There's no encryption and handshaking needed. (I think that'll change soon.)
You could use the script
Code:
javascript:document.write('rtmpdump --rtmp "'+srvE+'/'+streamID+'" --flv "'+streamID+'_'+Number(new Date()/1000).toFixed(0)+'.flv"')
to let your browser generate the rtmpdump line.
It seems, that every stream is available from every server. So the call
Code:
rtmpdump --rtmp "rtmp://176.31.238.202/liveedge/[username]" --flv "[output].flv"
with fixed ip should work for you, too. (But I don't know if the ip changes, so use the Javascript.)