diff --git a/docs/run/nodes/nodes.md b/docs/run/nodes/nodes.md
index 0c675504a..d5bff3131 100644
--- a/docs/run/nodes/nodes.md
+++ b/docs/run/nodes/nodes.md
@@ -264,7 +264,7 @@ The Ceramic daemon serves an HTTP API that clients use to interact with your Cer
 
 ### **Staying connected to IPFS**
 
-Ceramic nodes rely on IPFS for networking. IPFS nodes connect to each other using a Libp2p module called "switch" (aka "swarm"). This module operates over a websocket, on port `4011` by default. The websocket port must be accessible to the internet so your Ceramic node can be connected to the network.
+Ceramic nodes rely on IPFS for networking. IPFS nodes connect to each other using a Libp2p module called "switch" (aka "swarm"). This module operates over a websocket, on port `4001` by default, as well as port `4011`. The websocket port must be accessible to the internet so your Ceramic node can be connected to the network, i.e. not blocked by a firewall. In addition, the port must match the swarm address announced by IPFS.
 
 !!! warning ""