diff --git a/aliases b/aliases
index 0474bfeb..06cca797 100644
--- a/aliases
+++ b/aliases
@@ -343,6 +343,8 @@ alias gfontshelper="librewolf https://google-webfonts-helper.herokuapp.com/fonts
 alias iconify="librewolf https://iconify.design/ &"
 # for domain names
 alias namecheap="librewolf https://namecheap.com/ &"
+# a great introduction to tls/ssl practices and rules of thumb:
+alias feistyduck="librewolf https://www.feistyduck.com/library/bulletproof-tls-guide/online/ &"
 # tutorials including how to set up ssl authentication and renewals with cerbot:
 alias easynewbie="librewolf https://easynewbie.com &"
 # even easier for ssl certificates is to use letsencrypt: