ifport.io

See which TCP ports the internet can reach from where you make this request.

Run a check

Check the source path observed for this request. No target can be entered or changed.

curl -L ifport.io

ifport.io automatically redirects requests to the secure protocol.

MCP clients

Connect an MCP client to ifport.io/mcp. Setup and protocol lifecycle: MCP docs.

What the result means

ifport.io checks only the network path that made the request. That path may end at a NAT, VPN, proxy, CI runner, cloud runtime, or agent sandbox, so the result may not describe another machine. Arbitrary targets are not accepted.