Shredstream Firewall Setup

Expose and verify the UDP port used by your Shredstream destination.

Required network path

NoLimitNodes sends packets directly to the IPv4 address and UDP port that you register. The address must be a public IPv4 that you control.

NoLimitNodes gateway → public IPv4:UDP port → firewall or NAT → receiver socket

Host firewall example

Choose the command that matches your system. Replace 20000 with your port.

UFWbash

sudo ufw allow 20000/udp

firewalldbash

sudo firewall-cmd --permanent --add-port=20000/udpsudo firewall-cmd --reload

Cloud firewall

Create an inbound UDP rule for the configured port. V1 does not publish a fixed NoLimitNodes source-IP allowlist, so do not create a rule that depends on one.

Verify receipt

Start packet capture before saving the destination. The first packet is a short SHREDCAST-VERIFY <id> <token> packet whose token must be pasted into the node details screen.

sudo tcpdump -n -i any "udp and dst port 20000"

If packet capture sees traffic but the application does not, check the bind address, container port mapping, socket buffer, and process permissions. If packet capture sees nothing, check the dashboard status, public route, security group, firewall, and NAT mapping.