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Port 10008 (octopus)

IANA assigns port 10008 to octopus: Octopus Multiplexer.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
octopus TCP Octopus Multiplexer Chris Koeritz 2 -
octopus UDP Octopus Multiplexer Chris Koeritz 2 -

Registry dates for this port: registered 2002-10.

Check what is listening on port 10008

Linux: is anything listening on TCP 10008?
sudo ss -tlnp 'sport = :10008'
Linux: UDP 10008
sudo ss -ulnp 'sport = :10008'
Linux / macOS: which process owns the port
sudo lsof -nP -i :10008
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':10008 '
Windows (Command Prompt)
netstat -ano | findstr :10008
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 10008 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 10008
From Windows
Test-NetConnection HOST -Port 10008
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 10008

Block port 10008 in the firewall

ufw
sudo ufw deny 10008/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 10008 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 10008 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 10008' -Direction Inbound -Protocol TCP -LocalPort 10008 -Action Block
ufw
sudo ufw deny 10008/udp
iptables
sudo iptables -A INPUT -p udp --dport 10008 -j DROP
nftables
sudo nft add rule inet filter input udp dport 10008 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 10008' -Direction Inbound -Protocol UDP -LocalPort 10008 -Action Block

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