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README
captivednsd ----------- captivednsd, the Captive Domain Name Server, returns same authorative response to every query. The reponse to 'A' queries and 'PTR' records are passed as a parameter on the command line. The code is covered by the GNU license. I wrote the daemon to direct people to a captive web portal, on a system that was not connected to the Internet. This meant that it was not possible to resolve the correct IP address for a host and then redirect the query using a firewall. captivednsd is based on the source code of scdns and Busybox's dnsd: http://www.oao.no/filer/scdns-25.tgz http://www.busybox.net/cgi-bin/viewcvs.cgi/trunk/busybox/networking/dnsd.c Usage ----- captivednsd [options] <ip> <host> -t <ttl> Set the TTL for DNS responses (default 30). -p <port> Port number to listen on (default 53). -b <addr> Bind to an IP address (default 0.0.0.0). Example ------- captivednsd 10.0.0.1 portal.local. All A requests will return IP address 10.0.0.1. All PTR requests will return portal.local. Todo ---- - Hard coded support for resolving the IP of localhost - Support reading static hosts from /etc/hosts - IPv6 Support
