diff --git a/modules/cli-tools.nix b/modules/cli-tools.nix
index 7cf3ffa..f6f8d68 100644
--- a/modules/cli-tools.nix
+++ b/modules/cli-tools.nix
@@ -48,9 +48,11 @@
     gatling # high performance web serve
     iperf
     iperf2 # bandwidth measurement tool
+    nmap # port scanner
     sshfs # mount remote host
     vnstat # client for vnstatd
     whois # whois client
+    zmap # scanner for large address spaces
 
     # system tools
     libva-utils # vainfo