tcp,udp: DNS: DNS (Domain Name Service) used for domain name resolution. There are some attacks that target vulnerabilities within DNS servers. Cisco Webex Teams services uses these ports: 443,444,5004 TCP 53, 123, 5004, 33434-33598 UDP (SIP calls) Xbox 360 (Live) ports: 3074 TCP/UDP, 53 TCP/UDP, 80 TCP, 88 UDP
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networking - How to check if port 123 is ready for time
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