+ Post New Thread
Results 1 to 5 of 5
Windows Server 2008 R2 Thread, DNS(?) Problem in Technical; Have just changed ISPs and as a consequence the domain's subnet mask needed changing (or I hope it did - ...
  1. #1

    LeMarchand's Avatar
    Join Date
    Jan 2008
    Location
    The deepest pits of hell
    Posts
    2,332
    Thank Post
    315
    Thanked 363 Times in 264 Posts
    Rep Power
    161

    DNS(?) Problem

    Have just changed ISPs and as a consequence the domain's subnet mask needed changing (or I hope it did - couldn't access the outside world until I did, anyway). Everything seemed OK on the tested machines, but once more logged on things got flakey with various machines unable to access network resources. The machines can still ping the server by IP and name, but not connect to \\server\resource (or \\192.168.xxx.x\resource) - get network resource not found or an authentication request which will only work if different credentials are input.

    I've tried all sorts of things to no avail, far too many to list or remember!

    Also unable to apply a new Group Policy, but suspect that this is because the machines can't see the server at logon.

  2. #2

    LeMarchand's Avatar
    Join Date
    Jan 2008
    Location
    The deepest pits of hell
    Posts
    2,332
    Thank Post
    315
    Thanked 363 Times in 264 Posts
    Rep Power
    161
    I think/hope/pray that I have got this sorted (if I have, it was my sketchy knowledge of DNS that caused it ) but do have some questions:

    Where should one put ISP-provided DNS addresses?
    Should the local DNS server still be in the list (for school domain names)? If so, where in the list?

  3. #3

    Michael's Avatar
    Join Date
    Dec 2005
    Location
    Birmingham
    Posts
    9,266
    Thank Post
    242
    Thanked 1,575 Times in 1,254 Posts
    Rep Power
    341
    The ISP DNS server IPs should be in the Forwarders tab in DNS Server.

    I presume you've updated servers, printers and admin workstations which may have a static IP config? Everything else should work with DHCP Server.

  4. Thanks to Michael from:

    LeMarchand (18th April 2013)

  5. #4

    Join Date
    Jan 2009
    Location
    England
    Posts
    1,406
    Thank Post
    304
    Thanked 304 Times in 263 Posts
    Rep Power
    82
    Yup you should use your ISPs DNS servers as forwarders within your AD DNS servers setup. You should use your AD DNS servers as DNS servers for all of your internal machines.

  6. Thanks to Soulfish from:

    LeMarchand (18th April 2013)

  7. #5

    LeMarchand's Avatar
    Join Date
    Jan 2008
    Location
    The deepest pits of hell
    Posts
    2,332
    Thank Post
    315
    Thanked 363 Times in 264 Posts
    Rep Power
    161
    Thanks folks.

    I (eventually) put them in the right place, then - though it looks like I need to tweak things to match the second part of @Soulfish's answer.

    Normally I could remote in to a different server and check the setup there, but as that school is the first with the new ISP that's not easy to do. Been too busy/stressed/tired to think to look at the setup at other sites!

SHARE:
+ Post New Thread

Similar Threads

  1. DNS problem under Active Directory.
    By ArchersIT in forum Windows
    Replies: 6
    Last Post: 19th February 2007, 03:09 PM
  2. DNS Problem?
    By john in forum Wireless Networks
    Replies: 6
    Last Post: 13th April 2006, 11:37 PM
  3. DNS problems that are confusing.
    By tosca925 in forum Windows
    Replies: 13
    Last Post: 9th February 2006, 10:45 AM
  4. DNS Problem When Reinstalling XP
    By Pear in forum Wireless Networks
    Replies: 10
    Last Post: 5th January 2006, 03:27 PM
  5. DNS problem?
    By kingswood in forum Wireless Networks
    Replies: 9
    Last Post: 31st August 2005, 03:52 PM

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •