• miss_access
• negative_dns_ttl
• negative_ttl
• neighbor_type_domain
• netdb_filename
• netdb_high
• netdb_low
• netdb_ping_period
• never_direct
• nonhierarchical_direct
• note
• offline_mode
• on_unsupported_protocol
• paranoid_hit_validation
• pconn_lifetime
• pconn_timeout
• peer_connect_timeout
• persistent_connection_after_error
• persistent_request_timeout
• pid_filename
• pinger_enable
• pinger_program
• pipeline_prefetch
• positive_dns_ttl
• prefer_direct
• proxy_protocol_access