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Computer Network Defence Ltd

UDP

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For UDP Frame Header in pdf
Respect to "Jax" The Packet Queen for the information on this page
"See the packets,
Feel the packets,
Be the packets!"

Common UDP Well-Known Server Ports
Port	Description	Port	Description
7	Echo	138	Netbios-dgm
19	Chargen	161	Snmp
37	Time	162	Snmp-trap
53	Domain	500	Isakmp
67	Bootps (DHCP)	514	Syslog
68	Bootpc (DHCP)	520	Rip
69	Tftp	33434	Traceroute
137	Netbios-ns

Length
The number of bytes in the entire datagram, including the header; minimum value = 8

Checksum
Covers pseudo-header and entire UDP datagram

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