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Port 3133 (prism-deploy)

IANA assigns port 3133 to prism-deploy: Prism Deploy User Port.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
prism-deploy TCP Prism Deploy User Port Joan Linck -
prism-deploy UDP Prism Deploy User Port Joan Linck -

Check what is listening on port 3133

Linux: is anything listening on TCP 3133?
sudo ss -tlnp 'sport = :3133'
Linux: UDP 3133
sudo ss -ulnp 'sport = :3133'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3133
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3133 '
Windows (Command Prompt)
netstat -ano | findstr :3133
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3133 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3133
From Windows
Test-NetConnection HOST -Port 3133
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3133

Block port 3133 in the firewall

ufw
sudo ufw deny 3133/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3133 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3133 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3133' -Direction Inbound -Protocol TCP -LocalPort 3133 -Action Block
ufw
sudo ufw deny 3133/udp
iptables
sudo iptables -A INPUT -p udp --dport 3133 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3133 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3133' -Direction Inbound -Protocol UDP -LocalPort 3133 -Action Block

Related ports

3131netbookmark3132ms-rule-engine3134ecp3135peerbook-port

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