Port 21845webphone
TCP/UDP 21845 is registered as webphone to Toby Hosterman; no established public deployment is known.
- transport
- tcp · udp
- in transit
- cleartext
- assignment
- official
- risk
- 1/10
- lookups
- 0
2 transports registered
payload readable on path
registered with iana
safe
rank 993 of 6,404 · top 15%
Technical Details
what runs on :21845webphone is registered on port :21845 over tcp and udp to Toby Hosterman. 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 :21845
# linux
sudo ss -tulpn 'sport = :21845'
# macos / bsd
sudo lsof -nP -i :21845
# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :21845nmap -sV -p T:21845 <host>
sudo nmap -sU -sV -p U:21845 <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 :21845risk 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 · udp
udp is connectionless — source addresses are trivially spoofed and it is a reflection favourite
security overview
no security notes recorded for :21845 yet
known exploits, hardening advice, what a compromise looks like — suggest an edit if you know its exposure.
Related Ports
ports registered around :21845, by lookups.
| port | service | risk | |||
|---|---|---|---|---|---|
| :21800 | TVNC Pro Multiplexing | TCPUDP | — | safe | 0 |
| :21847 | NetSpeak Corp. Connection Services | TCPUDP | — | safe | 0 |
| :21801 | Safe AutoLogon | TCP | — | safe | 0 |
risk mix of the 3 listed
- safe100%
0 of 3 encrypted