Port 6486 (sun-sr-iiops)

IANA assigns port 6486 to sun-sr-iiops: Service Registry Default IIOPS Domain.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference

sun-sr-iiops TCP Service Registry Default IIOPS Domain Paul Sterk -

sun-sr-iiops UDP Service Registry Default IIOPS Domain Paul Sterk -

Registry dates for this port: registered 2006-03.

Linux: is anything listening on TCP 6486?

sudo ss -tlnp 'sport = :6486'

Linux: UDP 6486

sudo ss -ulnp 'sport = :6486'

Linux / macOS: which process owns the port

sudo lsof -nP -i :6486

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':6486 '

Windows (Command Prompt)

netstat -ano | findstr :6486

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 6486 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 6486

From Windows

Test-NetConnection HOST -Port 6486

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

nc -vzu -w 5 HOST 6486

ufw

sudo ufw deny 6486/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 6486 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 6486 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 6486' -Direction Inbound -Protocol TCP -LocalPort 6486 -Action Block

ufw

sudo ufw deny 6486/udp

iptables

sudo iptables -A INPUT -p udp --dport 6486 -j DROP

nftables

sudo nft add rule inet filter input udp dport 6486 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block UDP 6486' -Direction Inbound -Protocol UDP -LocalPort 6486 -Action Block

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