Port 194 (IRC)
TCPInternet Relay Chat — IRC listens on port 194 by default.
What is Port 194?
Port 194 is the official IANA-assigned port for IRC (Internet Relay Chat), a text-based real-time communication protocol. IRC has been a cornerstone of online communities since 1988, enabling group discussions in channels and private messaging.
IRC on port 194 provides multi-user chat rooms (channels), private messaging, and file transfers. The protocol uses a client-server model where IRC networks consist of interconnected servers. While port 194 is the official assignment, most IRC servers actually listen on port 6667 due to historical convention.
IRC traffic on port 194 is unencrypted. Modern IRC networks support TLS on port 6697. While IRC has been largely replaced by Discord, Slack, and Matrix for casual use, it remains popular in open-source communities and tech circles.
Port 194 Security
IRC on port 194 should be secured with appropriate access controls and monitoring. Ensure the service is only accessible from trusted networks by configuring firewall rules to restrict access. If the protocol supports encryption, enable TLS/SSL to protect data in transit.
Regularly update IRC to the latest version to patch known vulnerabilities. Monitor port 194 for unauthorized access attempts and implement rate limiting where possible. Follow the principle of least privilege when configuring access permissions.
How to Check Port 194
To check if port 194 is open on a remote host, use nmap: 'nmap -p 194 hostname'. For a quick TCP connection test, use: 'telnet hostname 194' or 'nc -zv hostname 194'. On Windows PowerShell, use: 'Test-NetConnection -ComputerName hostname -Port 194'.
To check if port 194 is listening on your local machine, use: 'netstat -tlnp | grep 194' on Linux, or 'ss -tlnp | grep 194'. On Windows, use: 'netstat -an | findstr 194'. For a comprehensive scan, use: 'nmap -sV -p 194 hostname' to detect the service version running on the port.
Related Ports
Frequently Asked Questions
What is port 194 used for?
Port 194 is the default port for Internet Relay Chat (IRC). It is used for irc communication using the TCP protocol.
Is port 194 TCP or UDP?
Port 194 uses TCP. TCP is used because irc requires reliable, ordered data delivery.
Should port 194 be open?
Port 194 should only be open if you are actively running IRC. Close unused ports to reduce your attack surface. If needed, restrict access to trusted IP addresses using firewall rules.
How do I check if port 194 is open?
Use 'nmap -p 194 hostname' to scan remotely, or 'netstat -tlnp | grep 194' to check locally on Linux. On Windows, use 'Test-NetConnection -Port 194 hostname' in PowerShell.
How do I secure port 194?
Secure port 194 by restricting access with firewall rules, using encryption (TLS/SSL) where supported, keeping IRC updated, using strong authentication, and monitoring for unauthorized access attempts.
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