Port 33435
mtrace · TCP/UDP
| Range | Registered port (1024–49151) |
|---|---|
| Protocol | TCP/UDP |
| Service | mtrace |
| Reference | RFC 8487 |
| Registered | 2017-12-13 |
| Modified | 2019-08-09 |
Frequently asked questions
What is port 33435 used for?
Port 33435 is registered with the IANA for mtrace (TCP/UDP). Description: Reserved; IP Multicast Traceroute.
Is port 33435 a well-known port?
No. Port 33435 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.
How do I check whether port 33435 is open?
Locally on Linux with ss -tulpn | grep ':33435\b', on Windows with netstat -ano | findstr :33435. To test a remote host use Test-NetConnection <host> -Port 33435 in PowerShell or nc -zv <host> 33435 on Linux/macOS.
How do I open port 33435 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 33435/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=33435/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 33435" -Direction Inbound -Protocol TCP -LocalPort 33435 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | – | Reserved |
| UDP | mtrace | IP Multicast Traceroute |