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Port 2809 (corbaloc)

IANA assigns port 2809 to corbaloc: CORBA LOC.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
corbaloc TCP CORBA LOC Ted McFadden -
corbaloc UDP CORBA LOC Ted McFadden -

Check what is listening on port 2809

Linux: is anything listening on TCP 2809?
sudo ss -tlnp 'sport = :2809'
Linux: UDP 2809
sudo ss -ulnp 'sport = :2809'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2809
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2809 '
Windows (Command Prompt)
netstat -ano | findstr :2809
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2809 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2809
From Windows
Test-NetConnection HOST -Port 2809
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2809

Block port 2809 in the firewall

ufw
sudo ufw deny 2809/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2809 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2809 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2809' -Direction Inbound -Protocol TCP -LocalPort 2809 -Action Block
ufw
sudo ufw deny 2809/udp
iptables
sudo iptables -A INPUT -p udp --dport 2809 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2809 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2809' -Direction Inbound -Protocol UDP -LocalPort 2809 -Action Block

Related ports

2807cspmulti2808j-lan-p2810netsteward2811gsiftp

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Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.