- Close the port if nothing on the host needs it.
- Identify the process that listens on it (commands below) before opening it in a firewall.
- Expose a service only to the networks that use it.
Port 42999: API endpoint for search application
Port 42999 is assigned by IANA to curiosity (API endpoint for search application).
42999
How curiosity works
Other servicesThe client sends a request to port 42999 and the curiosity service answers.
- Transport
- TCP
- Exposure risk
- not rated depends on the program listening
- Encryption
- Unknownnot stated by the registry
- IANA status
- Assigned1 registered service
- Range
- Registered (1024-49151)
- Category
- Other services
Is port 42999 dangerous?
We have no specific security note for port 42999. Its risk depends on the program actually listening on it. General advice for other services services:
IANA registry entries for port 42999
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| curiosity | 42999 | TCP | API endpoint for search application | - | 2022-12-09 |
| - | 42999 | - | Reserved | - | - |
// source: IANA service name and port number registry
Which program uses port 42999, and is it reachable?
Linux
sudo ss -ltnup 'sport = :42999' # process listening on 42999
sudo lsof -nP -i :42999macOS
sudo lsof -nP -i :42999
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 42999 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 42999 netstat -ano | findstr :42999
From another machine
nmap -p 42999 -sV <host> nc -zv <host> 42999
Block it in the firewall
sudo ufw deny 42999/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 42999" -Direction Inbound -LocalPort 42999 -Protocol TCP -Action Block # Windows
What is port 42999 used for?
Port 42999 is assigned by IANA to curiosity (API endpoint for search application).
Is port 42999 TCP or UDP?
Port 42999 is registered for TCP.
Is it safe to open port 42999?
It depends on the program that listens on it. Open it only for a service you know and only to the networks that need it. Close the port if nothing on the host needs it.
How do I check if port 42999 is open?
On Linux run "ss -ltnup 'sport = :42999'", on macOS "lsof -nP -i :42999", and on Windows "netstat -ano | findstr :42999" to see the local process. From another machine, "nmap -p 42999 <host>" shows whether it is reachable.
Other other services ports
:4444 Metasploit default / krb524 tcp · udp · high risk :31337 Back Orifice / elite tcp · udp · high risk :1 TCP Port Service Multiplexer tcp · udp :5 Remote Job Entry tcp · udp :9 Discard tcp · udp · sctp · dccp :11 Active Users tcp · udp :17 Quote of the Day tcp · udp :18 Message Send Protocol (historic) tcp · udp