LinuxQuestions.org
View the Most Wanted LQ Wiki articles.
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - Networking
User Name
Password
Linux - Networking This forum is for any issue related to networks or networking.
Routing, network cards, OSI, etc. Anything is fair game.

Notices

Reply
 
Search this Thread
Old 08-15-2010, 11:31 AM   #1
fast-reflexes
Member
 
Registered: Jul 2010
Distribution: Slackware
Posts: 36

Rep: Reputation: 16
DNS issues, all illegitimate DNS queries resolve to me!??!


I got an urgent problem...

When I do nslookups or traceroutes on my server... Everything that doesnt have legitimate DNS resolves to me... I had a wildcard A record which I deleted and replaced with the subdomains I actually have, could that have been it?

If I were to traceroute google.com it would find its way to google servers and an nslookup would bring me the IP.. however, if I were to traceroute something ridiculous like googlebroncgjsiosdj.com it traceroutes back to me as a subdomains to my own domain, that is

googlebroncgjsiosdj.com.mydomain.com

and the nslookup gives my ip.. the problem is that my mail server when doing the IP lookups believe that the mail is for my server and allows it.. after that I don't know where it goes because the user doesnt exist on my server and it doesn't see that at that time...

What's going on??? Thanks!
 
Old 08-16-2010, 02:16 PM   #2
MensaWater
Guru
 
Registered: May 2005
Location: Atlanta Georgia USA
Distribution: Redhat (RHEL), CentOS, Fedora, Debian, FreeBSD, HP-UX, Solaris, SCO
Posts: 6,014
Blog Entries: 5

Rep: Reputation: 787Reputation: 787Reputation: 787Reputation: 787Reputation: 787Reputation: 787Reputation: 787
When you removed the A record did you remember to increment your serial number in the zone file?
 
Old 08-17-2010, 06:29 AM   #3
fast-reflexes
Member
 
Registered: Jul 2010
Distribution: Slackware
Posts: 36

Original Poster
Rep: Reputation: 16
I had no idea what this was but thanks to you I have learnt a little more...

And to answer your question, no I didn't change the serial. One of the few things I don't host myself is DNS and the company that has the DNS servers do the serial numbers themselves. I can change other stuff in the SOA record but not serial. They do keep serials though since nslookup -type=soa returns a long serial number and since my DNS works after updating, I conclude that the numbers in the serial must be in increasing order, although the company doesn't follow the recommended standard (YYYYMMDDnn).

I send a mail and asked them out of curiosity... doubt I'll get an answer though.. It's not really the everyday question for
them I guess...

Im still VERY CURIOUS though as to why unresolvable addresses, when trying to resolve them from my server's ip, always resolved to myself when using wildcard DNS (*.server.com). I'd REALLY like someone to explain that to me... (and it wasn't just the server itself, all the computers behind the router, both Linux and Windows resolved things in this way)...
 
Old 08-17-2010, 06:38 AM   #4
fast-reflexes
Member
 
Registered: Jul 2010
Distribution: Slackware
Posts: 36

Original Poster
Rep: Reputation: 16
(Got an answer from DNS guys, they increase it by 1 every time automatically when updating DNS)
 
  


Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
DNS resolve issues - Dont know where to look studioq Linux - Networking 13 09-21-2007 05:36 PM
How does a client resolve dns queries with transparent proxy ? amitsharma_26 Linux - Security 5 09-17-2006 11:49 AM
DNS issues with /etc/resolve.conf dax379 Linux - Networking 4 04-21-2006 08:44 PM
Can't resolve DNS issues. Am I using the right ones? A6Quattro Linux - Networking 6 07-15-2005 08:59 PM
dns client cannot resolve on dns server jtvillegas Linux - Software 1 10-20-2003 04:18 AM


All times are GMT -5. The time now is 01:05 PM.

Main Menu
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
identi.ca: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration