Mangle Packet Flow Diagram

                                  +---------+
                              +-->| Mangle  |--+
                              |   | Forward |  |
                              |   +---------+  |
                              |                V
                           _________        _________
+-------------------+     /         \      /         \       +-------------+
|     Global-in     |    |  Routing  |    |  Routing  |      |   Mangle    |
| (and global-total |--->|  Decision |    |  Decision |----> | Postrouting |
+-------------------+     \_________/      \_________/       +-------------+
     ^                        |                ^                    |
     |                        V                |                    V
+------------+         +------------+    +------------+      +------------------+
|  Mangle    |         |  Mangle    |    |   Mangle   |      |   Global-out     |
| Prerouting |         |   Input    |    |   Output   |      | (and global-out) |
------------+          +------------+    +------------+      +------------------+
     ^                        |                ^                    |
     |                        V                |                    V
+============+         +=-==-==-=-=-+----+=-=-=-=-=-=-+      +============+
|    INPUT   |         |    Local   |--->|   Local    |      |   OUTPUT   |
|  INTERFACE |         | Process-In |    |Process-Out |      | INTERFACE  |
+============+         +=-==-==-=-=-+----+=-=-=-=-=-=-+      +============+