diff --git a/code/datums/configuration.dm b/code/datums/configuration.dm
index d62589be825..a6e60a98d30 100644
--- a/code/datums/configuration.dm
+++ b/code/datums/configuration.dm
@@ -233,6 +233,9 @@
 				if ("guest_jobban")
 					config.guest_jobban = 1
 
+				if ("guest_ban")
+					guests_allowed = 0
+
 				if ("usewhitelist")
 					config.usewhitelist = 1
 
diff --git a/config/config.txt b/config/config.txt
index b79435f950e..251b06155c9 100644
--- a/config/config.txt
+++ b/config/config.txt
@@ -118,6 +118,9 @@ HOSTEDBY Yournamehere
 ## Set to 1 to jobban them from those positions, set to 0 to allow them.
 # GUEST_JOBBAN
 
+## Uncomment this to stop people connecting to your server without a registered ckey. (i.e. guest-* are all blocked from connecting)
+# GUEST_BAN
+
 ## Set to jobban everyone who's key is not listed in data/whitelist.txt from Captain, HoS, HoP, CE, RD, CMO, Warden, Security, Detective, and AI positions.
 ## Uncomment to 1 to jobban, leave commented out to allow these positions for everyone (but see GUEST_JOBBAN above and regular jobbans)
 # USEWHITELIST