Question : Looking for a proxy solution o control remote laptop users

I have 30 laptops that roam around the county using Sprint cards. Issue is, they have unrestricted access to the internet while they are outside of the office.

I was thinking of solutions I could use, and thought about this one:

Is there a way where I can setup and internal proxy server that would forward all internet requested through our sonicwall, hence they would be subject to the same content filtering standards as our inter office?

Any and all advice is appreciated in my scenario. Thank you.

Answer : Looking for a proxy solution o control remote laptop users

Assuming these users are part of a domain, you can enforce a proxy setting through group policy.  You can then host a proxy at your office that remote users can use to filter their connections.  If you choose to host your own proxy server, I would recommend squid.

http://squid.acmeconsulting.it/ - If you are solely based on windows machines.
http://www.squid-cache.org/ - If you would like to chose your own download package.

Depending on how you want to balance your efforts, you could go with a hosted proxy solution and set all of your network clients to filter their connections through it.