Port 499
iso-ill · TCP/UDP
| Range | System/well-known port (0–1023) |
|---|---|
| Protocol | TCP/UDP |
| Service | iso-ill |
Frequently asked questions
What is port 499 used for?
Port 499 is registered with the IANA for iso-ill (TCP/UDP). Description: ISO ILL Protocol.
Is port 499 a well-known port?
Yes. Port 499 is in the range 0–1023 (system or well-known ports). On Linux and macOS only privileged processes may bind to these ports.
How do I check whether port 499 is open?
Locally on Linux with ss -tulpn | grep ':499\b', on Windows with netstat -ano | findstr :499. To test a remote host use Test-NetConnection <host> -Port 499 in PowerShell or nc -zv <host> 499 on Linux/macOS.
How do I open port 499 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 499/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=499/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 499" -Direction Inbound -Protocol TCP -LocalPort 499 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | iso-ill | ISO ILL Protocol |
| UDP | iso-ill | ISO ILL Protocol |