Linux - NetworkingThis forum is for any issue related to networks or networking.
Routing, network cards, OSI, etc. Anything is fair game.
Welcome to LinuxQuestions.org, a friendly and active Linux Community.
You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Registration is quick, simple and absolutely free. Join our community today!
Note that registered members see fewer ads, and ContentLink is completely disabled once you log in.
If you have any problems with the registration process or your account login, please contact us. If you need to reset your password, click here.
Having a problem logging in? Please visit this page to clear all LQ-related cookies.
There is less than 24 hours left to vote in the 2015 LinuxQuestions.org Members Choice Awards. Click here to go to the polls. Vote now and make sure your voice is heard!
Introduction to Linux - A Hands on Guide
This guide was created as an overview of the Linux Operating System, geared toward new users as an exploration tour and getting started guide, with exercises at the end of each chapter.
For more advanced trainees it can be a desktop reference, and a collection of the base knowledge needed to proceed with system and network administration. This book contains many real life examples derived from the author's experience as a Linux system and network administrator, trainer and consultant. They hope these examples will help you to get a better understanding of the Linux system and that you feel encouraged to try out things on your own.
Click Here to receive this Complete Guide absolutely free.
The owner of the IP block has to set up reverse DNS. It's largely ignored these days, but some quirky things still need it. Hopefully they have control over the block, to find out who ARIN has assigned it to, you can whois your IP.
xx.xx.xx.xx.in-addr.arpa. IN NS mail.mydomain.com.
The above is a delegation record, not a PTR record. Your ISP would enter this on their name server to delegate the SOA for the PTR record towards your name server. Should your ISP actually delegate PTR record SOA's (most do not), then the reverse zone file (not forward) on your name server would have:
xx.xx.xx.xx.in-addr.arpa. IN PTR mail.mydomain.com.
BTW: As others have pointed out, ISP's do not "typically" delegate PTR records to a customers name servers. But most will make the PTR record change on their name servers. Same net effect, but you have to go through the ISP to make any PTR changes.