Port 17423Com NSD
Port 1742 is assigned to the 3Com-nsd service over TCP and UDP.
- 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 5,526 · top 18%
Technical Details
what runs on :17423Com NSD is registered on port :1742 over tcp and udp to Nitza Steinberg. 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 :1742
# linux
sudo ss -tulpn 'sport = :1742'
# macos / bsd
sudo lsof -nP -i :1742
# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :1742nmap -sV -p T:1742 <host>
sudo nmap -sU -sV -p U:1742 <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 :1742risk 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 :1742 yet
known exploits, hardening advice, what a compromise looks like — suggest an edit if you know its exposure.
Related Ports
ports registered around :1742, by lookups.
| port | service | risk | |||
|---|---|---|---|---|---|
| :1720 | H.323 Signaling | TCP | Network Services | caution | 26.5k |
| :1701 | L2TP & L2F | UDP | Security | caution | 15.1k |
| :1755 | Microsoft Media Services | TCPUDP | Streaming | caution | 13.8k |
| :1716 | America's Army MMO | TCP | Network Services | caution | 12.6k |
| :1723 | PPTP | TCPUDP | Security | caution | 11.3k |
| :1719 | H.323 RAS | UDP | Network Services | caution | 9.2k |
| :1801 | MSMQ | TCPUDP | Network Services | caution | 8.9k |
| :1725 | Valve Steam | UDP | Gaming | caution | 7.3k |
risk mix of the 8 listed
- caution100%
0 of 8 encrypted