Which one is the correct interrogative form of the below sentence:
This proxy server is an Apache-Http instance.
Is this proxy server an Apache-Http instance?
OR
Does this proxy server is an Apache-Http instance?
Which one is the correct interrogative form of the below sentence:
This proxy server is an Apache-Http instance.
Is this proxy server an Apache-Http instance?
OR
Does this proxy server is an Apache-Http instance?
The first one in your question i.e.,
Is this proxy server an Apache-Http instance?
is correct.
But the second one i.e.,
Does this proxy server is an Apache-Http instance?
is wrong because 'Do, Does, Did' is not followed by an auxiliary verb. They're always followed by the base (root) form of verbs.