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Port 8611 (canon-bjnp1)

IANA assigns port 8611 to canon-bjnp1: Canon BJNP Port 1.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
canon-bjnp1 TCP Canon BJNP Port 1 Atsushi Nakamura -
canon-bjnp1 UDP Canon BJNP Port 1 Atsushi Nakamura -

Registry dates for this port: registered 2003-11.

Check what is listening on port 8611

Linux: is anything listening on TCP 8611?
sudo ss -tlnp 'sport = :8611'
Linux: UDP 8611
sudo ss -ulnp 'sport = :8611'
Linux / macOS: which process owns the port
sudo lsof -nP -i :8611
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':8611 '
Windows (Command Prompt)
netstat -ano | findstr :8611
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 8611 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 8611
From Windows
Test-NetConnection HOST -Port 8611
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 8611

Block port 8611 in the firewall

ufw
sudo ufw deny 8611/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 8611 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 8611 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 8611' -Direction Inbound -Protocol TCP -LocalPort 8611 -Action Block
ufw
sudo ufw deny 8611/udp
iptables
sudo iptables -A INPUT -p udp --dport 8611 -j DROP
nftables
sudo nft add rule inet filter input udp dport 8611 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 8611' -Direction Inbound -Protocol UDP -LocalPort 8611 -Action Block

Related ports

8609canon-cpp-disc8610canon-mfnp8612canon-bjnp28613canon-bjnp3

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