It's been a while since I've looked at this but on the Indigo 6.1.x Start Local Server view, I see:
Override Web server (HTTP) port number: (default 8176) (unchecked)
and down below I see:
Enable remote Indigo client access (checked)
Override Indigo Server port number: (default 1176) (unchecked)
I've been trying to connect Indigo Touch to 1176 with no luck.....
Just FYI from a user perspective, the 8176 option sounds like it's just for control pages, or maybe to access Indigo's own web server from a browser.
As far as I know, Indigo Touch is an Indigo client just as much as the client install on my desktop iMac is which makes me think to use 1176.