Bloquing DNS lokups

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abena

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#11828 14-Feb-2007 05:30

Hi, I've trying to block some DNS lookups, but i'm not sure how to do it.... i need someone to explain me pleaseeeee

freitasm

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#60736 14-Feb-2007 08:49

Is this from your PC or a network? And just some IP addresses?

If it's your PC and just some IP addresses, then you can add an entry to the HOSTS file like ths:

127.0.0.1 domain

This will point such domain to localhost...

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abena

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#60751 14-Feb-2007 11:26

Well.... let me explain you what i'm triyng to do... is just for my pc, is not a network... I'm trying to disable the "gmail chat" and to do so, i must block a DNS, but i really dont know how, and about the host files... i don´t know which is it.

Thanks freitasm!

freitasm

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#60753 14-Feb-2007 11:29

Well, this works if you know the IP addresses and the server names. Open notepad and add the line with IP address and server name to \windows\system32\drivers\etc\hosts (replace \windows with the folder where your Windows is installed if not the default).

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abena

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#60757 14-Feb-2007 11:39

Ready!, it works....

THANKS!

abena

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#61179 19-Feb-2007 08:57

Hi!, I'm trying to block the Windows Live Messenger, blocking the DNS lookup on the hosts file, I've be trying this:

# MSN Messenger
127.0.0.1 messenger.hotmail.com
127.0.0.1 get.live.com
127.0.0.1 messenger.msn.com
127.0.0.1 messenger.msn.es
127.0.0.1 www.messenger.hotmail.com
127.0.0.1 www.get.live.com
127.0.0.1 www.messenger.msn.es

And then setting the hosts file as "Read Only" but it doesn`t work, the msn is still working... How do I know which DNS is the right one???

freitasm

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#61180 19-Feb-2007 09:14

I think those URL should all be left out of the hotsts file. Try blocking this one as a start: gateway.messenger.hotmail.com. If you want you can also try blocking with some software, for example http://www.plevna.f9.co.uk/blockmsnmessenger.htm.

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abena

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#61200 19-Feb-2007 11:46

Hi... firstable, thank you so much for your help Mauricio.... Well, i added the one you suggested me, but it didn't work either.... Now, my dude is bigger... is there any way to know which URLs is accessed by an specific program, i mean, how can i know, if there is a way, to know what URL is using my MSN, for example?

Thanks !!

abena

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#61227 19-Feb-2007 14:57

Ok, I could do it all ready, this is what I did:

On the Hosts file:
127.0.0.1 messenger.msn.com
127.0.0.1 messenger.hotmail.com

Set the file as "Read Only" and reboot.

It works perfectly, it blocks the use of the msn perfectly, and to unblock it again, just comment (#) the line

juha

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#61241 19-Feb-2007 15:51

Hola Abena. The Hosts file is quite a crude mechanism really, but you could try setting a Group Policy instead to prevent the use of certain programs. As Administrator, run "gpedit.msc" without the " quotes. On a single machine, drill down the Administrative Templates tree like so:
GPEDIT

And configure Windows Messenger not to run.

That's Windows Messenger though, and it may not work with MSN or Live Messenger, in case it's installed. For that, go into the User Configuration tree, Administrative Templates, and the System branch. In there, double-click the Don't run specified Windows applications item and list the IM programs you don't want to run.

If you have a Windows network with a Domain Controller and Active Directory, you won't have to specify the above on each machine of course.

Juha

abena

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#61242 19-Feb-2007 16:11

Wow!, that sounds really interesting!, but when i try "gpedit.msc" it says that the system can't find the file, I think this is because i'm using a Home Edition XP Version... Ii don't know if to execute "Regedit" is the same... is it?

juha

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#61243 19-Feb-2007 16:18

The Group Policy Editor Microsoft Management Console or gpedit.msc is not the same as the Registry Editor :).

It should be in your %windir%\system32 folder (like c:\windows\system32). Which version of Windows are you using?

But... if you're inexperienced as an administrator, please be careful here. If you make a mistake, you could lock yourself out of your system. Make sure you have back ups of everything.

Juha

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abena

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#61244 19-Feb-2007 16:23

I working on a home edition version, and I just read this: GPEDIT.MSC (Group Policy Editor) isn't available on XP Home Edition, partly because XP Home cannot join a domain by desig.... Is there any alternative??

Gracias Juha..

juha

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#61245 19-Feb-2007 16:36

Hmm, XP Home Edition is crippled so it's not easy to replicate the functionality found in XP Pro unfortunately. If upgrading to Pro isn't an option, your fastest and least painful way forward is to use Mauricio's tip. Yes, by hacking the Registry and/or installing the various files required by the Group Policy MMC, you can do what I suggested, but life's too short and it's summer in the southern hemisphere so...

Juha

abena

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#61246 19-Feb-2007 16:43

Jajaja.... it's ok Juha, now i'm gonna have to upgrate to XP Pro because of you... I want to try the "gpedit.msc"... when i do it, i
definitely let you know.

Hasta Pronto!

juha

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#61247 19-Feb-2007 16:48

OK... buena suerte with the upgrade and remember: back up. First. Before you do anything. :)

Juha