Port 4138nettest
TCP and UDP port 4138 is assigned as nettest to David Borman; no widely deployed service is established.
- 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 5,160 · top 19%
Technical Details
what runs on :4138nettest is registered on port :4138 over tcp and udp to David Borman, assigned March 2003. 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 :4138
# linux
sudo ss -tulpn 'sport = :4138'
# macos / bsd
sudo lsof -nP -i :4138
# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :4138nmap -sV -p T:4138 <host>
sudo nmap -sU -sV -p U:4138 <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 :4138risk 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 :4138 yet
known exploits, hardening advice, what a compromise looks like — suggest an edit if you know its exposure.
Related Ports
ports registered around :4138, by lookups.
| port | service | risk | |||
|---|---|---|---|---|---|
| :4125 | Remote Web Workplace | TCP | Web Services | caution | 20.5k |
| :4096 | Ascom Timeplex BRE | TCPUDP | Network Services | safe | 16.5k |
| :4116 | Smartcard TLS | TCPUDP | Security | caution | 13.6k |
| :4100 | WatchGuard Auth Applet | Security | caution | 10.1k | |
| :4093 | PxPlus Client Server | TCPUDP | Databases | caution | 8.0k |
| :4201 | TinyMUD | TCP | Gaming | caution | 7.7k |
| :4111 | Xgrid | TCP | System | caution | 7.4k |
| :4089 | OpenCORE Remote Control | TCPUDP | Remote Access | caution | 7.4k |
risk mix of the 8 listed
- safe13%
- caution88%
0 of 8 encrypted