Go Back   HowtoForge Forums | HowtoForge - Linux Howtos and Tutorials > ISPConfig 2 > General

Do you like HowtoForge? Please consider supporting us by becoming a subscriber.
Reply
 
Thread Tools Display Modes
  #1  
Old 11th March 2007, 01:19
alexillsley alexillsley is offline
Senior Member
 
Join Date: Dec 2006
Posts: 396
Thanks: 27
Thanked 4 Times in 4 Posts
Exclamation OpenDNS - Recursive

Hi,
How can i stop recursive lookups / open dns. It looks bad:
Code:
ERROR: One or more of your nameservers reports that it is an open DNS server. This usually means that anyone in the world can query it for domains it is not authoritative for (it is possible that the DNS server advertises that it does recursive lookups when it does not, but that shouldn't happen). This can cause an excessive load on your DNS server. Also, it is strongly discouraged to have a DNS server be both authoritative for your domain and be recursive (even if it is not open), due to the potential for cache poisoning (with no recursion, there is no cache, and it is impossible to poison it). Also, the bad guys could use your DNS server as part of an attack, by forging their IP address. Problem record(s) are:
I tryed adding "no recursive;" to my named.conf however that seem stop the server

Any ideas how i can secure my dns?

Thanks,
Alex
Reply With Quote
Sponsored Links
  #2  
Old 11th March 2007, 11:36
till till is offline
Super Moderator
 
Join Date: Apr 2005
Location: Lüneburg, Germany
Posts: 36,381
Thanks: 833
Thanked 5,482 Times in 4,316 Posts
Default

Do you use your own dns server as e.g.dns server on your workstation too? No recursive means that you disable this functionality, this does not mean that the DNS server is stopped in general.
__________________
Till Brehm
--
Get ISPConfig support and the ISPConfig 3 manual from ispconfig.org.

Last edited by till; 11th March 2007 at 11:39.
Reply With Quote
  #3  
Old 11th March 2007, 13:45
alexillsley alexillsley is offline
Senior Member
 
Join Date: Dec 2006
Posts: 396
Thanks: 27
Thanked 4 Times in 4 Posts
Default

Yes im using my own dns server. This is what i mean: http://www.dnsstuff.com/tools/dnsrep...ylerscott.info
Reply With Quote
  #4  
Old 11th March 2007, 14:15
Hawker Hawker is offline
Senior Member
 
Join Date: Feb 2007
Posts: 100
Thanks: 0
Thanked 9 Times in 9 Posts
Default

Quote:
Originally Posted by alexillsley
I tryed adding "no recursive;" to my named.conf however that seem stop the server
That should be...

recursion no;

In the options section of named.conf

You'll also need to add it to the ISPConfig named.conf.master so ISPConfig doesn't overwrite your changes.

What you entered would cause an error in Bind and it wouldn't start.
Reply With Quote
  #5  
Old 11th March 2007, 16:56
alexillsley alexillsley is offline
Senior Member
 
Join Date: Dec 2006
Posts: 396
Thanks: 27
Thanked 4 Times in 4 Posts
Default

Quote:
That should be...

recursion no;
Sorry thats what i meant to say

Quote:
You'll also need to add it to the ISPConfig named.conf.master so ISPConfig doesn't overwrite your changes.
I added it to named.conf after the line where it said
Quote:
//// make manual entries below this line ////
Reply With Quote
  #6  
Old 11th March 2007, 17:21
Hawker Hawker is offline
Senior Member
 
Join Date: Feb 2007
Posts: 100
Thanks: 0
Thanked 9 Times in 9 Posts
 
Default

recursion no; must go in the options section at the top of named.conf.
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

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 On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Recursive backup erk Installation/Configuration 2 30th May 2006 09:42


All times are GMT +2. The time now is 01:23.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.