diff --git a/FAQ.md b/FAQ.md
index 7a8dc76..688e608 100644
--- a/FAQ.md
+++ b/FAQ.md
@@ -339,4 +339,20 @@ Above may not work in some distro or gnome version, here is fix (may be not prop
 # Prevent andoid service from being killed by system
 https://github.com/rustdesk/rustdesk/issues/6192#issuecomment-1848358333
 
+# Failed to connect via rendezvous server: Please try later
+
+https://github.com/rustdesk/rustdesk/issues/388#issuecomment-1915892570
+
+Case study: 
+
+> A: What happened lately?
+
+> B: Nothing, our rustdesk works since 8 months. But this morning it’s doesn’t work.
+
+> A: I believe there is some unawared router/network or firewall change on your side causing the problem. You can check access log (controlled device) to see if there is something different. https://github.com/rustdesk/rustdesk/wiki/FAQ#access-logs
+
+> B: Thanks, you have the true answer. The issue come from our Fortinet Client.
+
+
+