When attempting to log on to the Admin site the following error is reported
原因
In IIS there is a restriction set for either an IP Address or a Domain
解决办法
Open IIS
Navigate to the PMAdmin > IIS > IP Address & Domain Restrictions
Check the entries listed for any Allow or Deny restrictions
Even if the "Mode" may state "Allow" the entry may still be configured for "Deny" so click on "Edit Feature Settings" to see what the active access entry is and change as required.