Subscribers to the UK's four biggest broadband providers will soon have to opt in to view sexually explicit material, the government has announced.
Prime Minister David Cameron has announced plans to restrict access to adult websites, unless internet users actively wish to view such material.
The plans are geared to safeguard young people using the internet, and prevent them from viewing age-restricted content online.
Customers of BT, Virgin Media, Sky and TalkTalk will be affected by the coalition's proposal, which follows the recommendations made by the Bailey Review.
Earlier this year, Mr Cameron offered support for the report, penned by the Mothers' Union Chief Executive Reg Bailey, which called for greater protections for young people using the internet.
The report also called for age restrictions for music videos and the use of age-appropriate clothes for children in retail advertisements.
In addition, the Mothers' Union recommended the creation of a single website for parental complaints about programmes, adverts, products and services.
The Bailey Review stated: "We see filters as a hugely important tool and we would like to see manufacturers, retailers, internet service providers and others adopt an approach that is much more supportive of parents.
"It is not acceptable to expect parents to be solely responsible for what their children see online, and industry must take greater responsibility."