Analyzing Tunnel Log Traffic Using Splunk SIEM

Title: Analyzing Tunnel Log Traffic Using Splunk SIEM

URL Source: https://hassen-hannachi.medium.com/analyzing-tunnel-log-traffic-using-splunk-siem-643ea9c9337c?source=rss------cybersecurity-5

Published Time: 2026-05-05T20:17:44Z

Markdown Content:
# Analyzing Tunnel Log Traffic Using Splunk SIEM | by Hassen Hannachi | May, 2026 | Medium

[Sitemap](https://hassen-hannachi.medium.com/sitemap/sitemap.xml)

[Open in app](https://play.google.com/store/apps/details?id=com.medium.reader&referrer=utm_source%3DmobileNavBar&source=post_page---top_nav_layout_nav-----------------------------------------)

Sign up

[Sign in](https://medium.com/m/signin?operation=login&redirect=https%3A%2F%2Fhassen-hannachi.medium.com%2Fanalyzing-tunnel-log-traffic-using-splunk-siem-643ea9c9337c&source=post_page---top_nav_layout_nav-----------------------global_nav------------------)

[](https://medium.com/?source=post_page---top_nav_layout_nav-----------------------------------------)

Get app

[Write](https://medium.com/m/signin?operation=register&redirect=https%3A%2F%2Fmedium.com%2Fnew-story&source=---top_nav_layout_nav-----------------------new_post_topnav------------------)

[Search](https://medium.com/search?source=post_page---top_nav_layout_nav-----------------------------------------)

Sign up

[Sign in](https://medium.com/m/signin?operation=login&redirect=https%3A%2F%2Fhassen-hannachi.medium.com%2Fanalyzing-tunnel-log-traffic-using-splunk-siem-643ea9c9337c&source=post_page---top_nav_layout_nav-----------------------global_nav------------------)


# Analyzing Tunnel Log Traffic Using Splunk SIEM

[](https://hassen-hannachi.medium.com/?source=post_page---byline--643ea9c9337c---------------------------------------)

[Hassen Hannachi](https://hassen-hannachi.medium.com/?source=post_page---byline--643ea9c9337c---------------------------------------)

Follow

7 min read

·

1 hour ago

[](https://medium.com/m/signin?actionUrl=https%3A%2F%2Fmedium.com%2F_%2Fvote%2Fp%2F643ea9c9337c&operation=register&redirect=https%3A%2F%2Fhassen-hannachi.medium.com%2Fanalyzing-tunnel-log-traffic-using-splunk-siem-643ea9c9337c&user=Hassen+Hannachi&userId=bd4a1e5ed7c8&source=---header_actions--643ea9c9337c---------------------clap_footer------------------)

[](https://medium.com/m/signin?actionUrl=https%3A%2F%2Fmedium.com%2F_%2Fbookmark%2Fp%2F643ea9c9337c&operation=register&redirect=https%3A%2F%2Fhassen-hannachi.medium.com%2Fanalyzing-tunnel-log-traffic-using-splunk-siem-643ea9c9337c&source=---header_actions--643ea9c9337c---------------------bookmark_footer------------------)

[Listen](https://medium.com/m/signin?actionUrl=https%3A%2F%2Fmedium.com%2Fplans%3Fdimension%3Dpost_audio_button%26postId%3D643ea9c9337c&operation=register&redirect=https%3A%2F%2Fhassen-hannachi.medium.com%2Fanalyzing-tunnel-log-traffic-using-splunk-siem-643ea9c9337c&source=---header_actions--643ea9c9337c---------------------post_audio_button------------------)

Share

Press enter or click to view image in full size


Modern networks rely heavily on encrypted tunnels — **_VPNs_**, **_GRE_**, **_IPSec_** — to securely move data across untrusted environments. While these tunnels **_protect confidentiality_**, they can also obscure visibility, making them a prime channel for misuse or even **_data exfiltration_**. This is where Splunk SIEM becomes a powerful ally.

## Get Hassen Hannachi’s stories in your inbox

Join Medium for free to get updates from this writer.

Subscribe

Subscribe

- [x]

Remember me for faster sign in



In this post, we’ll walk through how to analyze tunnel log traffic using Splunk, **_uncover suspicious behavior_**, and build actionable insights for security monitoring.

### Why Tunnel Traffi