§ 100a StPO (Telekommunikationsüberwachung), probably § 100b StPO (Online-Durchsuchung) as well. An interesting thing is that lately authorities not only requ

§ 100a StPO (Telekommunikationsüberwachung), probably § 100b StPO (Online-Durchsuchung) as well. An interesting thing is that lately authorities not only request logging of IP addresses, but also the port which initiated the connection. For some time I thought that this was ridiculous, but then it turns out that if you use a VPN or a DS-Lite-Gateway, the port will allow you to be identified. Edit: I'm using this edit as a reply to the follow-up question, since I can't reply to it directly. While you are right that a specific domain can't be censored, the provider can be instructed to log requests for that domain name and provide the timestamp/IP/port to the authorities, as well as answer to the client with modified data.