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// Other services

Port 3057: GoAhead FldUp

Port 3057 is assigned by IANA to goahead-fldup (GoAhead FldUp).

3057

How goahead-fldup works

Other services
client:3057goahead-fldupresponse client:3057goahead-fldupresponse

The client sends a request to port 3057 and the goahead-fldup 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 3057 dangerous?

We have no specific security note for port 3057. 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 3057

ServicePortTransportDescriptionReferenceUpdated
goahead-fldup 3057 TCP, UDP GoAhead FldUp - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 3057, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3057'      # process listening on 3057
sudo lsof -nP -i :3057

macOS

sudo lsof -nP -i :3057

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3057 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3057
netstat -ano | findstr :3057

From another machine

nmap -p 3057 -sV <host>
sudo nmap -sU -p 3057 <host>
nc -zv <host> 3057

Block it in the firewall

sudo ufw deny 3057/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3057" -Direction Inbound -LocalPort 3057 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3057 used for?

Port 3057 is assigned by IANA to goahead-fldup (GoAhead FldUp).

Is port 3057 TCP or UDP?

Port 3057 is registered for TCP and UDP.

Is it safe to open port 3057?

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 3057 is open?

On Linux run "ss -ltnup 'sport = :3057'", on macOS "lsof -nP -i :3057", and on Windows "netstat -ano | findstr :3057" to see the local process. From another machine, "nmap -p 3057 <host>" shows whether it is reachable.

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