Port Description: Port 53 is opened by DNS (Domain Name Server) server and is mainly used for domain name resolution. DNS service is the most widely used service in NT system. Through DNS server, the conversion of domain name and IP address can be realized. As long as you remember the domain name, you can quickly visit the website.
Port vulnerability: If DNS service is turned on, hackers can directly obtain the IP addresses of hosts such as Web servers by analyzing DNS servers, and then use port 53 to break through some unstable firewalls, thus carrying out attacks. Recently, an American company also published 10 vulnerabilities that are most vulnerable to hackers, the first of which is the BIND vulnerability of DNS servers.
Operation suggestion: If the current computer is not used to provide domain name resolution service, it is recommended to close this port.