Whats the correct syntax for MFA Trusted IP (subnet mask .252)

Jenny Council 25 Reputation points

If I've been issued 2 IPs by ISP (static IP & Gateway), and subnet mask is .252 would the syntax be [staticIP]/30 (ie 30 because of 252 subnet?) Do I also need to add gateway IP as trusted?

Microsoft Entra ID
Microsoft Entra ID
A Microsoft Entra identity service that provides identity management and access control capabilities. Replaces Azure Active Directory.
19,822 questions
0 comments No comments
{count} votes

Accepted answer
  1. TP 78,976 Reputation points


    In your example you only have 1 public IP address that you are authenticating from (that you want to be trusted), so you would use [staticIP]/32. You aren't connecting from your gateway IP address, which is why I said you only have 1 public IP.

    For example, let's say your public IP address is You would enter

    If the above was useful, please click Accept Answer.



    1 person found this answer helpful.

0 additional answers

Sort by: Most helpful