Port 28010Gruber Cash Registry Protocol

IANA assigns TCP port 28010 to the Gruber cash registry protocol from Gruber Schanksysteme.

transport: tcp
in transit: cleartext
assignment: official
risk: 1/10
lookups: 0

Technical Details

what runs on :28010

Gruber Cash Registry Protocol is registered on port :28010 over tcp to Gruber Schanksysteme, assigned December 2019. We don't have a technical write-up for it beyond the IANA registry entry.

In nmap's internet-wide scan data this port is never observed open, so if it's open on your network it's more likely a custom or misconfigured service than the registered one.

find what's listening on :28010

this machine

# linux
sudo ss -tlpn 'sport = :28010'

# macos / bsd
sudo lsof -nP -i :28010

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :28010

another host

nmap -sV -p T:28010 <host>

run it? the handshake, the implementations you meet in the wild and the flags that matter come from the engineers who do.

add technical details

Security Information

exposure of :28010

risk score

1/ 10safe

routine exposure. this port is rarely the way in on its own — keep it patched and logged and move on.

in transit

cleartext

credentials and payloads are readable by anyone on path

assignment

official

registered with iana for this service — scanners fingerprint it by number

reachable over

tcp

every listening transport is another surface to filter at the edge

security overview

no security notes recorded for :28010 yet

known exploits, hardening advice, what a compromise looks like — suggest an edit if you know its exposure.

Record

iana registry entry

port: :28010
service: Gruber Cash Registry Protocol
transport: TCP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: This assignment identifies the Gruber cash registry protocol and is registered to Gruber Schanksysteme. Its deployment and behavior are not documented here, and it has not appeared open in nmap's internet-wide scan data.
lookups: 0rank 993
added: 2026-10-19
updated: 2026-10-19
references: IANA service name registry — port 28010

Something wrong?

This record is maintained by the engineers who use port 28010. Every field on it is editable — change what's wrong, say how you know, and a reviewer publishes it, usually within a minute. Last touched 2026-10-19.

01edit any field on a page of its own
02a model checks it for accuracy and spam
03clean and confident goes live immediately

edit this record →back to the registry

Related Ports

browse categories →

ports registered around :28010, by lookups.

port	service	proto	category	risk	views
:27960	Quake III Arena & ioquake3 Games	UDP	Network Services	caution	10.2k
:28000	Bitfighter Server		Gaming	caution	6.2k
:28001	Starsiege: Tribes Server		Gaming	caution	5.9k
:27999	TW Authentication/Key Distribution	TCPUDP	Security	safe	0
:28000	NX License Manager	TCPUDP	Network Services	caution	0
:28001	PQ Service	TCP	—	safe	0

risk mix of the 6 listed

safe33%
caution67%

0 of 6 encrypted

Port :28010Gruber Cash Registry Protocol

Technical Details

Security Information

Related Ports

Port 28010Gruber Cash Registry Protocol