1

There is a laptop which is to be secured and only certain websites should be accessible.

Reason is possible data theft by user or malware, from vpn-only-accessible websites which this laptop will be accessing daily.

Laptop is physically secured with lock and in a surveilled environment, USB ports are disabled.

For whitelisting particular sites, approach taken was to:

  1. Set IP to DHCP but DNS is manually entered, given a bogus server IP, which is inaccessible. So DNS look-up doesn't work.
  2. Add hosts records to c:\Windows\System32\drivers\etc\hosts . So DNS look-up for allowed websites works.
  3. By checking Chrome console errors, add other required asset hosting domains to file above (i.e jquery of particular website is sourced from cloudflare CDN and such.)
  4. User has limited privileges and can't make changes to above.

This method is cumbersome and I was wondering what other ways might be more suitable and easier to implement.

Hosts file sample:

X.X.X.X    allowed-website.com  
Y.Y.Y.Y    cdn.asset-domain.com 
1

You can enforce it via GPO. The steps are for GPO settings but you can use local GPO settings also.

Navigate to User Configuration > Policies > Windows Settings > Internet Explorer Maintenance > Security and then click on the “Security Zones and Content Ratings”

Modify Content ratings to "Import content ratings" > modify settings

  1. In the approved sites tab give your whitelisted url.
  2. In the General tab uncheck "User can see websites that have no rating"
  • Thanks for the answer amarnath. As user needs HTML5 content, will this also work with any browser other than Internet Explorer? – sdkks Dec 29 '16 at 21:55
1

I would put the restriction on the networking side. Program the nearest switch routers to only allow access to your approved sites. Then a rootkit or other malicious code that bypasses windows protections still won't have access to anything.

Idea #2

Setup your own DNS server which doesn't connect to the internet. Give it a hard coded list of acceptable websites.

  • This laptop is located at our remote office, this is the ideal solution but we are not ready for this yet. Eventually we will get a firewall that can do all these automatically. Meanwhile I still need an implementation that can be done only on laptop. – sdkks Dec 29 '16 at 21:54
  • @sdkks How about idea #2, your own dns server. – cybernard Dec 29 '16 at 22:04

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.