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Looking for a script to add multiiple DNS forwarders to a number of Microsoft DNS servers

Posted on 2008-10-27
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Last Modified: 2010-07-27
Can someone post a script that will allow me to add a new DNS conditional forwarders to a group of Group of Domain controllers. I would like to use a .CSV or .TXT input file to define 20+ DNS servers that the script can loop through.
I can use either DNSCMD or VBscript, whichever is easier.

I did find this article, http://codeidol.com/active-directory/active-directory/DNS-and-DHCP/Configuring-Forwarding/
however, im not sure how to modify the example scripts to reference a .csv or .txt input file.

thx in advance

M
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Question by:siber1
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Expert Comment

by:Shift-3
ID: 22815840
You can loop through entries in a text file with the FOR /F command as below.  Replace all instances of %G with %%G if you are including it in a batch script.


for /F %G in (computerlist.txt) do dnscmd %G /resetforwarders 10.22.3.4 10.22.3.5

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Author Comment

by:siber1
ID: 22817941
HI shift, I just tested that in my home lab and it didn't add the forwarders.
I tried this script, but it is not working. what should I change:
@echo off
setlocal
 
set list=c:\list.csv
for /F %%G in ("%list%") do dnscmd %%G /zoneadd test.com /forwarder 10.1.10.1 10.1.10.2
 

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Accepted Solution

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Shift-3 earned 500 total points
ID: 22817973
The quotes around %list% are the problem; they're causing it to be interpreted as a text string.  You can avoid this by using the usebackq parameter.

@echo off
setlocal
 
set list=c:\list.csv
for /F "usebackq" %%G in ("%list%") do dnscmd %%G /zoneadd test.com /forwarder 10.1.10.1 10.1.10.2

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Author Comment

by:siber1
ID: 22821042
thx Shift, one last question. do you know if there is a way to delete all conditional forwarders using dnscmd or a VB script?

thx much

M.
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Expert Comment

by:Shift-3
ID: 22821137
dnscmd <server> /resetforwarders should do it.
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Author Closing Comment

by:siber1
ID: 31510464
thx again
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LVL 38

Expert Comment

by:Shift-3
ID: 22822783
Wow, a B.
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