Port 43441 (ciscocsdb)

IANA assigns port 43441 to ciscocsdb: Cisco NetMgmt DB Ports.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference

ciscocsdb TCP Cisco NetMgmt DB Ports Cisco Systems -

ciscocsdb UDP Cisco NetMgmt DB Ports Cisco Systems -

Registry dates for this port: registered 2005-11.

Linux: is anything listening on TCP 43441?

sudo ss -tlnp 'sport = :43441'

Linux: UDP 43441

sudo ss -ulnp 'sport = :43441'

Linux / macOS: which process owns the port

sudo lsof -nP -i :43441

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':43441 '

Windows (Command Prompt)

netstat -ano | findstr :43441

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 43441 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 43441

From Windows

Test-NetConnection HOST -Port 43441

UDP probe (no reply does not prove it is closed)

nc -vzu -w 5 HOST 43441

ufw

sudo ufw deny 43441/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 43441 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 43441 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 43441' -Direction Inbound -Protocol TCP -LocalPort 43441 -Action Block

ufw

sudo ufw deny 43441/udp

iptables

sudo iptables -A INPUT -p udp --dport 43441 -j DROP

nftables

sudo nft add rule inet filter input udp dport 43441 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block UDP 43441' -Direction Inbound -Protocol UDP -LocalPort 43441 -Action Block

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