Port 20810CRTech NLM
TCP/20810 is assigned to CRTech NLM, a Cullimore and Ring Technologies service with no established public protocol description.
- 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 6,404 · top 15%
Technical Details
what runs on :20810CRTech NLM is registered on port :20810 over tcp to Cullimore And Ring Technologies, assigned June 2021. 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 :20810
# linux
sudo ss -tlpn 'sport = :20810'
# macos / bsd
sudo lsof -nP -i :20810
# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :20810nmap -sV -p T:20810 <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 :20810risk 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 :20810 yet
known exploits, hardening advice, what a compromise looks like — suggest an edit if you know its exposure.
Related Ports
no neighbours mapped to :20810 yet
ports are related through the categories they share — file this one under a category and its neighbours appear here.