The police are seeking powers to shut down websites deemed to be engaged in "criminal" activity.
The Serious and Organised Crime Agency (SOCA) has tabled a plan for Nominet, which oversees .uk web addresses, to be given the domain closing power.
Nominet said the idea was only a proposal and invited people to join the debate on the form of the final policy.
IT lawyers said the proposal would be "worrying" if it led to websites going offline without judicial oversight.
"It's not policy at this stage," said Eleanor Bradley, director of operations at Nominet.
She said SOCA's proposal emerged from changes made to Nominet's policy development process earlier in 2010, as well as experiences with closing down a series of criminal sites in the last 12 months.
BBC News | 26 November 2010 - read full post.