UK ISPs have been summoned to Downing Street for a consultation on how best to tackle terrorist propaganda online.
The meeting will focus on what measures broadband providers can take to curb extremist content, through the use of such measures as extra-powerful filters.
Gordon Brown issued the invitation to ISPs during a speech this week, which focussed on the government's future anti-terrorist strategy.
Mr Brown said that home secretary Jacqui Smith was "inviting the largest global technology and Internet companies to work together to ensure that our best technical expertise is galvanised to counter online incitement to hatred".
However, Mr Brown's proposals have been greeted cautiously by a senior ISP industry policy source, who expressed bemusement as to how the principles would translate into policy.
The unnamed source told Ispreview.com: "That depends on what it actually means. Right now, I've no idea, and I don't think anyone else in the industry does."