- 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.
Port 6440: heliosd daemon
Port 6440 is assigned by IANA to heliosd (heliosd daemon).
6440
How heliosd works
Other servicesThe client sends a request to port 6440 and the heliosd 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
Is port 6440 dangerous?
We have no specific security note for port 6440. Its risk depends on the program actually listening on it. General advice for other services services:
IANA registry entries for port 6440
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| heliosd | 6440 | TCP | heliosd daemon | - | 2020-02-28 |
| - | 6440 | - | Reserved | - | - |
// source: IANA service name and port number registry
Which program uses port 6440, and is it reachable?
Linux
sudo ss -ltnup 'sport = :6440' # process listening on 6440
sudo lsof -nP -i :6440macOS
sudo lsof -nP -i :6440
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 6440 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 6440 netstat -ano | findstr :6440
From another machine
nmap -p 6440 -sV <host> nc -zv <host> 6440
Block it in the firewall
sudo ufw deny 6440/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 6440" -Direction Inbound -LocalPort 6440 -Protocol TCP -Action Block # Windows
What is port 6440 used for?
Port 6440 is assigned by IANA to heliosd (heliosd daemon).
Is port 6440 TCP or UDP?
Port 6440 is registered for TCP.
Is it safe to open port 6440?
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 6440 is open?
On Linux run "ss -ltnup 'sport = :6440'", on macOS "lsof -nP -i :6440", and on Windows "netstat -ano | findstr :6440" to see the local process. From another machine, "nmap -p 6440 <host>" shows whether it is reachable.
Other other services ports
:4444 Metasploit default / krb524 tcp · udp · high risk :31337 Back Orifice / elite tcp · udp · high risk :1 TCP Port Service Multiplexer tcp · udp :5 Remote Job Entry tcp · udp :9 Discard tcp · udp · sctp · dccp :11 Active Users tcp · udp :17 Quote of the Day tcp · udp :18 Message Send Protocol (historic) tcp · udp