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Port 1965 (tivoli-npm)

IANA assigns port 1965 to tivoli-npm: Tivoli NPM.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
tivoli-npm TCP Tivoli NPM Ivana Cuozzo -
tivoli-npm UDP Tivoli NPM Ivana Cuozzo -

Check what is listening on port 1965

Linux: is anything listening on TCP 1965?
sudo ss -tlnp 'sport = :1965'
Linux: UDP 1965
sudo ss -ulnp 'sport = :1965'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1965
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1965 '
Windows (Command Prompt)
netstat -ano | findstr :1965
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1965 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1965
From Windows
Test-NetConnection HOST -Port 1965
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1965

Block port 1965 in the firewall

ufw
sudo ufw deny 1965/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1965 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1965 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1965' -Direction Inbound -Protocol TCP -LocalPort 1965 -Action Block
ufw
sudo ufw deny 1965/udp
iptables
sudo iptables -A INPUT -p udp --dport 1965 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1965 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1965' -Direction Inbound -Protocol UDP -LocalPort 1965 -Action Block

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