diff --git a/config/description.exs b/config/description.exs
index f6331dd30..2c7d91ccc 100644
--- a/config/description.exs
+++ b/config/description.exs
@@ -3270,13 +3270,14 @@
         key: :proxies,
         type: {:list, :string},
         description:
-          "A list of strings in [CIDR](https://en.wikipedia.org/wiki/CIDR) notation specifying the IPs of known proxies. Default: `[]`."
+          "A list of upstream proxy IP subnets in CIDR notation. Defaults to `[]`. IPv4 entries without a bitmask will be assumed to be /32 and IPv6 /128."
       },
       %{
         key: :reserved,
         type: {:list, :string},
-        description:
-          "Defaults to [localhost](https://en.wikipedia.org/wiki/Localhost) and [private network](https://en.wikipedia.org/wiki/Private_network)."
+        description: """
+          A list of reserved IP subnets in CIDR notation which should be ignored if found in `headers`. Defaults to `["127.0.0.0/8", "::1/128", "fc00::/7", "10.0.0.0/8", "172.16.0.0/12", "192.168.0.0/16"]`
+        """
       }
     ]
   },
diff --git a/docs/configuration/cheatsheet.md b/docs/configuration/cheatsheet.md
index e0194525d..22333c4f8 100644
--- a/docs/configuration/cheatsheet.md
+++ b/docs/configuration/cheatsheet.md
@@ -427,8 +427,8 @@ Available options:
 
 * `enabled` - Enable/disable the plug. Defaults to `false`.
 * `headers` - A list of strings naming the `req_headers` to use when deriving the `remote_ip`. Defaults to `["x-forwarded-for"]`.
-* `proxies` - A list of strings in [CIDR](https://en.wikipedia.org/wiki/CIDR) notation specifying the IPs of known proxies. Defaults to `[]`.
-* `reserved` - Defaults to [localhost](https://en.wikipedia.org/wiki/Localhost) and [private network](https://en.wikipedia.org/wiki/Private_network).
+* `proxies` - A list of upstream proxy IP subnets in CIDR notation. Defaults to `[]`. IPv4 entries without a bitmask will be assumed to be /32 and IPv6 /128.
+* `reserved` - A list of reserved IP subnets in CIDR notation which should be ignored if found in `headers`. Defaults to `["127.0.0.0/8", "::1/128", "fc00::/7", "10.0.0.0/8", "172.16.0.0/12", "192.168.0.0/16"]`.
 
 
 ### :rate_limit