CyberHunter
Local dataset, no network
// Other services

Port 4557: Marathon everRun Quorum Service Server

Port 4557 is assigned by IANA to mtcevrunqss (Marathon everRun Quorum Service Server).

4557

How mtcevrunqss works

Other services
client:4557mtcevrunqssresponse client:4557mtcevrunqssresponse

The client sends a request to port 4557 and the mtcevrunqss service answers.

Transport
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 4557 dangerous?

We have no specific security note for port 4557. 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 4557

ServicePortTransportDescriptionReferenceUpdated
mtcevrunqss 4557 UDP Marathon everRun Quorum Service Server - 2009-06-18
-4557-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 4557, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4557'      # process listening on 4557
sudo lsof -nP -i :4557

macOS

sudo lsof -nP -i :4557

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4557 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4557
netstat -ano | findstr :4557

From another machine

nmap -p 4557 -sV <host>
sudo nmap -sU -p 4557 <host>
nc -zv <host> 4557

Block it in the firewall

sudo ufw deny 4557/udp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4557" -Direction Inbound -LocalPort 4557 -Protocol UDP -Action Block  # Windows
04 FAQ
What is port 4557 used for?

Port 4557 is assigned by IANA to mtcevrunqss (Marathon everRun Quorum Service Server).

Is port 4557 TCP or UDP?

Port 4557 is registered for UDP.

Is it safe to open port 4557?

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 4557 is open?

On Linux run "ss -ltnup 'sport = :4557'", on macOS "lsof -nP -i :4557", and on Windows "netstat -ano | findstr :4557" to see the local process. From another machine, "nmap -p 4557 <host>" shows whether it is reachable.

05 Related
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