Symptoms
What K2 Ports that need to be opened for Users to use form and participate in workflow?
Diagnoses
In order for an end user to open/enter/submit information and participate in workflow, what Ports to the server need to be open?
Resolution
Usually, an end user will just need ports opened to the forms that is served by the web server. Regular web server ports are:
HTTP: TCP 80
HTTPS: TCP 443
But can include any non-standard ports that you have configured for you web applications (81, 82, 8080, 444, etc.) For more information regarding interactions between the services on the servers, please see:
http://help.k2.com/kb001318
A typical path of interaction is:
Client Machine Browser <---> Sharepoint/Smartform web server <---> K2 Server <---> SQL, Exchange, SAP, AD, and other back-ends