Add rebind plugin

content/explugins/rebind.md

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+title = "rebind"
+description = "*rebind* - rebinds domain names to a different IP address."
+weight = 10
+tags = [  "plugin" , "rebind" ]
+categories = [ "plugin", "external" ]
+date = "2024-06-17T00:00:00+00:00"
+repo = "https://github.com/ivantsepp/coredns-rebind"
+home = "https://github.com/ivantsepp/coredns-rebind/blob/main/README.md"
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+
+## Description
+
+The rebind plugin rebinds a domain from one IP address to another IP address to facilitate testing [DNS Rebinding vulnerabilities](https://en.wikipedia.org/wiki/DNS_rebinding).
+
+## Syntax
+
+~~~ corefile
+rebind example.com {
+  first_ip 1.2.3.4
+  second_ip 0.0.0.0
+  strategy first_then_second
+}
+~~~
+
+- **first_ip** is the first IP address. This is usually an IP address that you own
+- **second_ip** is the second IP address to rebind to. This is usually the target IP address of the vulnerable server
+- **strategy** is one of the following:
+  - first_then_second: responds with the `first_ip` and then responds with the `second_ip` address for all subsequent requests
+  - random: responds with a random selection of `first_ip` and `second_ip`
+  - round_robin: responds in a round robin fashion of `first_ip` and then `second_ip`
+
+## Examples
+
+In this configuration, a DNS request to `rebind.example.com` will receive a response of `1.2.3.4`. All future DNS requests will respond with `0.0.0.0`.
+
+~~~ corefile
+example.com {
+  rebind rebind.example.com {
+    first_ip 1.2.3.4
+    second_ip 0.0.0.0
+  }
+}
+~~~
+
+## Also See
+
+See the [manual](https://coredns.io/manual).