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-rw-r--r--docs/security.md2
1 files changed, 2 insertions, 0 deletions
diff --git a/docs/security.md b/docs/security.md
index b7df81959b..fd10f484c8 100644
--- a/docs/security.md
+++ b/docs/security.md
@@ -38,6 +38,8 @@ will be blocked and allowed during them.
Except what is described as allowed in this document, all network packets should be blocked.
+### Always allowed traffic
+
The following network traffic is always allowed to flow. It is never blocked, regardless of state:
1. All traffic on loopback adapters