We are using Windows 2008 R2 and IIS7. It is a VMWare VM instance.
Recently I added a new IP to NIC. Then using the IIS manager UI to add a new IIS entry binding to ip A and port 80. The NIC have existing IP B and C.
So I tested it by change the IIS entry to ip B:443. It is working. Telnet test passed too.
Then I tested ti by change the same IIS entry to ip C:8888 (to make sure no other application is listening to the port by mistake). It is working. Telnet test passed.
So the only problem is the new IP cannot be used in my IIS7! From the IIS manager UI I cannot find any entry is listening to IP A beside the problematic entry. I search in applicationhost.config and have same result. How can I troubleshoot it?
P.S. IP A is pingable. When I remove IP A from network card it will immediately become non-pingable.