I think the original iRule is O.K. as the -glob and -regexp, as shown above, do exactly the same.
If sounds like a problem with the AAM config of sharepoint. It should not redirect to the internal IP addresses (as mentioned above).
@fillstrsoh:
1.) What is your current AAM config on both sites?
2.) Can you please add some log lines to the iRule. Then try to access sharepoint and post the logs.
log local0. "URI - [HTTP::uri]"
log local0. "URL - [HTTP::method] [HTTP::host][HTTP::uri]"
log local0. "Host: [HTTP::header Host]"
log local0. "Request: [HTTP::request]"
Regards
Kurt Knochner
Nimbostratus
