Allow blacklisting CIDR ranges

Cargo.lock

@@ -352,6 +352,15 @@ version = "2.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9a3a5bfb195931eeb336b2a7b4d761daec841b97f947d34394601737a7bba5e4"
 
+[[package]]
+name = "ipnetwork"
+version = "0.20.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bf466541e9d546596ee94f9f69590f89473455f88372423e0008fc1a7daf100e"
+dependencies = [
+ "serde",
+]
+
 [[package]]
 name = "is_terminal_polyfill"
 version = "1.70.0"
@@ -431,6 +440,7 @@ version = "0.1.0"
 dependencies = [
  "env_logger",
  "futures-util",
+ "ipnetwork",
  "log",
  "serde",
  "serde_json",