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Port 184 (ocserver)

IANA assigns port 184 to ocserver: OCServer.

Well-known (system) port, 0-1023 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
ocserver TCP OCServer Jerrilynn Okamura -
ocserver UDP OCServer Jerrilynn Okamura -

Check what is listening on port 184

Linux: is anything listening on TCP 184?
sudo ss -tlnp 'sport = :184'
Linux: UDP 184
sudo ss -ulnp 'sport = :184'
Linux / macOS: which process owns the port
sudo lsof -nP -i :184
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':184 '
Windows (Command Prompt)
netstat -ano | findstr :184
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 184 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 184
From Windows
Test-NetConnection HOST -Port 184
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 184

Block port 184 in the firewall

ufw
sudo ufw deny 184/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 184 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 184 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 184' -Direction Inbound -Protocol TCP -LocalPort 184 -Action Block
ufw
sudo ufw deny 184/udp
iptables
sudo iptables -A INPUT -p udp --dport 184 -j DROP
nftables
sudo nft add rule inet filter input udp dport 184 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 184' -Direction Inbound -Protocol UDP -LocalPort 184 -Action Block

Related ports

182audit183ocbinder185remote-kis186kis

All port numbers · Open port checker
Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.