CyberHunter
Local dataset, no network
// Network services

Port 2009:

Port 2009 is assigned by IANA to news (), whosockami ().

2009

How news works

Network services
client:2009newsresponse client:2009newsresponse

The client sends a request to port 2009 and the news service answers.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned2 registered services
Range
Registered (1024-49151)
Category
Network services
01 Security

Is port 2009 dangerous?

We have no specific security note for port 2009. Its risk depends on the program actually listening on it. General advice for network services services:

  • Answer only the networks that need the service (no open resolvers, relays or reflectors).
  • UDP services can be abused for DDoS amplification: rate-limit or block them at the edge.
  • Disable legacy test services that have no use in production.
02 Registry

IANA registry entries for port 2009

ServicePortTransportDescriptionReferenceUpdated
news 2009 TCP - -
whosockami 2009 UDP - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2009, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2009'      # process listening on 2009
sudo lsof -nP -i :2009

macOS

sudo lsof -nP -i :2009

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2009 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2009
netstat -ano | findstr :2009

From another machine

nmap -p 2009 -sV <host>
sudo nmap -sU -p 2009 <host>
nc -zv <host> 2009

Block it in the firewall

sudo ufw deny 2009/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2009" -Direction Inbound -LocalPort 2009 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2009 used for?

Port 2009 is assigned by IANA to news (), whosockami ().

Is port 2009 TCP or UDP?

Port 2009 is registered for TCP and UDP.

Is it safe to open port 2009?

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. Answer only the networks that need the service (no open resolvers, relays or reflectors).

How do I check if port 2009 is open?

On Linux run "ss -ltnup 'sport = :2009'", on macOS "lsof -nP -i :2009", and on Windows "netstat -ano | findstr :2009" to see the local process. From another machine, "nmap -p 2009 <host>" shows whether it is reachable.

05 Related
:53 DNS tcp · udp · moderate risk :135 MS RPC tcp · udp · high risk :123 NTP udp · tcp · moderate risk :67 DHCP server udp · tcp · moderate risk :111 rpcbind tcp · udp · high risk :9100 Raw printing (JetDirect) tcp · udp · high risk :631 IPP / CUPS tcp · udp · high risk :5353 mDNS udp · tcp · moderate risk

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