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    Securing L2TP and IP Tunnels with IPsec References

    For more information about protocols for securing L2TP and IP tunnels with IPsec, consult the following resources:

    • RFC 2401—Security Architecture for the Internet Protocol (November 1998)
    • RFC 2661—Layer Two Tunneling Protocol “ L2TP” (August 1999)
    • RFC 3193—Securing L2TP using IPsec (November 2001)
    • RFC 3715—IPsec-Network Address Translation (NAT) Compatibility Requirements (March 2004)
    • Negotiation of NAT-Traversal in the IKE—draft-ietf-ipsec-nat-t-ike-08.txt (July 2004 expiration)
    • UDP Encapsulation of IPsec ESP Packets—draft-ietf-ipsec-udp-encaps-09.txt (November 2004 expiration)

      Note: The IETF drafts are valid for only 6 months from the date of issuance. They must be considered as works in progress. Please refer to the IETF website at for the latest drafts.

    For additional configuration information, see:

    Published: 2014-08-12