Forum Discussion

virtanet's avatar
virtanet
Copper Contributor
Sep 24, 2019

Why do Office365 Network Connectivity Principles include IPs & URLs?

I'm trying to understand why Office365 Network Connectivity Principles include IPs & URLs?    Typically when the branch edge network device / dns resolver make a query for the office URL the aDNS s...
PaulAndrew's avatar
PaulAndrew
Icon for Microsoft rankMicrosoft
Oct 08, 2019

virtanet no, please don't cache these outside of a DNS server. The IP Addresses are published for large enterprise customers who require these for perimeter network firewalls. This could be in order to bypass proxy server processing for Office 365 network connectivity and to send traffic directly to an egress firewall therefor improving performance.

 

Regards,

Paul

  • virtanet's avatar
    virtanet
    Copper Contributor
    Oct 10, 2019
    Makes sense, thanks for the reply Paul