[windows2000] Blocking Internet Access On A Schedule THE SOLUTION - formerly Re: Re: Blocking Internet Browsing from Explorer.exe

  • From: Mark Lee <marklee15@xxxxxxxxx>
  • To: windows2000@xxxxxxxxxxxxx
  • Date: Fri, 28 Nov 2003 09:38:33 +0000 (GMT)

Ok Folks, as posted yesterday here's what we did.
1. Wrote a small EXE called BLOCKDNS.EXE which takes a few params but basically 
adds and entry from command line to the windows hosts file
2. All IE browsers etc. are forced by policy to use a web proxy, but bypassed 
for internal intranet
3. All PC's on internal IP so cannot directly surf anyways !
4. On schedule BLOCKDNS.EXE is called to add/remove to hosts file 
with our FQDN for the web proxy (might also want to call ipconfig /flushdns to 
be 100% sure cached entries are gone) 
This way, IE can still be used internally to access our Intranet etc. but 
cannot see the proxy, therefore, cannot see the outside world !   This works 
like a charm, students hate us even more now, staff think it's cool !


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