Port 3909SurfControl CPA
Port 3909 is assigned to SurfControl CPA, a service associated with the SurfControl product.
- 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 5,064 · top 20%
Technical Details
what runs on :3909SurfControl CPA is registered on port :3909 over tcp and udp to Hywel Morgan, assigned November 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 found open rarely. What's listening is often not the registered service, so check before you assume.
find what's listening on :3909
# linux
sudo ss -tulpn 'sport = :3909'
# macos / bsd
sudo lsof -nP -i :3909
# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :3909nmap -sV -p T:3909 <host>
sudo nmap -sU -sV -p U:3909 <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 :3909risk score
1/ 10safe
routine exposure. this port is rarely the way in on its own — keep it patched and logged and move on.
security averages 3.1 across 367 ports — this one sits 2.1 below.
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 :3909 yet
known exploits, hardening advice, what a compromise looks like — suggest an edit if you know its exposure.
Related Ports
the 8 most looked-up other ports in security — 367 ports carry that label.
| port | service | risk | |||
|---|---|---|---|---|---|
| :8881 | Atlasz Secure Server | TCP | Web Services | caution | 67.6k |
| :443 | HTTPS | TCPtls | Web Services | caution | 65.9k |
| :8291 | Winbox MikroTik Admin | TCP | Security | caution | 62.9k |
| :3268 | Microsoft Global Catalog (GC) | TCPUDP | Security | caution | 54.6k |
| :135 | Microsoft EPMAP | TCPUDP | Security | caution | 51.9k |
| :3128 | Squid Proxy HTTP | TCP | Web Services | caution | 45.8k |
| :8080 | HTTP Alternate | TCP | Web Services | caution | 44.9k |
| :7000 | Vuze HTTPS Tracker | TCPtls | Security | caution | 28.9k |
risk mix of the 8 listed
- caution100%
2 of 8 encrypted