name System to determine the IP address associated with a domain name. This process is also known as forward DNS resolution. Reverse DNS lookup is the inverse process, the resolution of an IP address to its designated domain name.

Source: Wikipedia.

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Centos bind DNS server configuration with ipv6

in order to APPLE , after 1 June all applications must support the ipv6 so i need to reconfigure my ios app. So i create a local network with ipv6. My topology is below. i configured bind 9.8 on centos A and AAAA record and PTR record. i can query…
Yasin Caner
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How to check name servers for reverse DNS

I use whois example.com to check which are the authoritative name servers for that domain. Now I want to know which are the authoritative name servers for a block of IP addresses for their PTR records, how can I check that? Thanks.
Qian Chen
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Why SMTP Reverse DNS Mismatch Reverse DNS does not match SMTP Banner?

I have set rDNS to mail.simplyislam.biz for IP 178.32.48.104 with my hosting server and also in DNS control panel. However, I am still failing this test Result: SMTP Reverse DNS Mismatch Warning - Reverse DNS does not match SMTP Banner. See…
atifdarr
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Is having the same PTR hostname valid for multiple ip addresses?

Currently I have the following setup with two hostnames and two ips: cheeze1.mydomain.com IN A 123.123.123.111 111.123.123.123.in-addr.arpa IN PTR cheeze1.mydomain.com cheeze2.mydomain.com IN A …
dandan
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How to set up reverse DNS on Ubuntu 12.04 VPS

As far as I can remember when setting up my VPS and mail server on it, I had configured the mail server correctly. However, a few of my clients get SMTP errors, host mx1.zonnet.nl[62.58.50.9] said: 553 We do not accept mail from IP addresses…
Sander Schaeffer
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How do providers plan to deal with rDNS for client /64 IPv6 blocks when assigned?

The standard block assigned to a home will be a /64 block to enable autoconfigure. This means the traditional reverse DNS mapping of host-237.miami.ispname.com is not only practical, it's improbable even if generated automatically with 2^64 entries…
John Spade - 'DaSpadeR'
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Having trouble interpreting mail log DNS errors

I have a postfix mail server on Debian. A client of mine just informed me that they were unable to send an email to me and it appears that there is a problem with their mail server. I would like to get back to them with the actual problem, but I'm…
Mike
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named-checkzone reports 'ns.example.com.ns' has no address records (A or AAAA)

The first thing I see wrong is that its a recursion problem. But I'm not sure where the problems lie in my reverse lookup file. ns should report back as ns.example.com but instead getting ns.example.com.ns. Of course it wouldn't find any entries…
Chad Harrison
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Odd entries in DNS lookup log

With BIND (named) enabled on an OS-X Lion iMac, I can get a list of queries as they occur. In the list are some very strange entries, listed below. Can anyone shed some light on these? (Note that the iMac is at 192.168.1.3) : query: xdnrhkbqnn IN A…
William Morris
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hotmail blacklist and rDNS questions

My company has recently purchased a VPS for email and webhosting. I am not an expert on email authentication but here is my story. After the VPS was purchased we started receiving bouncebacks with the error message from hotmail.com: 550 SC-001…
DBIT
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Multiple PTR records

In your experience, have you found there to be any actual problems with having redundant PTR records (same name, multiple IPs) for a given host? Additionally, would you expect to see corresponding A or CNAME records for each PTR? EDIT: Wow, thank…
mikewaters
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DNS, should I be using A instead of CNAME?

I'm doing a big reshuffle of our websites and hosting, moving about 10 domains to a new server. In doing so I had to make some changes to the DNS, pointing all of the domains at the new server. Instead of pointing all of the DNS records at the IP…
Ben Everard
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DNS Server Configuration problem , PTR records

I have a server that using Windows server 2003 , and Microsoft DNS Server. I have a problem on my DNS setting ERROR: No reverse DNS (PTR) entries. The problem MX records are: 225.208.20.***.in-addr.arpa -> no reverse (PTR) detected You should…
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Moving from one ISP to another; DNS PTR question

We are going to be moving from one ISP to another in the next month or so, and I will be changing the TTL's down to 60 seconds on the DNS servers that I have authority for, but our current ISP has authority for the reverse DNS zone. Since this is…
bgarlock
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Is there a way to resolve an IP address to all domains resolving to that IP?

Possible Duplicate: Finding all domain names that resolve to the same ip? I am trying to find out if a dedicated server at a hosting site I am using has more than one domain pointing to it through DNS. Is there a way to do a reverse DNS lookup…
GregH
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