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SKadish's avatar
SKadish
Brass Contributor
Jan 24, 2024
Solved

Custom IP address ranges in Defender for Cloud Apps

Is there any reason that the IP Address Ranges screen in for settings Cloud Apps won't allow a /29 range?  It only allows /8, /16, /24, and /32.  What's the rationale?

7 Replies

    • SKadish's avatar
      SKadish
      Brass Contributor
      Feb 20, 2024
      I see that. Thanks! I appreciate you letting us all know.
  • Ryan0112's avatar
    Ryan0112
    Copper Contributor
    Jan 28, 2024

    SKadish - I'm also seeing the same in multiple M365 Tenants. Attempted to add a /23 which shows "IP address is not valid". Last time I was able to do this was via the classic defender for cloud apps GUI but since the re-direct this portal is unavailable.

    • SKadish's avatar
      SKadish
      Brass Contributor
      Jan 29, 2024
      I opened a ticket about this, and support confirmed the behavior. It seems like it will need to be re-engineered, so let's hope that doesn't take too long.

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