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Port 315 (dpsi)

IANA assigns port 315 to dpsi: DPSI.

Well-known (system) port, 0-1023 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
dpsi TCP DPSI Tony Scamurra -
dpsi UDP DPSI Tony Scamurra -

Check what is listening on port 315

Linux: is anything listening on TCP 315?
sudo ss -tlnp 'sport = :315'
Linux: UDP 315
sudo ss -ulnp 'sport = :315'
Linux / macOS: which process owns the port
sudo lsof -nP -i :315
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':315 '
Windows (Command Prompt)
netstat -ano | findstr :315
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 315 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 315
From Windows
Test-NetConnection HOST -Port 315
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 315

Block port 315 in the firewall

ufw
sudo ufw deny 315/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 315 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 315 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 315' -Direction Inbound -Protocol TCP -LocalPort 315 -Action Block
ufw
sudo ufw deny 315/udp
iptables
sudo iptables -A INPUT -p udp --dport 315 -j DROP
nftables
sudo nft add rule inet filter input udp dport 315 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 315' -Direction Inbound -Protocol UDP -LocalPort 315 -Action Block

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