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Felix Erlacher, Simon Woertz and Falko Dressler, "A TLS Interception Proxy with Real-Time Libpcap Export," Proceedings of 41st IEEE Conference on Local Computer Networks (LCN 2016), Demo Session, Dubai, United Arab Emirates, November 2016.


The usage of HTTPS and thereby the Transport Layer Security (TLS) protocol is constantly becoming more ubiquitous. This renders classic Deep Packet Inspection (DPI) approaches on the, now encrypted, application layer useless. The concept of TLS interception proxies is to decrypt the application layer data going through the proxy and to make it available for further processing. The decrypted data varies in form and content depending on the used proxy application. Most currently available tools store this data in plain text format consisting of the decrypted application layer data together with additional metadata describing the connection. This is useful if single connections have to be analyzed but generally fails for network monitoring tools such as Intrusion Detection System (IDS) due to missing lower layer network connection information. We developed a TLS interception proxy that exports in real-time not only the decrypted TLS application data records but also lower layer information using the well known libpcap format. This enables other network monitoring tools to further process the exported data and apply DPI techniques as well as detection rules that inspect the lower layers.

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Felix Erlacher
Simon Woertz
Falko Dressler

BibTeX reference

    author = {Erlacher, Felix and Woertz, Simon and Dressler, Falko},
    title = {{A TLS Interception Proxy with Real-Time Libpcap Export}},
    publisher = {IEEE},
    address = {Dubai, United Arab Emirates},
    booktitle = {41st IEEE Conference on Local Computer Networks (LCN 2016), Demo Session},
    month = {11},
    year = {2016},

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