After an Azure Service App restart, one of our VPN connection into our datacenter started to fail. A simple tcpping bringing new kind of error I've never seen before
> tcpping 10.xx.xx.xx:xxxxxx
D:\home\site\wwwroot
Connection attempt failed: The requested address is not valid in its context
Connection attempt failed: The requested address is not valid in its context
Connection attempt failed: The requested address is not valid in its context
Connection attempt failed: The requested address is not valid in its context
Complete: 0/4 successfull attempts (0%). Average success time: 0ms
Usually, when the VPN is down, we are getting timeout, but not above error. After a call with Microsoft, we had confirmation that something bad happened in the underlying configuration and can't be fixed.
However, fortunately, provisionning a new instance by scaling up and then scaling down the service fixed our issue.
In our case, we switch from S1 to S2, and then came back to S1.
