Add time synchronization requirement option

[govpn.git] / doc / timeout.texi

diff --git a/doc/timeout.texi b/doc/timeout.texi
index e750177b3aa4f6c2e61093cffa0f5dffb746891f..89dcf1e500c8c76e4714c967e75455edc02b2e99 100644 (file)
--- a/doc/timeout.texi
+++ b/doc/timeout.texi
@@ -1,5 +1,6 @@
 @node Timeout
-@section Timeout
+@cindex Timeout
+@subsection Timeout
 
 Because of stateless UDP nature there is no way to reliably know if
 remote peer is alive. That is why timeouts are necessary. If no packets
@@ -12,3 +13,7 @@ the time, even if there is no traffic in corresponding TAP interfaces.
 @strong{Beware}: this consumes traffic.
 
 Stale peers and handshake states are cleaned up every timeout period.
+
+This applies to TCP connections too: relatively much time can pass until
+we understand that remote TCP peer is suddenly died and did not
+normally terminate connection.