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资源说明：Unicast DNS to multicast DNS proxy
mdns-proxy ========== mdns-proxy is a DNS proxy that accepts DNS queries and proxies them to Avahi for a multicast DNS lookup. Description ----------- When you're on a LAN, multicast DNS is a handy way to find machines, and generally alleviates the need for assigning static IPs to local machines. But when connecting to that same LAN via a VPN, multicast DNS often isn't available, and suddenly you have to remember a bunch of IPs if you want to access the servers there. mdns-proxy is designed to act as an authoritative DNS server that responds to domain X (e.g. ".vpn") and proxies to the multicast DNS "Avahi" daemon using multicast domain Y (e.g. ".local"). On your local DNS server, you can manually delegate domain X to the mdns-proxy server. Now, if you query e.g. "myserver.vpn", mdns-proxy will receive your query and resolve it using Avahi as e.g. "myserver.local". In essence, domain X becomes a remote mirror of multicast domain Y, even though you have no way to do normal mDNS to the LAN over your VPN link. Usage ----- You'll need to edit the constants at the top to reflect your network configuration. Then just run the proxy. If you're using a caching DNS proxy like djbdns's "dnscache", you'll probably need to listen on the standard DNS port (53), which requires root privileges. If run as root, mdns-proxy will change to the "nobody" user after creating the UDP socket. (Alternatively, you can use NAT rules to allow you to listen on another port.) License ------- mdns-proxy is released under the standard 2-clause BSD license. See COPYING for details. Todo ---- * IPv6 support (if the internet ever finally switches)
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