user30017: following the instructions in the alpha-README.md file on GitHub
in step number 2, to start alphad it is suggested to do:
./alphad -rpcuser=$RPC_USER -rpcpassword=$RPC_PASS -testnet -rpcconnect=127.0.0.1 -rpcconnectport=18332 -tracksidechain=all -txindex -blindtrust=true -daemon

my question is about the rpcconnectport=18332
why 18332 instead of 4241?  like in step 5

user208: Because in order to validate sidechain transfers, alphad needs to connect to a testnet bitcoind. The rpcconnect-like flags passed to it are information about how it can do that, so you need to use the running bitcoind's port.

30017: <p>following the instructions in the <a href="https://github.com/ElementsProject/elements/blob/alpha/alpha-README.md" rel="nofollow">alpha-README.md</a> file on <a href="https://github.com/ElementsProject/elements" rel="nofollow">GitHub</a><br>
in step number 2, to start alphad it is suggested to do:</p>

<pre><code>./alphad -rpcuser=$RPC_USER -rpcpassword=$RPC_PASS -testnet -rpcconnect=127.0.0.1 -rpcconnectport=18332 -tracksidechain=all -txindex -blindtrust=true -daemon
</code></pre>

<p>my question is about the rpcconnectport=18332<br>
<strong>why 18332 instead of 4241?</strong>  like in step 5</p>
 208: <p>Because in order to validate sidechain transfers, <code>alphad</code> needs to connect to a testnet <code>bitcoind</code>. The rpcconnect-like flags passed to it are information about how it can do that, so you need to use the running <code>bitcoind</code>'s port.</p>
