diff --git a/infogathering/index.md b/infogathering/index.md
index 589cc05..1855999 100644
--- a/infogathering/index.md
+++ b/infogathering/index.md
@@ -62,9 +62,11 @@ Network Scanners
 OS Fingerprinting
 ------------
 
- * [first]()
- * [second]()
- * [third]()
+ * [dnmap-client](../tools/dnmap-client.md)
+ * [dnmap-server](../tools/dnmap-server.md)
+ * [miranda](../tools/miranda.md)
+ * [nmap](../tools/nmap.md)
+ * [zenmap](../tools/zenmap.md)
 
 OSINT Analysis
 ------------