Measures, including methods, apparatus and computer program products, are provided for amending content transmitted from a server to a client. The methods are performed by a system configured to communicate with the server and the client. A method comprises: configuring a domain name service to route requests for pages hosted at the server to the system; receiving a request from the client for a page hosted at the server, the request being received on the basis of the configuring; transmitting the request to the server; receiving a page from the server corresponding to the transmitted request; searching the page for a predetermined item of content; selectively amending the content of the page to form a modified page on the basis of whether the predetermined item of content is found; and transmitting the modified page to the client.