So I had this same problem with WSUS and it turned out that IIS 8.5 was not binding to my ipv4 ip address, but was binding to ipv6 address. when I accessed it via localhost:8580 it would translate it to the ipv6 localhost address, and thus would work. Accessing it via ip was a no go. I had to manually bind the address using netsh, then it worked right away. bloody annoying.
Steps:
- Open command prompt as administrator
- Type the following:
netsh http add iplisten ipaddress (IPADDRESSOFYOURSERVER)
that’s it. You should get:
IP address successfully added
I found the commands here
https://serverfault.com/questions/123796/get-iis-7-5-to-listen-on-ipv6