Port 393Meta5
Meta5 is an obscure service assignment for TCP and UDP port 393 with no documented public protocol details.
- 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 5,314 · top 19%
Technical Details
what runs on :393Meta5 is registered on port :393 over tcp and udp to Jim Kanzler. 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 :393
# linux
sudo ss -tulpn 'sport = :393'
# macos / bsd
sudo lsof -nP -i :393
# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :393nmap -sV -p T:393 <host>
sudo nmap -sU -sV -p U:393 <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 :393risk 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 :393 yet
known exploits, hardening advice, what a compromise looks like — suggest an edit if you know its exposure.
Related Ports
ports registered around :393, by lookups.
| port | service | risk | |||
|---|---|---|---|---|---|
| :443 | HTTPS | TCPtls | Web Services | caution | 65.9k |
| :445 | Microsoft-DS / SMB | TCP | File Transfer | caution | 22.3k |
| :427 | Service Location Protocol | TCPUDP | Network Services | caution | 14.6k |
| :384 | Remote Server System | TCPUDP | Remote Access | caution | 11.5k |
| :383 | HP Data Alarm Manager | TCPUDP | Network Services | caution | 11.1k |
| :369 | RPC2 Port Mapper | TCPUDP | Network Services | caution | 11.1k |
| :402 | Altiris Deployment Client | TCP | Network Services | caution | 10.2k |
| :370 | SecureCast | TCPUDP | Security | caution | 10.0k |
risk mix of the 8 listed
- caution100%
1 of 8 encrypted