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// Other services

Port 6118: Transparent Inter Process Communication

Port 6118 is assigned by IANA to tipc (Transparent Inter Process Communication).

6118

How tipc works

Other services
client:6118tipcresponse client:6118tipcresponse

The client sends a request to port 6118 and the tipc service answers.

Transport
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 6118 dangerous?

We have no specific security note for port 6118. 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 6118

ServicePortTransportDescriptionReferenceUpdated
tipc 6118 UDP Transparent Inter Process Communication - 2012-09-05
-6118-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 6118, and is it reachable?

Linux

sudo ss -ltnup 'sport = :6118'      # process listening on 6118
sudo lsof -nP -i :6118

macOS

sudo lsof -nP -i :6118

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 6118 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 6118
netstat -ano | findstr :6118

From another machine

nmap -p 6118 -sV <host>
sudo nmap -sU -p 6118 <host>
nc -zv <host> 6118

Block it in the firewall

sudo ufw deny 6118/udp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 6118" -Direction Inbound -LocalPort 6118 -Protocol UDP -Action Block  # Windows
04 FAQ
What is port 6118 used for?

Port 6118 is assigned by IANA to tipc (Transparent Inter Process Communication).

Is port 6118 TCP or UDP?

Port 6118 is registered for UDP.

Is it safe to open port 6118?

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 6118 is open?

On Linux run "ss -ltnup 'sport = :6118'", on macOS "lsof -nP -i :6118", and on Windows "netstat -ano | findstr :6118" to see the local process. From another machine, "nmap -p 6118 <host>" shows whether it is reachable.

05 Related
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