Port 3490 (colubris)

IANA assigns port 3490 to colubris: Colubris Management Port.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference

colubris TCP Colubris Management Port Gilbert Moineau -

colubris UDP Colubris Management Port Gilbert Moineau -

Registry dates for this port: registered 2002-05.

Linux: is anything listening on TCP 3490?

sudo ss -tlnp 'sport = :3490'

Linux: UDP 3490

sudo ss -ulnp 'sport = :3490'

Linux / macOS: which process owns the port

sudo lsof -nP -i :3490

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':3490 '

Windows (Command Prompt)

netstat -ano | findstr :3490

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3490 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 3490

From Windows

Test-NetConnection HOST -Port 3490

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

nc -vzu -w 5 HOST 3490

ufw

sudo ufw deny 3490/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 3490 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 3490 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 3490' -Direction Inbound -Protocol TCP -LocalPort 3490 -Action Block

ufw

sudo ufw deny 3490/udp

iptables

sudo iptables -A INPUT -p udp --dport 3490 -j DROP

nftables

sudo nft add rule inet filter input udp dport 3490 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block UDP 3490' -Direction Inbound -Protocol UDP -LocalPort 3490 -Action Block

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