diff --git a/README.md b/README.md
index 0379a22..fba7c1e 100644
--- a/README.md
+++ b/README.md
@@ -46,6 +46,7 @@ For options we expose here, for information see: https://bird.network.cz/?get_do
  * `bgp_rpki_refresh`: How long to wait in seconds before attempting to poll RPKI cache data after the last successful poll.  Defaults to `900`.
  * `bgp_rpki_expire`: How long to keep any records locally cached before they are deleted.  Defaults to `172800` (2 days).
  * `bgp_rpki_known_hosts`: The file path for the SSH key `known_hosts` file to use when validating remote RPKI hosts.  Defaults to `/etc/bird/rpki/known_hosts` (provided by Lixonet; don't change this unless you need to!).
+
 # Setup
 
 Prerequisites:
@@ -53,7 +54,7 @@ Prerequisites:
 2. `eth0` is the **LAN** or **WAN** interface supporting external routing, DNS, etc., and is the **birdged** interface to a router that will statically route the entire desired network subnet (i.e. x.x.0.0/16) through it
 4. `tun` and `tap` are in `/etc/modules` to load at boot (https://www.cyberciti.biz/faq/linux-how-to-load-a-kernel-module-automatically-at-boot-time/) and the system has been rebooted afterwards.
 5. `sigil` is installed (`curl -L "https://github.com/gliderlabs/sigil/releases/download/v0.5.0/sigil_0.5.0_$(uname -sm|tr ' ' '_').tgz" | tar -zxC /usr/local/bin`)
-
+6. IPv4 forwarding is on: `sysctl -w net.ipv4.ip_forward=1` and `iptables -P FORWARD ACCEPT` are run (and persisted) to allow IP forwarding.
 Install:
 1. Clone this repository: `git clone`
 2. `mkdir /etc/lixonet/`