Port 247
subntbcst-tftp and subntbcst_tftp · TCP/UDP
| Range | System/well-known port (0–1023) |
|---|---|
| Protocol | TCP/UDP |
| Service | subntbcst-tftp and subntbcst_tftp |
Frequently asked questions
What is port 247 used for?
Port 247 is registered with the IANA for subntbcst-tftp and subntbcst_tftp (TCP/UDP). Description: SUBNTBCST_TFTP IANA assigned this well-formed service name as a replacement for "subntbcst_tftp".; SUBNTBCST_TFTP.
Is port 247 a well-known port?
Yes. Port 247 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 247 is open?
Locally on Linux with ss -tulpn | grep ':247\b', on Windows with netstat -ano | findstr :247. To test a remote host use Test-NetConnection <host> -Port 247 in PowerShell or nc -zv <host> 247 on Linux/macOS.
How do I open port 247 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 247/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=247/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 247" -Direction Inbound -Protocol TCP -LocalPort 247 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | subntbcst-tftp | SUBNTBCST_TFTP IANA assigned this well-formed service name as a replacement for "subntbcst_tftp". |
| TCP | subntbcst_tftp | SUBNTBCST_TFTP |
| UDP | subntbcst-tftp | SUBNTBCST_TFTP IANA assigned this well-formed service name as a replacement for "subntbcst_tftp". |
| UDP | subntbcst_tftp | SUBNTBCST_TFTP |