Go Back   HowtoForge Forums | HowtoForge - Linux Howtos and Tutorials > Linux Forums > Server Operation

Do you like HowtoForge? Please consider supporting us by becoming a subscriber.
Reply
 
Thread Tools Display Modes
  #1  
Old 28th February 2008, 17:10
winux winux is offline
Junior Member
 
Join Date: Feb 2008
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
Default Cannot resolve internal hostnames

I have a Linux server running DHCP server and DNS server. I configured the DHCP server to send out the name-server address of the server. I can successfully browse the internet from the clients, so I know that external DNS resolution is working fine. I also see by the DHCP leases that the hostname is being sent by the clients.

However, I cannot ping any of the Linux boxes from any machine by their hostname.

Can anyone point me in the right direction?

Thanks.
Reply With Quote
Sponsored Links
  #2  
Old 28th February 2008, 19:57
chipsafts chipsafts is offline
Senior Member
 
Join Date: Nov 2007
Posts: 184
Thanks: 2
Thanked 6 Times in 6 Posts
Default

can you ping the other Linux boxes from the DNS server?

can the Linux boxes ping the clients?

do the clients have any firewall settings regarding ping?
Reply With Quote
  #3  
Old 28th February 2008, 20:03
winux winux is offline
Junior Member
 
Join Date: Feb 2008
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
Default

I can ping by IP address across all the machines. No client can ping anything by name internally (though external DNS resolutions works fine). No firewalls.
Reply With Quote
  #4  
Old 29th February 2008, 15:02
falko falko is offline
Super Moderator
 
Join Date: Apr 2005
Location: Lüneburg, Germany
Posts: 41,701
Thanks: 1,900
Thanked 2,749 Times in 2,579 Posts
Default

Do the name servers resolve the internal hostnames correctly? You can check it like this:
Code:
dig @1.2.3.4 internal.hostname.tld
Please replace 1.2.3.4 with the IP addresses of your name servers.
__________________
Falko
--
Download the ISPConfig 3 Manual! | Check out the ISPConfig 3 Billing Module!

FB: http://www.facebook.com/howtoforge

nginx-Webhosting: Timme Hosting | Follow me on:
Reply With Quote
  #5  
Old 29th February 2008, 22:11
chipsafts chipsafts is offline
Senior Member
 
Join Date: Nov 2007
Posts: 184
Thanks: 2
Thanked 6 Times in 6 Posts
Default

wonder if the DNS is setup for external and internal access.
then could be that the internals are not setup or incorrect while the external is fine.
Reply With Quote
  #6  
Old 16th September 2009, 09:30
brainz brainz is offline
Senior Member
 
Join Date: Feb 2006
Location: Sydney, Australia
Posts: 165
Thanks: 9
Thanked 3 Times in 1 Post
 
Red face

My question would be is what router are you using ???

The reason why i ask this is most Home routers now have taken out what they call NAT loopback...

So if this is the case i would contact the manufacturer of the router and findout what pervious version of the router firmware the NAT Loopback was still included and if the routers fireware can be flashed back to the version that contained NAT loopback...

The reason i say this is i have the same problem... So i purchased a HP procurve 7102dl router and i am having problems configuring it to where i am back to the way our system worked.

regards
brainz
__________________
www.baktim.com
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
got 500 internal server error tried to enable chmod from FTP smilem Installation/Configuration 13 17th January 2008 02:34
Internal View DNS plucchetti Installation/Configuration 3 14th August 2007 16:03
ssl on multiple internal IPs bruma Installation/Configuration 1 9th October 2006 12:30
Internal IP in control panel madlew Installation/Configuration 2 21st March 2006 13:49


All times are GMT +2. The time now is 15:11.


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