Inbound Traffic Blocked, Check Firewall Settings [exclusive] Site

If problems persist, check for conflicting VPNs, proxy settings, or SELinux (Linux) which can also deny network access independently of the firewall.

Get-NetFirewallRule | Where-Object $_.Direction -eq 'Inbound' -and $_.Enabled -eq 'True' | Format-Table DisplayName, Action Use with caution; only for testing.

Issue: Users or services cannot connect to your server, application, or device from an external network (e.g., the internet or another subnet). Connection attempts time out or are actively rejected. inbound traffic blocked, check firewall settings

Temporarily disable the firewall to confirm the issue (do not do this in production).

sudo iptables -L -n -v Look for a default policy of DROP or REJECT on the INPUT chain. Example blocking line: If problems persist, check for conflicting VPNs, proxy

The firewall is blocking the incoming (inbound) traffic.

# Linux / macOS sudo netstat -tulpn | grep LISTEN # or ss -tuln netstat -an | findstr "LISTENING" Connection attempts time out or are actively rejected

# Test TCP port nc -zv <target-ip> <port> telnet <target-ip> <port> Test with curl (HTTP) curl -v http://<target-ip>:<port>