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// Other services

Port 30999: OpenView Service Desk Client

Port 30999 is assigned by IANA to ovobs (OpenView Service Desk Client).

30999

How ovobs works

Other services
client:30999ovobsresponse client:30999ovobsresponse

The client sends a request to port 30999 and the ovobs service answers.

Transport
TCP · UDP
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
01 Security

Is port 30999 dangerous?

We have no specific security note for port 30999. Its risk depends on the program actually listening on it. General advice for other services services:

  • 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.
02 Registry

IANA registry entries for port 30999

ServicePortTransportDescriptionReferenceUpdated
ovobs 30999 TCP, UDP OpenView Service Desk Client - 2006-05

// source: IANA service name and port number registry

03 Check it

Which program uses port 30999, and is it reachable?

Linux

sudo ss -ltnup 'sport = :30999'      # process listening on 30999
sudo lsof -nP -i :30999

macOS

sudo lsof -nP -i :30999

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 30999 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 30999
netstat -ano | findstr :30999

From another machine

nmap -p 30999 -sV <host>
sudo nmap -sU -p 30999 <host>
nc -zv <host> 30999

Block it in the firewall

sudo ufw deny 30999/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 30999" -Direction Inbound -LocalPort 30999 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 30999 used for?

Port 30999 is assigned by IANA to ovobs (OpenView Service Desk Client).

Is port 30999 TCP or UDP?

Port 30999 is registered for TCP and UDP.

Is it safe to open port 30999?

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 30999 is open?

On Linux run "ss -ltnup 'sport = :30999'", on macOS "lsof -nP -i :30999", and on Windows "netstat -ano | findstr :30999" to see the local process. From another machine, "nmap -p 30999 <host>" shows whether it is reachable.

05 Related
: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

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