Reverse DNS with IP range from Arin

Posted on 2011-09-22
Last Modified: 2012-12-06
I have two PTR records already setup with my ISPs for rDNS. I also have two IP blocks from My email is coming/going  on this IP from Arin. This IP is nat'd back to the spam filtering appliance which in turns forwards it to the exchange server.

Example: When i email someone that checks for rDNS the IP they see is (Not the ISP IP address). how do i assign a hostname to this IP?
Question by:cslt
  • 3
  • 3

Expert Comment

by:Benjamin MOREAU
ID: 36582871
I think you have full NAT configured (or one-to-one NAT).

So, simply ask your ISP to add a reverse DNS record on your @IP Your ISP can add reverse DNS on all @IP that he deliver to you.
LVL 21

Expert Comment

ID: 36583080
ARIN provides utilities for this.

Everything you should need for this can be found here.

Accepted Solution

cslt earned 0 total points
ID: 37142794
That didn't work. I am hiring a consultant to fix this issue.
PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.


Author Comment

ID: 37142798
Please close this question.
LVL 21

Expert Comment

ID: 37142942
What didn't work exactly?

Have you delegated NS authority for your IP blocks to a nameserver you can add a PTR record to?
LVL 21

Expert Comment

ID: 37211801
Hi, is this still an issue?

Author Closing Comment

ID: 38665369
Hired a consultant

Featured Post

Courses: Start Training Online With Pros, Today

Brush up on the basics or master the advanced techniques required to earn essential industry certifications, with Courses. Enroll in a course and start learning today. Training topics range from Android App Dev to the Xen Virtualization Platform.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
exchange, script, email address 7 42
Exchange - Retention Policy 4 31
Exchange 2013 certificate 8 35
voice mail Box feature on Lync 2010 3 20
Learn to move / copy / export exchange contacts to iPhone without using any software. Also see the issues in configuration of exchange with iPhone to migrate contacts.
This article aims to explain the working of CircularLogArchiver. This tool was designed to solve the buildup of log file in cases where systems do not support circular logging or where circular logging is not enabled
In this video we show how to create a Shared Mailbox in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.: First we need to log into the Exchange Admin Center. Navigate to the Recipients >> Sha…
This video shows how to quickly and easily add an email signature for all users on Exchange 2016. The resulting signature is applied on a server level by Exchange Online. The email signature template has been downloaded from: www.mail-signatures…

786 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question