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Port 1896 (b-novative-ls)

IANA assigns port 1896 to b-novative-ls: b-novative license server.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
b-novative-ls TCP b-novative license server Matthias Riese -
b-novative-ls UDP b-novative license server Matthias Riese -

Check what is listening on port 1896

Linux: is anything listening on TCP 1896?
sudo ss -tlnp 'sport = :1896'
Linux: UDP 1896
sudo ss -ulnp 'sport = :1896'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1896
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1896 '
Windows (Command Prompt)
netstat -ano | findstr :1896
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1896 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1896
From Windows
Test-NetConnection HOST -Port 1896
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1896

Block port 1896 in the firewall

ufw
sudo ufw deny 1896/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1896 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1896 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1896' -Direction Inbound -Protocol TCP -LocalPort 1896 -Action Block
ufw
sudo ufw deny 1896/udp
iptables
sudo iptables -A INPUT -p udp --dport 1896 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1896 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1896' -Direction Inbound -Protocol UDP -LocalPort 1896 -Action Block

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