- 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 9979: Valley Information Systems Weather station data
Port 9979 is assigned by IANA to visweather (Valley Information Systems Weather station data).
9979
How visweather works
Other servicesThe client sends a request to port 9979 and the visweather 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 9979 dangerous?
We have no specific security note for port 9979. Its risk depends on the program actually listening on it. General advice for other services services:
IANA registry entries for port 9979
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| visweather | 9979 | TCP | Valley Information Systems Weather station data | - | 2017-05-12 |
| - | 9979 | - | Reserved | - | - |
// source: IANA service name and port number registry
Which program uses port 9979, and is it reachable?
Linux
sudo ss -ltnup 'sport = :9979' # process listening on 9979
sudo lsof -nP -i :9979macOS
sudo lsof -nP -i :9979
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 9979 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 9979 netstat -ano | findstr :9979
From another machine
nmap -p 9979 -sV <host> nc -zv <host> 9979
Block it in the firewall
sudo ufw deny 9979/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 9979" -Direction Inbound -LocalPort 9979 -Protocol TCP -Action Block # Windows
What is port 9979 used for?
Port 9979 is assigned by IANA to visweather (Valley Information Systems Weather station data).
Is port 9979 TCP or UDP?
Port 9979 is registered for TCP.
Is it safe to open port 9979?
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 9979 is open?
On Linux run "ss -ltnup 'sport = :9979'", on macOS "lsof -nP -i :9979", and on Windows "netstat -ano | findstr :9979" to see the local process. From another machine, "nmap -p 9979 <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