diff --git a/roles/xmpp_server/files/ferm_xmpp.conf b/roles/xmpp_server/files/ferm_xmpp.conf
index f1b2e8fb0f9d425e5d0f1c88e6d46928af22aaa3..9d519ee08e2e9c2d43a74f09c0e13e122812d05e 100644
--- a/roles/xmpp_server/files/ferm_xmpp.conf
+++ b/roles/xmpp_server/files/ferm_xmpp.conf
@@ -8,6 +8,8 @@ domain (ip ip6) {
             proto tcp dport 5000 ACCEPT;
             # XMPP server connections.
             proto tcp dport 5269 ACCEPT;
+            # HTTP file upload.
+            proto tcp dport 5281 ACCEPT;
         }
     }
 }