Publicly hosting parity rpc - Provided Host header is not whitelisted

Question

I setup an ubuntu test server in the cloud with parity installed. My desire is to publicly expose the parity RPC service on port 8545 for testing purposes. Currently, I am ignoring whether this is safe or not.

The parity config.toml file is shown below. When I navigate to xxx.xxx.xxx.xxx:8545 in the browser I see the following message:

Provided Host header is not whitelisted.

I was expecting instead to see Used HTTP Method is not allowed. POST or OPTIONS is required. As a sanity check if I turn parity off I get a page not found error.

config.toml

[rpc]
    # Allows Cross-Origin Requests from domain '*'.
    interface = "all"
    cors = "*"
    # Allow connections only using specified addresses.
    hosts = ["", "*"]

Related:

• Curl error
• Is it safe to do this?

Answer 1

The solution was to run parity with the following option.

parity --jsonrpc-hosts "all"

This was alluded to here.