diff --git a/README.md b/README.md
index b7ed7d8..64ddf02 100644
--- a/README.md
+++ b/README.md
@@ -10,6 +10,9 @@
 [MRV Optiswitch OS904 OS906 OS912 debug and diagnostic commands](MRV-Optiswitch-OS904-OS906-OS912-debug-and-diagnostic-commands.adoc) | [PDF](MRV-Optiswitch-OS904-OS906-OS912-debug-and-diagnostic-commands.pdf)
 
 
+[Linux and PF BSD firewalls cheat sheet](Linux-and-BSD-firewalls-cheat-sheet.adoc) | [PDF](Linux-and-BSD-firewalls-cheat-sheet.pdf)
+
+