UDP Port 19 – chargen

About UDP Port 19

The Internet Assigned Numbers Authority (IANA) registers port 19 for chargen. The IANA description reads: ‘Character Generator’. This port appears in 1 IDS rule and does not have notable malware activity indicators in our data.

IDS Rule References

1 IDS / security rule reference UDP port 19. Treat that number as context, not a danger score. Many detection rules are written against groups of ports rather than one service, web ports especially, so common web alternate ports inherit large counts while genuinely sensitive services can show few rules or none. Presence in IDS rules does not mean traffic on this port is malicious.

Rule categories (top 1): attempted-dos (1).

Sample rule descriptions for UDP port 19:

• SERVER-OTHER UDP echo+chargen bomb

Data Sources

This information is compiled from: IANA Service Name and Transport Protocol Port Number Registry and Snort Community Rules (GPLv2).