Port 28001PQ Service
TCP port 28001 is assigned to the PQ Service; no established public use is known.
- transport
- tcp
- in transit
- cleartext
- assignment
- official
- risk
- 1/10
- lookups
- 0
single transport
payload readable on path
registered with iana
safe
rank 993 of 6,497 · top 15%
also known as pqsp
1 other service is registered on port 28001. compare all 2 →
Technical Details
what runs on :28001PQ Service is registered on port :28001 over tcp to Peter Laschtowitz, assigned September 2009. 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 :28001
# linux
sudo ss -tlpn 'sport = :28001'
# macos / bsd
sudo lsof -nP -i :28001
# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :28001nmap -sV -p T:28001 <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 detailsSecurity Information
exposure of :28001risk 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 :28001 yet
known exploits, hardening advice, what a compromise looks like — suggest an edit if you know its exposure.
Related Ports
ports registered around :28001, by lookups.
| port | service | risk | |||
|---|---|---|---|---|---|
| :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 |
| :28010 | Gruber Cash Registry Protocol | TCP | — | safe | 0 |
risk mix of the 6 listed
- safe33%
- caution67%
0 of 6 encrypted