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// Messaging & queues

Port 4177: Wello P2P pubsub service

Port 4177 is assigned by IANA to wello (Wello P2P pubsub service).

4177

How wello works

Messaging & queues
producerconsumerqueuewello producerconsumerqueuewello

Producers publish messages into a queue on port 4177; consumers pick them up in order, at their own pace.

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
Messaging & queues
01 Security

Is port 4177 dangerous?

We have no specific security note for port 4177. Its risk depends on the program actually listening on it. General advice for messaging & queues services:

  • Require authentication and TLS on brokers and coordination services.
  • Restrict clients by network and per-topic or per-queue permissions.
  • Remove default accounts.
02 Registry

IANA registry entries for port 4177

ServicePortTransportDescriptionReferenceUpdated
wello 4177 TCP, UDP Wello P2P pubsub service - 2007-11-15

// source: IANA service name and port number registry

03 Check it

Which program uses port 4177, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4177'      # process listening on 4177
sudo lsof -nP -i :4177

macOS

sudo lsof -nP -i :4177

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4177 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4177
netstat -ano | findstr :4177

From another machine

nmap -p 4177 -sV <host>
sudo nmap -sU -p 4177 <host>
nc -zv <host> 4177

Block it in the firewall

sudo ufw deny 4177/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4177" -Direction Inbound -LocalPort 4177 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 4177 used for?

Port 4177 is assigned by IANA to wello (Wello P2P pubsub service).

Is port 4177 TCP or UDP?

Port 4177 is registered for TCP and UDP.

Is it safe to open port 4177?

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. Require authentication and TLS on brokers and coordination services.

How do I check if port 4177 is open?

On Linux run "ss -ltnup 'sport = :4177'", on macOS "lsof -nP -i :4177", and on Windows "netstat -ano | findstr :4177" to see the local process. From another machine, "nmap -p 4177 <host>" shows whether it is reachable.

05 Related
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