Port 996vsinet
The vsinet service is assigned to TCP and UDP port 996, but its protocol purpose is not documented.
- 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 4,578 · top 22%
Technical Details
what runs on :996vsinet is registered on port :996 over tcp and udp to Rob Juergens. 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 found open very commonly. What's listening is often not the registered service, so check before you assume.
find what's listening on :996
# linux
sudo ss -tulpn 'sport = :996'
# macos / bsd
sudo lsof -nP -i :996
# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :996nmap -sV -p T:996 <host>
sudo nmap -sU -sV -p U:996 <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 :996risk 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 :996 yet
known exploits, hardening advice, what a compromise looks like — suggest an edit if you know its exposure.
Related Ports
ports registered around :996, by lookups.
| port | service | risk | |||
|---|---|---|---|---|---|
| :981 | Check Point Embedded HTTPS Management | TCPtls | Security | caution | 28.5k |
| :992 | Telnet over TLS/SSL | TCPUDPtls | Security | caution | 23.5k |
| :989 | FTPS Data | TCPUDPtls | Security | caution | 22.5k |
| :990 | FTPS Control | TCPUDPtls | Security | caution | 21.8k |
| :995 | POP3S | TCPtls | caution | 18.8k | |
| :991 | Netnews Administration System | TCPUDP | Network Services | caution | 17.9k |
| :953 | DNS RNDC | TCPUDP | Security | safe | 16.4k |
| :1059 | IBM AIX NIM | TCPUDP | Network Services | caution | 15.6k |
risk mix of the 8 listed
- safe13%
- caution88%
5 of 8 encrypted