// REFERENCE
Port 19 (CHARGEN)
Protocol: TCP/UDP
Service: Chargen
High risk
The character generator, an obsolete diagnostic service. Over UDP it's a powerful DDoS amplification vector: it must never be open. Disable it.
Related tools
Work with this in:
Related
67
Port 67 (DHCP server) 68
Port 68 (DHCP client) 123
Port 123 (NTP) 161
Port 161 (SNMP) 162
Port 162 (SNMP Trap) 179
Port 179 (BGP)
Port 67 (DHCP server) 68
Port 68 (DHCP client) 123
Port 123 (NTP) 161
Port 161 (SNMP) 162
Port 162 (SNMP Trap) 179
Port 179 (BGP)
Assignments per the IANA port registry. Educational content.