Port 34962 (profinet-rt)

IANA assigns port 34962 to profinet-rt: PROFInet RT Unicast.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference

profinet-rt TCP PROFInet RT Unicast PNO PROFIBUS Nutzerorganisation e.V. -

profinet-rt UDP PROFInet RT Unicast PNO PROFIBUS Nutzerorganisation e.V. -

Registry dates for this port: registered 2004-11, last modified 2026-03-16.

Linux: is anything listening on TCP 34962?

sudo ss -tlnp 'sport = :34962'

Linux: UDP 34962

sudo ss -ulnp 'sport = :34962'

Linux / macOS: which process owns the port

sudo lsof -nP -i :34962

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':34962 '

Windows (Command Prompt)

netstat -ano | findstr :34962

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 34962 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 34962

From Windows

Test-NetConnection HOST -Port 34962

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

nc -vzu -w 5 HOST 34962

ufw

sudo ufw deny 34962/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 34962 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 34962 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 34962' -Direction Inbound -Protocol TCP -LocalPort 34962 -Action Block

ufw

sudo ufw deny 34962/udp

iptables

sudo iptables -A INPUT -p udp --dport 34962 -j DROP

nftables

sudo nft add rule inet filter input udp dport 34962 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block UDP 34962' -Direction Inbound -Protocol UDP -LocalPort 34962 -Action Block

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