Sep 22, 2017
Xbox One (LIVE) ports: 3074 TCP/UDP, 53 TCP/UDP, 80 TCP, 88 UDP, 500 UDP, 3544 UDP, 4500 UDP isakmp_sub_print in tcpdump 3.6 through 3.7.1 allows remote attackers to cause a denial of service (CPU consumption) via a certain malformed ISAKMP packet to UDP port 500, which causes tcpdump to enter an infinite loop. References: [CVE-2003-0108] UDP 500 - Port Protocol Information and Warning! UDP Port 500 may use a defined protocol to communicate depending on the application. A protocol is a set of formalized rules that explains how data is communicated over a network. Think of it as the language spoken between computers to help them communicate more efficiently. GRC | Port Authority, for Internet Port 500 Port 500 is used by most IPSEC-based VPN systems for the establishment of securely encrypted "tunnels" between endpoint machines. Users of firewalls or routers that must pass or negotiate VPN connections may need to allow UDP traffic to cross on port 500. Feed Detail
UDP Scan (-sU) | Nmap Network Scanning
UDP 50 - Port Protocol Information and Warning! UDP Port 50 may use a defined protocol to communicate depending on the application. A protocol is a set of formalized rules that explains how data is communicated over a network. Think of it as the language spoken between computers to help them communicate more efficiently. How to open a udp port in windows 10 - Microsoft Community Jun 14, 2018
Port 4500 (tcp/udp) :: SpeedGuide
Solved: Opening ports UDP 500, 4500 and 123 - HughesNet