Hi, I wonder anyone else got this problem: for several months we got layer 7 traffic blocked from China, Russia and Andorra - destinations from we got most attacks registered.
For about 2 weeks our MS Office 365 applications started not to respond, hang, not refresh. MS Support engineers cannot recognize the problem. I can see all web applications wait endlessly for java scripts from modernb.akamai.odsp.cdn.office.net
Tracert seems to work fine as I can check only heartbeat responses from web servers but cannot check what does not work deeper.
So, I removed first China then Andorra from the filtering. No change. I removed Russia and.. voila!
Is anybody able to explain how is it possible the MS cloud started to work only with Russia located switches? Is our data from UE passed by MS to Russia and back???
How do you propose to bypass the Russian network still blocking traffic to and from this destination within layer 7?
Thanks in advance for any suggestions.