Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

How to determine DNS TTL Remaining

Posted on 2014-01-02
2
Medium Priority
?
806 Views
Last Modified: 2014-01-02
I am wondering if there is a way to determine how long a cached DNS record has been on a DNS server and subsequently how long it will be before the record expires and the DNS server will do a look up to the domains DNS servers.

For example, if I do not have direct access to my ISPs DNS server is there away I can do a query against that server via nslookup for example, and determine how long it will be before that DNS server will dump www.dogpile.com from its cache and requery the authoritative DNS server for dogpile.com.  I am not looking simply for the TTL as I can get that.  What I want I am looking for is how many seconds to go before the TTL expires on the query/caching server.
0
Comment
Question by:BladesAway
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 
LVL 9

Accepted Solution

by:
dipersp earned 2000 total points
ID: 39752794
Nslookup with -debug should do what you need.
0
 

Author Closing Comment

by:BladesAway
ID: 39752846
Perfect.

For others, the syntax is:

nslookup -debug - nameserver

;where name server is the IP or hostname of the DNS server.
0

Featured Post

Introducing the WatchGuard 420 Access Point

WatchGuard's newest access point includes an 802.11ac Wave 2 chipset, providing the fastest speeds for VoIP, video and music streaming, and large data file transfers. Additionally, enjoy the benefits of strong security as the 3rd radio delivers dedicated WIPS protection!

Question has a verified solution.

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

One of the most often confused topics in the area DNS is the idea of GLUE records. Specifically, what they are, when they are needed, when they are provided, and how they are created. First, WHAT IS GLUE? To understand GLUE, you must first under…
I wrote this article to explain some important DNS concepts that should be known to avoid some typical configuration errors I often see in forums. I assume that what is described here is the typical behavior of Microsoft DNS client. I don't know …
Monitoring a network: how to monitor network services and why? Michael Kulchisky, MCSE, MCSA, MCP, VTSP, VSP, CCSP outlines the philosophy behind service monitoring and why a handshake validation is critical in network monitoring. Software utilized …
Want to learn how to record your desktop screen without having to use an outside camera. Click on this video and learn how to use the cool google extension called "Screencastify"! Step 1: Open a new google tab Step 2: Go to the left hand upper corn…

721 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