Port 3391Savant
Savant service traffic assigned to TCP and UDP port 3391; public protocol details are not 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 4,221 · top 24%
Technical Details
what runs on :3391Savant is registered on port :3391 over tcp and udp to Andy Bruce. 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 rarely. What's listening is often not the registered service, so check before you assume.
find what's listening on :3391
# linux
sudo ss -tulpn 'sport = :3391'
# macos / bsd
sudo lsof -nP -i :3391
# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :3391nmap -sV -p T:3391 <host>
sudo nmap -sU -sV -p U:3391 <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 :3391risk 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 :3391 yet
known exploits, hardening advice, what a compromise looks like — suggest an edit if you know its exposure.
Related Ports
ports registered around :3391, by lookups.
| port | service | risk | |||
|---|---|---|---|---|---|
| :3386 | GTP (GPRS Tunneling Protocol) | TCPUDP | Network Services | caution | 16.7k |
| :3389 | Microsoft RDP | TCPUDP | Remote Access | caution | 16.3k |
| :3424 | Xware xTrm over SSL | TCPtls | Security | caution | 13.1k |
| :3333 | Network Caller ID | TCP | Network Services | caution | 10.1k |
| :3423 | Xware xTrm Protocol | TCP | Network Services | caution | 8.7k |
| :3455 | RSVP Protocol | TCPUDP | Network Services | caution | 8.2k |
| :3412 | xmlBlaster | TCPUDP | Network Services | caution | 7.4k |
| :3396 | NDPS Printer Agent | TCPUDP | Network Services | caution | 4.6k |
risk mix of the 8 listed
- caution100%
1 of 8 encrypted