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Port 1163 (sddp)

IANA assigns port 1163 to sddp: SmartDialer Data Protocol.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
sddp TCP SmartDialer Data Protocol Lee Griffiths -
sddp UDP SmartDialer Data Protocol Lee Griffiths -

Registry dates for this port: registered 2004-11.

Check what is listening on port 1163

Linux: is anything listening on TCP 1163?
sudo ss -tlnp 'sport = :1163'
Linux: UDP 1163
sudo ss -ulnp 'sport = :1163'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1163
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1163 '
Windows (Command Prompt)
netstat -ano | findstr :1163
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1163 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1163
From Windows
Test-NetConnection HOST -Port 1163
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1163

Block port 1163 in the firewall

ufw
sudo ufw deny 1163/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1163 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1163 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1163' -Direction Inbound -Protocol TCP -LocalPort 1163 -Action Block
ufw
sudo ufw deny 1163/udp
iptables
sudo iptables -A INPUT -p udp --dport 1163 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1163 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1163' -Direction Inbound -Protocol UDP -LocalPort 1163 -Action Block

Related ports

1161health-polling1162health-trap1164qsm-proxy1165qsm-gui

All port numbers · Open port checker
Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.