diff --git a/modules/generators/challenges/misc/programming/echo_string/secgen_local/challenge.rb b/modules/generators/challenges/misc/programming/echo_string/secgen_local/challenge.rb
index 3aee60a09..b0eff5f2e 100644
--- a/modules/generators/challenges/misc/programming/echo_string/secgen_local/challenge.rb
+++ b/modules/generators/challenges/misc/programming/echo_string/secgen_local/challenge.rb
@@ -1,17 +1,19 @@
 require 'securerandom'
 require 'timeout'
 
+$stdout.sync = true  # Disable stdout caching (for challenges that can be run over the network)
 puts 'Prepare yourself. You need to work quickly for this challenge.'
+
 sleep 2
 puts 'Echo the string back to me before the script times out. Try writing a script of your own to make it easier!'
 sleep 2
 puts 'Get ready, here we go...'
 sleep 2
-
 # Generate random string
 string = [SecureRandom.base64(rand(20..40)), SecureRandom.hex(rand(20..40))].sample
 
 puts string
+STDOUT.flush
 
 begin
   Timeout.timeout 0.25 do
diff --git a/scenarios/examples/ctf_challenge_examples/echo_string_example.xml b/scenarios/examples/ctf_challenge_examples/echo_string_example.xml
index 367ef3a2a..95ed3434b 100644
--- a/scenarios/examples/ctf_challenge_examples/echo_string_example.xml
+++ b/scenarios/examples/ctf_challenge_examples/echo_string_example.xml
@@ -10,7 +10,13 @@
 		<base platform="linux" type="server"/>
 
 		<!-- 1) Default uses an account and drops the challenge in the users home directory -->
-		<vulnerability module_path=".*echo_string.*"/>
+		<!--<vulnerability module_path=".*echo_string.*"/>-->
+
+        <vulnerability module_path=".*echo_string.*">
+          <input into="port">
+            <value>1337</value>
+          </input>
+        </vulnerability>
 
 		<network type="private_network" range="dhcp"/>
 	</system>