diff --git a/sshd_config b/sshd_config
index efc7dce..32d527c 100644
--- a/sshd_config
+++ b/sshd_config
@@ -100,6 +100,7 @@ PrintMotd no # pam does that
 #ClientAliveCountMax 3
 #UseDNS no
 #PidFile /run/sshd.pid
+PerSourceMaxStartups 1
 #MaxStartups 10:30:100
 #PermitTunnel no
 #ChrootDirectory none