Port 2461 (qadmifoper)

IANA assigns port 2461 to qadmifoper.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference

qadmifoper TCP qadmifoper - -

qadmifoper UDP qadmifoper - -

Linux: is anything listening on TCP 2461?

sudo ss -tlnp 'sport = :2461'

Linux: UDP 2461

sudo ss -ulnp 'sport = :2461'

Linux / macOS: which process owns the port

sudo lsof -nP -i :2461

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':2461 '

Windows (Command Prompt)

netstat -ano | findstr :2461

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2461 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 2461

From Windows

Test-NetConnection HOST -Port 2461

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

nc -vzu -w 5 HOST 2461

ufw

sudo ufw deny 2461/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 2461 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 2461 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 2461' -Direction Inbound -Protocol TCP -LocalPort 2461 -Action Block

ufw

sudo ufw deny 2461/udp

iptables

sudo iptables -A INPUT -p udp --dport 2461 -j DROP

nftables

sudo nft add rule inet filter input udp dport 2461 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block UDP 2461' -Direction Inbound -Protocol UDP -LocalPort 2461 -Action Block

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