godnsbl

Package godnsbl lets you perform RBL (Real-time Blackhole List - https://en.wikipedia.org/wiki/DNSBL) lookups using Golang

The command-line tool in cmd demonstrates the use of goroutines to perform concurrent lookups.

To test:

go clone https://github.com/mrichman/godnsbl
cd godnsbl/cmd/godnsbl
go run main.go 127.0.0.2

The output will be a JSON-formatted list of results with the following fields:

[
...
{
   "address":"127.0.0.2",
   "listed":true,
   "text":"Client host blocked using Barracuda Reputation, see http://www.barracudanetworks.com/reputation/?r=1\u0026ip=127.0.0.2",
   "error":false,
   "error_type":null
}
...
]