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// Other services

Port 3288: COPS

Port 3288 is assigned by IANA to cops (COPS).

3288

How cops works

Other services
client:3288copsresponse client:3288copsresponse

The client sends a request to port 3288 and the cops 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 3288 dangerous?

We have no specific security note for port 3288. 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 3288

ServicePortTransportDescriptionReferenceUpdated
cops 3288 TCP, UDP COPS - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 3288, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3288'      # process listening on 3288
sudo lsof -nP -i :3288

macOS

sudo lsof -nP -i :3288

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3288 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3288
netstat -ano | findstr :3288

From another machine

nmap -p 3288 -sV <host>
sudo nmap -sU -p 3288 <host>
nc -zv <host> 3288

Block it in the firewall

sudo ufw deny 3288/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3288" -Direction Inbound -LocalPort 3288 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3288 used for?

Port 3288 is assigned by IANA to cops (COPS).

Is port 3288 TCP or UDP?

Port 3288 is registered for TCP and UDP.

Is it safe to open port 3288?

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 3288 is open?

On Linux run "ss -ltnup 'sport = :3288'", on macOS "lsof -nP -i :3288", and on Windows "netstat -ano | findstr :3288" to see the local process. From another machine, "nmap -p 3288 <host>" shows whether it is reachable.

05 Related
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