vogievetsky commented on issue #8686: Router management Proxy routing should 
have a way to route to any node in the cluster
URL: 
https://github.com/apache/incubator-druid/issues/8686#issuecomment-542959319
 
 
   The proxy could only forward to Druid nodes themselves so it is not open to 
everything. Also there is already an open proxy in the sampler (http firehose). 
I tried to implement it that way and it works for non TLS clusters, (for TLS 
clusters we would need to address: 
https://github.com/apache/incubator-druid/issues/8668
   
   From a security perspective my model is that if you have admin access to the 
management proxy enabled router you can pretty much do anything anyway at that 
point.
   
   From a scalability perspective I do not think it is a problem if this is a 
user initiated action (with a warning in the UI). Also remember that it would 
be OK for this to be slow, taking a 100ms pause between every request. People 
would be fine with it as long as there is visual feedback with a ticking 
`Contacting node 12 out of 343` that shows that progress is being made.

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