The vote by the U.S. Congress to repeal rules that limit how internet service providers can use customer data has generated renewed interest in an old internet technology: virtual private networks, or VPNs.

VPNs cloak a customer’s web-surfing history by making an encrypted connection to a private server, which then searches the Web on the customer’s behalf without revealing the destination addresses. VPNs are often used to connect to a secure business network, or in countries such as China and Turkey to bypass government restrictions on Web surfing.

Privacy-conscious techies are now talking of using VPNs as a matter of course to guard against broadband providers collecting data about which internet sites and services they are using.

“Time to start using a VPN at home,” Vijaya Gadde, general counsel of Twitter, said in a tweet on Tuesday that was retweeted by Twitter Chief Executive Jack Dorsey.

Gadde was not immediately available for comment. Twitter said she was commenting in her personal capacity and not on behalf of the company.

The Republican-led U.S. House of Representatives voted 215-205 on Tuesday to repeal rules adopted last year by the Federal Communications Commission under then-President Barack Obama to require broadband providers to obtain consumer consent before using their data for advertising or marketing.

The U.S. Senate, also controlled by Republicans, voted 50-48 last week to reverse the rules. The White House said President Donald Trump supported the repeal measure.

Supporters of the repeal said the FCC unfairly required internet service providers like AT&T, Comcast and Verizon to do more to protect customers’ privacy than websites like Alphabets Google or Facebook.

Critics said the repeal would weaken consumers’ privacy protections.

VPN Advantages, Drawbacks

Protected data includes a customer’s web-browsing history, which in turn can be used to discover other types of information, including health and financial data.

Some smaller broadband providers are now seizing on privacy as a competitive advantage. Sonic, a California-based broadband provider, offers a free VPN service to its customers so they can connect to its network when they are not home. That ensures that when Sonic users log on to wi-fi at a coffee shop or hotel, for example, their data is not collected by that establishment’s broadband provider.