CyberHunter
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// Other services

Port 5500: fcp-addr-srvr1

Port 5500 is assigned by IANA to fcp-addr-srvr1 (fcp-addr-srvr1).

5500

How fcp-addr-srvr1 works

Other services
client:5500fcp-addr-srvr1response client:5500fcp-addr-srvr1response

The client sends a request to port 5500 and the fcp-addr-srvr1 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 5500 dangerous?

We have no specific security note for port 5500. 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 5500

ServicePortTransportDescriptionReferenceUpdated
fcp-addr-srvr1 5500 TCP, UDP fcp-addr-srvr1 - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 5500, and is it reachable?

Linux

sudo ss -ltnup 'sport = :5500'      # process listening on 5500
sudo lsof -nP -i :5500

macOS

sudo lsof -nP -i :5500

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 5500 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 5500
netstat -ano | findstr :5500

From another machine

nmap -p 5500 -sV <host>
sudo nmap -sU -p 5500 <host>
nc -zv <host> 5500

Block it in the firewall

sudo ufw deny 5500/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 5500" -Direction Inbound -LocalPort 5500 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 5500 used for?

Port 5500 is assigned by IANA to fcp-addr-srvr1 (fcp-addr-srvr1).

Is port 5500 TCP or UDP?

Port 5500 is registered for TCP and UDP.

Is it safe to open port 5500?

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 5500 is open?

On Linux run "ss -ltnup 'sport = :5500'", on macOS "lsof -nP -i :5500", and on Windows "netstat -ano | findstr :5500" to see the local process. From another machine, "nmap -p 5500 <host>" shows whether it is reachable.

05 Related
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