connection data
HostnameLookups on
- A DNS lookup is done for all incoming connections.
- You can drop this for very heavily loaded services.
- It is required for hostname-based access control.
IdentityCheck on
- Causes an
ident
lookup for every connection.
- Don't use this with very heavily loaded servers.
- Beware caches.
- You can start with it on for simple servers and then review the decision.