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Urgent Help need creating a NETSH login script

Posted on 2009-07-14
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Last Modified: 2012-05-07
Here is my problem. I need to create a login script that will update the static DNS and WINS informatino on client workstation ONLY if these settings are already staticalyy assigned.

In a nutshell this script needs to check to see if the DNS settings are DHCP or Static basised. If they are DHCP the script should not run

Please help
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Question by:compdigit44
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18 Comments
 
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Expert Comment

by:Britt Thompson
ID: 24853704
Looks like someone already needed that here:http://www.experts-exchange.com/Networking/Misc/Q_21326998.html

@leew
for /f "tokens=3" %%a in ('netsh interface ip show config ^| find /i "DHCP Enabled"') do set DHCP=%%a
If /i "%dhcp%" == "Yes" (
    netsh interface ip set dns "Local Area Connection" dhcp
) Else (
    netsh interface ip set dns "Local Area Connection" static 10.0.0.3
)

You could actually avoid the environment variable entirely with this:

for /f "tokens=3" %%a in ('netsh interface ip show config ^| find /i "DHCP Enabled"') do (
If /i "%%a" == "Yes" (
    netsh interface ip set dns "Local Area Connection" dhcp
) Else (
    netsh interface ip set dns "Local Area Connection" static 10.0.0.3
)
)
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LVL 70

Expert Comment

by:Qlemo
ID: 24853749
Or, more comprehensive,

netsh int ip dump | findstr "dns wins" | findstr source=static && (
  rem your netsh commands here
)

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Author Comment

by:compdigit44
ID: 24855104
This is not quite what I was looking for...

I need this script to run ONLY on clients who have STATIC DNS & WINS enteries. please note some clients are set to DHCP for there TCP/IP settings but DNS is startic. I need this script to look for all static DNS & WINS and update these enteries only!!!!!!!!!!!!!!!!!!!!!!!
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Expert Comment

by:Qlemo
ID: 24856998
My script should work for exactly this situation. It's checking the DNS and WINS entries only for being static.
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Author Comment

by:compdigit44
ID: 24858502
OK this is what my scritp looks like. Right now I just paused on screen and never changes my static DNS / WINS settings

netsh int ip dump | findstr "dns wins" | findstr source=static && (netsh interface ip set dns "Local Area Connection" static 1.2.3.4
netsh interface ip add dns "Local Area Connection" 1.2.3.4 index=2
netsh interface ip set wins "Local Area Connection" static 1.2.3.4
netsh interface ip add wins "Local Area Connection" 1.2.3.4index=2)
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Expert Comment

by:Qlemo
ID: 24859878
Just tried, and it works fine for me. Does it output the config lines found?
0
 
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Author Comment

by:compdigit44
ID: 24860670
Whn I just run the first part of the script:

netsh int ip dump | findstr "dns wins" | findstr source=static
It works and list the connection information "IF" it has static DNS & WINS enteries which is what  want. The problem is this inforamtion is not beening replacement with the correct DNS & WINS information from my scrupt. Don't I need an if statement somewhere??????
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Expert Comment

by:Qlemo
ID: 24861464
No, the && is like an IF. If the previous command "succeeds", i.e. returns a errolevel of 0, the command after && is executed. You can try by using

netsh int ip dump | findstr "dns wins" | findstr source=static && echo --- It is STATIC ---


The complete command as you posted above should give the same output, plus the results of your netsh commands, which should be 4 times "OK!".

0
 
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Author Comment

by:compdigit44
ID: 24862254
Do I need the ( ) ??? in this script?
0
 
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Author Comment

by:compdigit44
ID: 24862293
Right now the script RUN and updates the DNS but it RUNS on my client who have DNS set by DHCP which is what I do not want
0
 
LVL 70

Expert Comment

by:Qlemo
ID: 24863471
You need the () to build a single block executed only if the condition applies (findstr finding "source=static"). If you omit the parentheses, only the first command is executed conditional, the remainder always.
0
 
LVL 20

Author Comment

by:compdigit44
ID: 24865178
Still now working... the script is working but it is running no matter if the current DNS settings are DHCP or static... :-(
0
 
LVL 70

Expert Comment

by:Qlemo
ID: 24870201
Your are doing something wrong. You confirmed that
netsh int ip dump | findstr "dns wins" | findstr source=static
is displaying the correct lines.
netsh int ip dump | findstr "dns wins" | findstr source=static && echo --- It is STATIC
Should display the same lines, and the text "--- It is STATIC" if any of the entries contain source=static.
netsh int ip dump | findstr "dns wins" | findstr source=static && ^
(
netsh interface ip set dns "Local Area Connection" static 1.2.3.4
netsh interface ip add dns "Local Area Connection" 1.2.3.4 index=2
netsh interface ip set wins "Local Area Connection" static 1.2.3.4
netsh interface ip add wins "Local Area Connection" 1.2.3.4index=2
)
Is applied if at least one of DNS or WINS setting is static.

0
 
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Author Comment

by:compdigit44
ID: 24870222
Do I need the ^ after the &&?
0
 
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Expert Comment

by:Qlemo
ID: 24870239
If you write the ( into the next line - yes. Instead you can use

netsh int ip dump | findstr "dns wins" | findstr source=static && (
netsh interface ip set dns "Local Area Connection" static 1.2.3.4
netsh interface ip add dns "Local Area Connection" 1.2.3.4 index=2
netsh interface ip set wins "Local Area Connection" static 1.2.3.4
netsh interface ip add wins "Local Area Connection" 1.2.3.4index=2
)

if you like that more.
0
 
LVL 20

Author Comment

by:compdigit44
ID: 24870332
I noticed that when this script runs it updates both my Local Area Connection and Network Adapter Local but I do not see Network Adapter Connection listed any where
0
 
LVL 70

Accepted Solution

by:
Qlemo earned 500 total points
ID: 24872245
Ok, we have to be more specific then:

netsh int ip dump | findstr "dns wins" | findstr /c:"Local Area Connection" | findstr source=static && (
netsh interface ip set dns "Local Area Connection" static 1.2.3.4
netsh interface ip add dns "Local Area Connection" 1.2.3.4 index=2
netsh interface ip set wins "Local Area Connection" static 1.2.3.4
netsh interface ip add wins "Local Area Connection" 1.2.3.4index=2
)

0
 
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Author Closing Comment

by:compdigit44
ID: 31603463
This worked perfectly....

Thanks Again
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