Server names¶
Hypercorn can be configured to only respond to requests that have a
recognised host header value by adding the recognised hosts to the
server_names configuration variable. Any requests that have a host
value not in this list will be responded to with a 404.
DNS rebinding attacks¶
Setting the server_names configuration variable helps mitigate
[DNS rebinding attacks](https://en.wikipedia.org/wiki/DNS_rebinding)
and hence is recommended.