This software is an answer to the fact that the Linux kernel does not support proxying of ICMPv6 Neighbor Discovery Protocol packets for whole IPv6 subnets, but only for a given set of single addresses.
ndp-proxy binds promiscuously to an interface, and when it receives an NDP Network Solicitation packet for an IPv6 address in any of one of many configured subnets, it will answer with a Network Advertisement packet, similar to an IPv4 Proxy ARP mechanism.
This enables the ability to easily route whole subnets through a machine acting as a router (or an address-space black-hole), without needing to configure a route to that machine on upstream routers. It is useful especially if upstream routers are managed by somebody else and cannot be modified.
The binary is intended to be used as a background daemon, managed with systemd. To run as a daemon, the -d option should always be provided.
Options:
-h --help Display this help
-c --configfile <configfile> Set the configuration file location manually
-i --interface <interface> Set the interface manually
-n --network <network> Add a network to proxy (NET::/CIDR format)
-p --pidfile <pidfile> Set the pidfile location manually
-l --logfile <logfile> Set the logfile location manually
-d --daemon Daemon mode; forks the running process into the background
-q --quiet Quiet mode; disables non-error output and logging forcibly
Note however that this will NOT disable syslogging
-v --verbosity <level> Verbosity level; overridden by Quiet mode
0 = same as quiet mode
1 = [default] output level; logs on startup and when a packet is proxied
2 = descriptive output level; very detailed description of operations
3 = debug logging; hexadecimal packet capturing
To install the daemon, simply run the following command in the project's base directory:
make && make install