`direct` inbound is a tunnel server. ### Structure ```json { "inbounds": [ { "type": "direct", "tag": "direct-in", "listen": "::", "listen_port": 5353, "tcp_fast_open": false, "sniff": false, "sniff_override_destination": false, "domain_strategy": "prefer_ipv6", "udp_timeout": 300, "network": "udp", "override_address": "1.0.0.1", "override_port": 53 } ] } ``` ### Listen Fields #### listen ==Required== Listen address. #### listen_port ==Required== Listen port. #### tcp_fast_open Enable tcp fast open for listener. #### sniff Enable sniffing. See [Sniff](/configuration/route/sniff/) for details. #### sniff_override_destination Override the connection destination address with the sniffed domain. If the domain name is invalid (like tor), this will not work. #### domain_strategy One of `prefer_ipv4` `prefer_ipv6` `ipv4_only` `ipv6_only`. If set, the requested domain name will be resolved to IP before routing. If `sniff_override_destination` is in effect, its value will be taken as a fallback. #### udp_timeout UDP NAT expiration time in seconds, default is 300 (5 minutes). ### Direct Fields #### network Listen network, one of `tcp` `udp`. Both if empty. #### override_address Override the connection destination address. #### override_port Override the connection destination port.