Why Enterprises Need Out-of-Band TLS Decryption
draft-fenter-tls-decryption-00

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Last updated 2018-03-05
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INTERNET-DRAFT                                                 S. Fenter
Intended Status: Informational          Enterprise Data Center Operators
Expires: September 6, 2018                                 March 5, 2018

            Why Enterprises Need Out-of-Band TLS Decryption 
                     draft-fenter-tls-decryption-00

Abstract

   Some enterprises are heavily TLS encrypted within their own
   enterprise network boundaries.  Many of these enterprises are also
   utilizing out-of-band TLS decryption in order to inspect their own
   traffic for purposes of troubleshooting, network security monitoring,
   and for other kinds of monitoring.  These monitoring functions are
   mission critical, and cannot just be done without when TLS 1.3
   (draft-ietf-tls-tls13-26) is released or when the RSA key exchange is
   someday deprecated from TLS 1.2 (RFC5246).  This draft will outline
   the use cases for out-of-band TLS decryption, as well as alternative
   suggestions for monitoring and troubleshooting and the limitations of
   those alternatives.

Status of this Memo

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Copyright and License Notice

   Copyright (c) 2018 IETF Trust and the persons identified as the
   document authors. All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
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   described in the Simplified BSD License.

 

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Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  5
   2.  Out-of-Band Decryption Use Cases for Diagnostics and
       Troubleshooting  . . . . . . . . . . . . . . . . . . . . . . .  6
     2.1  Application Performance Monitoring  . . . . . . . . . . . .  6
     2.2  Network Diagnostics and Troubleshooting . . . . . . . . . .  6
       2.2.1  Network Packet Analysis . . . . . . . . . . . . . . . .  6
       2.2.2  Packet Analysis with Source Address Translation . . . .  7
       2.2.3  TCP Pipelining - Session Multiplexing . . . . . . . . .  7
       2.2.4  TLS Encrypted MQ to the mainframe . . . . . . . . . . .  8
       2.2.5  Application Layer Data  . . . . . . . . . . . . . . . .  8
       2.2.6  Customer Experience Monitoring  . . . . . . . . . . . .  9
       2.2.7  VoIP Analysis . . . . . . . . . . . . . . . . . . . . .  9
     2.3  Out-of-Band Decryption Use Cases for Network Security
          Monitoring  . . . . . . . . . . . . . . . . . . . . . . . . 10
       2.3.1  Layer 7 DDoS Attacks  . . . . . . . . . . . . . . . . . 10
       2.3.2  Fraud Monitoring  . . . . . . . . . . . . . . . . . . . 10
       2.3.3  Intrusion Detection System  . . . . . . . . . . . . . . 11
       2.3.4  Threat Detection and Incident Response  . . . . . . . . 11
       2.3.5  Regulatory Examples . . . . . . . . . . . . . . . . . . 11
         2.3.5.1 PCI (Payment Card Industry)  . . . . . . . . . . . . 11
           2.3.5.1.1 PCI and TLS Encryption . . . . . . . . . . . . . 11
           2.3.5.1.2 Intrusion Detection  . . . . . . . . . . . . . . 12
           2.3.5.1.3 TLS 1.2 and PCI  . . . . . . . . . . . . . . . . 12
         2.3.5.2 e-CFR (Electronic Code of Federal Regulations) . . . 12
           2.3.5.2.1 Insider Abuse  . . . . . . . . . . . . . . . . . 12
         2.3.5.3 Regulatory Requirements - Summary  . . . . . . . . . 13
   3.  Alternative Solutions Offered and Their Limitations  . . . . . 13
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