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+# Domain Filter
+
+The `allowedDomains` and `blockedDomains` config options allow you to specify a list of domains which are accessible or blocked during scraping.
+
+```javascript
+export const options = {
+    url: "http://example.com/",
+    allowedDomains: ["subdomain.example.com"],
+    // ...
+};
+```
+
+### `allowedDomains`
+
+This config option controls which additional domains are allowed to be visted during scraping. The domain of the initial URL is always allowed.
+
+You can also allow all domains to be accessible by setting `allowedDomains` to `["*"]`. To then further restrict access, you can specify `blockedDomains`.
+
+Example:
+
+```javascript
+export const options = {
+    url: "http://example.com/",
+    allowedDomains: ["*"],
+    // ...
+};
+```
+
+### `blockedDomains`
+
+This config option controls which additional domains are blocked from being accessed. By default all domains other than the domain of the initial URL or those specified in `allowedDomains` are blocked.
+
+You can best use `blockedDomains` in conjunction with `allowedDomains: ["*"]`, allowing the scraping process to access all domains except what's specified in `blockedDomains`.
+
+Example:
+
+```javascript
+export const options = {
+    url: "http://example.com/",
+    allowedDomains: ["*"],
+    blockedDomains: ["google.com", "bing.com"],
+    // ...
+};
+```