- 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 28010: Gruber cash registry protocol
Port 28010 is assigned by IANA to gruber-cashreg (Gruber cash registry protocol).
28010
How gruber-cashreg works
Other servicesThe client sends a request to port 28010 and the gruber-cashreg 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 28010 dangerous?
We have no specific security note for port 28010. Its risk depends on the program actually listening on it. General advice for other services services:
IANA registry entries for port 28010
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| gruber-cashreg | 28010 | TCP | Gruber cash registry protocol | - | 2019-12-31 |
| - | 28010 | - | Reserved | - | - |
// source: IANA service name and port number registry
Which program uses port 28010, and is it reachable?
Linux
sudo ss -ltnup 'sport = :28010' # process listening on 28010
sudo lsof -nP -i :28010macOS
sudo lsof -nP -i :28010
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 28010 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 28010 netstat -ano | findstr :28010
From another machine
nmap -p 28010 -sV <host> nc -zv <host> 28010
Block it in the firewall
sudo ufw deny 28010/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 28010" -Direction Inbound -LocalPort 28010 -Protocol TCP -Action Block # Windows
What is port 28010 used for?
Port 28010 is assigned by IANA to gruber-cashreg (Gruber cash registry protocol).
Is port 28010 TCP or UDP?
Port 28010 is registered for TCP.
Is it safe to open port 28010?
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 28010 is open?
On Linux run "ss -ltnup 'sport = :28010'", on macOS "lsof -nP -i :28010", and on Windows "netstat -ano | findstr :28010" to see the local process. From another machine, "nmap -p 28010 <host>" shows whether it is reachable.
Other other services ports
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