Port 671VACDSM-APP
VACDSM-APP is the IANA-assigned service name for TCP/UDP port 671; no public implementation or common deployment is recorded.
- 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 5,330 · top 19%
Technical Details
what runs on :671VACDSM-APP is registered on port :671 over tcp and udp. 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 :671
# linux
sudo ss -tulpn 'sport = :671'
# macos / bsd
sudo lsof -nP -i :671
# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :671nmap -sV -p T:671 <host>
sudo nmap -sU -sV -p U:671 <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 :671risk 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 :671 yet
known exploits, hardening advice, what a compromise looks like — suggest an edit if you know its exposure.
Related Ports
ports registered around :671, by lookups.
| port | service | risk | |||
|---|---|---|---|---|---|
| :660 | Mac OS X Server Admin | TCP | Remote Access | caution | 23.7k |
| :623 | ASF-RMCP | UDP | Remote Access | caution | 20.5k |
| :636 | LDAPS | TCPUDPtls | Security | caution | 15.6k |
| :712 | TBRPF Protocol | TCP | Network Services | caution | 15.0k |
| :695 | IEEE-MMS-SSL | TCPtls | Security | caution | 14.3k |
| :639 | MSDP | TCPUDP | Network Services | caution | 11.4k |
| :647 | DHCP Failover | TCP | Network Services | caution | 11.1k |
| :654 | Media Management Protocol | TCP | Network Services | caution | 10.2k |
risk mix of the 8 listed
- caution100%
2 of 8 encrypted