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Port 9694 (client-wakeup)

IANA assigns port 9694 to client-wakeup: T-Mobile Client Wakeup Message.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
client-wakeup TCP T-Mobile Client Wakeup Message Michael Schonborn -
client-wakeup UDP T-Mobile Client Wakeup Message Michael Schonborn -

Registry dates for this port: registered 2009-09-11.

Check what is listening on port 9694

Linux: is anything listening on TCP 9694?
sudo ss -tlnp 'sport = :9694'
Linux: UDP 9694
sudo ss -ulnp 'sport = :9694'
Linux / macOS: which process owns the port
sudo lsof -nP -i :9694
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':9694 '
Windows (Command Prompt)
netstat -ano | findstr :9694
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 9694 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 9694
From Windows
Test-NetConnection HOST -Port 9694
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 9694

Block port 9694 in the firewall

ufw
sudo ufw deny 9694/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 9694 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 9694 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 9694' -Direction Inbound -Protocol TCP -LocalPort 9694 -Action Block
ufw
sudo ufw deny 9694/udp
iptables
sudo iptables -A INPUT -p udp --dport 9694 -j DROP
nftables
sudo nft add rule inet filter input udp dport 9694 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 9694' -Direction Inbound -Protocol UDP -LocalPort 9694 -Action Block

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