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// Other services

Port 887: ICL coNETion server info

Port 887 is assigned by IANA to iclcnet_svinfo (ICL coNETion server info), iclcnet-svinfo (ICL coNETion server info IANA assigned this well-formed service name as a replacement for "iclcnet_svinfo".).

887

How iclcnet_svinfo works

Other services
client:887iclcnet_svinforesponse client:887iclcnet_svinforesponse

The client sends a request to port 887 and the iclcnet_svinfo service answers.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned2 registered services
Range
Well-known (0-1023)
Category
Other services
01 Security

Is port 887 dangerous?

We have no specific security note for port 887. 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 887

ServicePortTransportDescriptionReferenceUpdated
iclcnet_svinfo 887 TCP, UDP ICL coNETion server info - -
iclcnet-svinfo 887 TCP, UDP ICL coNETion server info IANA assigned this well-formed service name as a replacement for "iclcnet_svinfo". - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 887, and is it reachable?

Linux

sudo ss -ltnup 'sport = :887'      # process listening on 887
sudo lsof -nP -i :887

macOS

sudo lsof -nP -i :887

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 887 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 887
netstat -ano | findstr :887

From another machine

nmap -p 887 -sV <host>
sudo nmap -sU -p 887 <host>
nc -zv <host> 887

Block it in the firewall

sudo ufw deny 887/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 887" -Direction Inbound -LocalPort 887 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 887 used for?

Port 887 is assigned by IANA to iclcnet_svinfo (ICL coNETion server info), iclcnet-svinfo (ICL coNETion server info IANA assigned this well-formed service name as a replacement for "iclcnet_svinfo".).

Is port 887 TCP or UDP?

Port 887 is registered for TCP and UDP.

Is it safe to open port 887?

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 887 is open?

On Linux run "ss -ltnup 'sport = :887'", on macOS "lsof -nP -i :887", and on Windows "netstat -ano | findstr :887" to see the local process. From another machine, "nmap -p 887 <host>" shows whether it is reachable.

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