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// Other services

Port 7778: Interwise

Port 7778 is assigned by IANA to interwise (Interwise).

7778

How interwise works

Other services
client:7778interwiseresponse client:7778interwiseresponse

The client sends a request to port 7778 and the interwise 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 7778 dangerous?

We have no specific security note for port 7778. 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 7778

ServicePortTransportDescriptionReferenceUpdated
interwise 7778 TCP, UDP Interwise - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 7778, and is it reachable?

Linux

sudo ss -ltnup 'sport = :7778'      # process listening on 7778
sudo lsof -nP -i :7778

macOS

sudo lsof -nP -i :7778

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 7778 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 7778
netstat -ano | findstr :7778

From another machine

nmap -p 7778 -sV <host>
sudo nmap -sU -p 7778 <host>
nc -zv <host> 7778

Block it in the firewall

sudo ufw deny 7778/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 7778" -Direction Inbound -LocalPort 7778 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 7778 used for?

Port 7778 is assigned by IANA to interwise (Interwise).

Is port 7778 TCP or UDP?

Port 7778 is registered for TCP and UDP.

Is it safe to open port 7778?

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 7778 is open?

On Linux run "ss -ltnup 'sport = :7778'", on macOS "lsof -nP -i :7778", and on Windows "netstat -ano | findstr :7778" to see the local process. From another machine, "nmap -p 7778 <host>" shows whether it is reachable.

05 Related
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