Add ipsec ebpf packet processing diagram

Signed-off-by: Mohamed S. Mahmoud <mmahmoud2201@gmail.com>

Author: msherif1234

content/posts/2025-07-07-ipsec/index.md

@@ -44,6 +44,11 @@ To monitor decryption:
 - Set a **`kprobe`** on the `xfrm_input` function to trace when decryption is triggered.
 - Use a **`kretprobe`** on `xfrm_input` to capture the return code and associated flow information, helping determine success or failure.
 
+The following diagram shows how IPsec packets is processed at ebpf layers and how the netobserv flow been created and updated to reflect ipsec packet processing status
+
+
+![IPsec eBPF packet processing](ipsec.png)
+
 ---
 
 ## Network Observability Enrichment