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// Other services

Port 4078: Coordinated Security Service Protocol

Port 4078 is assigned by IANA to cssp (Coordinated Security Service Protocol).

4078

How cssp works

Other services
client:4078csspresponse client:4078csspresponse

The client sends a request to port 4078 and the cssp service answers.

Transport
TCP
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 4078 dangerous?

We have no specific security note for port 4078. 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 4078

ServicePortTransportDescriptionReferenceUpdated
cssp 4078 TCP Coordinated Security Service Protocol - 2008-05-01
-4078-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 4078, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4078'      # process listening on 4078
sudo lsof -nP -i :4078

macOS

sudo lsof -nP -i :4078

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4078 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4078
netstat -ano | findstr :4078

From another machine

nmap -p 4078 -sV <host>
nc -zv <host> 4078

Block it in the firewall

sudo ufw deny 4078/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4078" -Direction Inbound -LocalPort 4078 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 4078 used for?

Port 4078 is assigned by IANA to cssp (Coordinated Security Service Protocol).

Is port 4078 TCP or UDP?

Port 4078 is registered for TCP.

Is it safe to open port 4078?

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 4078 is open?

On Linux run "ss -ltnup 'sport = :4078'", on macOS "lsof -nP -i :4078", and on Windows "netstat -ano | findstr :4078" to see the local process. From another machine, "nmap -p 4078 <host>" shows whether it is reachable.

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