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// Other services

Port 7878: Opswise Message Service

Port 7878 is assigned by IANA to owms (Opswise Message Service).

7878

How owms works

Other services
client:7878owmsresponse client:7878owmsresponse

The client sends a request to port 7878 and the owms 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 7878 dangerous?

We have no specific security note for port 7878. 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 7878

ServicePortTransportDescriptionReferenceUpdated
owms 7878 TCP Opswise Message Service - 2013-06-25
-7878-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 7878, and is it reachable?

Linux

sudo ss -ltnup 'sport = :7878'      # process listening on 7878
sudo lsof -nP -i :7878

macOS

sudo lsof -nP -i :7878

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 7878 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 7878
netstat -ano | findstr :7878

From another machine

nmap -p 7878 -sV <host>
nc -zv <host> 7878

Block it in the firewall

sudo ufw deny 7878/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 7878" -Direction Inbound -LocalPort 7878 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 7878 used for?

Port 7878 is assigned by IANA to owms (Opswise Message Service).

Is port 7878 TCP or UDP?

Port 7878 is registered for TCP.

Is it safe to open port 7878?

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 7878 is open?

On Linux run "ss -ltnup 'sport = :7878'", on macOS "lsof -nP -i :7878", and on Windows "netstat -ano | findstr :7878" to see the local process. From another machine, "nmap -p 7878 <host>" shows whether it is reachable.

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