When you type a domain name into a web browser, your computer sends a request to a DNS server to find the corresponding IP address. This process is called name resolution. If the DNS server doesn't have the information cached, it will query other DNS servers until it finds the correct IP address or determines that the domain doesn't exist. Name resolution is necessary for the scanner to communicate using the email function or Internet connection function. If you use those functions, configure the DNS server settings. When you assign the scanner's IP address using the DHCP function of the DHCP server or router, it is automatically set.
The proxy server is placed at the gateway between a client (such as a user's computer) and another server (such as a web server) to process and forward requests. When you connect to a website through a proxy server, your request first goes to the proxy server, which then forwards it to the destination server. The response from the destination server then returns to the proxy server, which sends it back to you. The destination server communicates only with the proxy server. Therefore, scanner information (such as the IP address and port number) is hidden and increased security is expected. When you connect to the Internet via a proxy server, configure the proxy server on the scanner.