A network apparatus receives a connection request from a client computing device toward a target computing device. Next a target identifier that identifies the target computing device is extracted from the connection request. The connection request is sent to the target computing device and a reputation request with the target identifier is sent to a web resource analyser engine. In response to detecting that a response from the target computing device is received before a response from the web resource analyser engine, the response to the connection request from the target computing device is held by performing a rewrite in a target section of a user-space utility program rule and by using operating system kernel module in user-space memory area of the network apparatus. In response to a receipt of the response from the web resource analyser engine, the response to the connection request is released.