The government has put pressure on UK ISPs to introduce network-level filters that screen out pornography and other content deemed inappropriate.
But the filters have proved controversial.
Sky's system hit the headlines when it emerged that it was blocking a legitimate news website that covered file-sharing issues.
Meanwhile a BBC investigation found that filters were blocking out sex education websites.
Sebastien Lahtinen, co-founder of internet news site ThinkBroadband, told the BBC that the filters were easy to bypass.
"As soon as I type the filter name into Google it suggests the search term 'bypass'. The second result is a YouTube video of what sounds like a kid explaining how to work around it," he said.
"The report acknowledges that children often know more about the internet than their parents, and it is therefore no surprise that many children are able to bypass technical limitations put in place to restrict their access or delete their browsing history," he added.
"This only re-emphasises the need for active parenting and regular communications about how children use the internet, particularly at the age where they start doing so away from parents and on their own devices."