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// Other services

Port 1887: FileX Listening Port

Port 1887 is assigned by IANA to filex-lport (FileX Listening Port).

1887

How filex-lport works

Other services
client:1887filex-lportresponse client:1887filex-lportresponse

The client sends a request to port 1887 and the filex-lport 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 1887 dangerous?

We have no specific security note for port 1887. 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 1887

ServicePortTransportDescriptionReferenceUpdated
filex-lport 1887 TCP, UDP FileX Listening Port - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1887, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1887'      # process listening on 1887
sudo lsof -nP -i :1887

macOS

sudo lsof -nP -i :1887

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1887 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1887
netstat -ano | findstr :1887

From another machine

nmap -p 1887 -sV <host>
sudo nmap -sU -p 1887 <host>
nc -zv <host> 1887

Block it in the firewall

sudo ufw deny 1887/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1887" -Direction Inbound -LocalPort 1887 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1887 used for?

Port 1887 is assigned by IANA to filex-lport (FileX Listening Port).

Is port 1887 TCP or UDP?

Port 1887 is registered for TCP and UDP.

Is it safe to open port 1887?

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 1887 is open?

On Linux run "ss -ltnup 'sport = :1887'", on macOS "lsof -nP -i :1887", and on Windows "netstat -ano | findstr :1887" to see the local process. From another machine, "nmap -p 1887 <host>" shows whether it is reachable.

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