- 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 5820: AutoPass licensing
Port 5820 is assigned by IANA to autopassdaemon (AutoPass licensing).
5820
How autopassdaemon works
Other servicesThe client sends a request to port 5820 and the autopassdaemon 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 5820 dangerous?
We have no specific security note for port 5820. Its risk depends on the program actually listening on it. General advice for other services services:
IANA registry entries for port 5820
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| autopassdaemon | 5820 | TCP | AutoPass licensing | - | 2024-08-01 |
| - | 5820 | - | Reserved | - | - |
// source: IANA service name and port number registry
Which program uses port 5820, and is it reachable?
Linux
sudo ss -ltnup 'sport = :5820' # process listening on 5820
sudo lsof -nP -i :5820macOS
sudo lsof -nP -i :5820
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 5820 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 5820 netstat -ano | findstr :5820
From another machine
nmap -p 5820 -sV <host> nc -zv <host> 5820
Block it in the firewall
sudo ufw deny 5820/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 5820" -Direction Inbound -LocalPort 5820 -Protocol TCP -Action Block # Windows
What is port 5820 used for?
Port 5820 is assigned by IANA to autopassdaemon (AutoPass licensing).
Is port 5820 TCP or UDP?
Port 5820 is registered for TCP.
Is it safe to open port 5820?
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 5820 is open?
On Linux run "ss -ltnup 'sport = :5820'", on macOS "lsof -nP -i :5820", and on Windows "netstat -ano | findstr :5820" to see the local process. From another machine, "nmap -p 5820 <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