diff --git a/docs/configuring-playbook-jitsi.md b/docs/configuring-playbook-jitsi.md
index f72241e1..81ceb9fb 100644
--- a/docs/configuring-playbook-jitsi.md
+++ b/docs/configuring-playbook-jitsi.md
@@ -13,8 +13,8 @@ Before installing Jitsi, make sure you've created the `jitsi.DOMAIN` DNS record.
 
 You may also need to open the following ports to your server:
 
-- `10000/udp` - RTP media over UDP
 - `4443/tcp` - RTP media fallback over TCP
+- `10000/udp` - RTP media over UDP. Depending on your firewall/NAT setup, incoming RTP packets on port `10000` may have the external IP of your firewall as destination address, due to the usage of STUN in JVB (see [`matrix_jitsi_jvb_stun_servers`](../roles/matrix-jitsi/defaults/main.yml)).
 
 
 ## Installation
diff --git a/docs/prerequisites.md b/docs/prerequisites.md
index 8b7e9d00..39b42ef1 100644
--- a/docs/prerequisites.md
+++ b/docs/prerequisites.md
@@ -34,7 +34,6 @@ If your distro runs within an [LXC container](https://linuxcontainers.org/), you
   - `5349/udp`: TURN over UDP (used by Coturn)
   - `8448/tcp`: Matrix Federation API HTTPS webserver. In some cases, this **may necessary even with federation disabled**. Integration Servers (like Dimension) and Identity Servers (like ma1sd) may need to access `openid` APIs on the federation port.
   - the range `49152-49172/udp`: TURN over UDP
-  - `4443/tcp`: Jitsi Harvester fallback
-  - `10000/udp`: Jitsi video RTP. Depending on your firewall/NAT setup, incoming RTP packets on port `10000` may have the external IP of your firewall as destination address, due to the usage of STUN in JVB (see [`matrix_jitsi_jvb_stun_servers`](../roles/matrix-jitsi/defaults/main.yml)).
+  - potentially some other ports, depending on the additional (non-default) services that you enable in the **configuring the playbook** step (later on). Consult each service's documentation page in `docs/` for that.
 
 When ready to proceed, continue with [Configuring DNS](configuring-dns.md).