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// Other services

Port 3177: Phonex Protocol

Port 3177 is assigned by IANA to phonex-port (Phonex Protocol).

3177

How phonex-port works

Other services
client:3177phonex-portresponse client:3177phonex-portresponse

The client sends a request to port 3177 and the phonex-port service answers.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned1 registered service
Range
Registered (1024-49151)
Category
Other services
01 Security

Is port 3177 dangerous?

We have no specific security note for port 3177. Its risk depends on the program actually listening on it. General advice for other services services:

  • Close the port if nothing on the host needs it.
  • Identify the process that listens on it (commands below) before opening it in a firewall.
  • Expose a service only to the networks that use it.
02 Registry

IANA registry entries for port 3177

ServicePortTransportDescriptionReferenceUpdated
phonex-port 3177 TCP, UDP Phonex Protocol - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 3177, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3177'      # process listening on 3177
sudo lsof -nP -i :3177

macOS

sudo lsof -nP -i :3177

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3177 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3177
netstat -ano | findstr :3177

From another machine

nmap -p 3177 -sV <host>
sudo nmap -sU -p 3177 <host>
nc -zv <host> 3177

Block it in the firewall

sudo ufw deny 3177/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3177" -Direction Inbound -LocalPort 3177 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3177 used for?

Port 3177 is assigned by IANA to phonex-port (Phonex Protocol).

Is port 3177 TCP or UDP?

Port 3177 is registered for TCP and UDP.

Is it safe to open port 3177?

It depends on the program that listens on it. Open it only for a service you know and only to the networks that need it. Close the port if nothing on the host needs it.

How do I check if port 3177 is open?

On Linux run "ss -ltnup 'sport = :3177'", on macOS "lsof -nP -i :3177", and on Windows "netstat -ano | findstr :3177" to see the local process. From another machine, "nmap -p 3177 <host>" shows whether it is reachable.

05 Related
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