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Virtual Private Network (VPN) Security Requirements Guide

Rules, Groups, and Values defined within the XCCDF Benchmark

  • SRG-NET-000510

    <GroupDescription></GroupDescription>
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  • The IPsec VPN Gateway IKE must use NIST FIPS-validated cryptography to implement encryption services for unclassified VPN traffic.

    &lt;VulnDiscussion&gt;Use of weak or untested encryption algorithms undermines the purposes of utilizing encryption to protect data. The VPN gatewa...
    Rule Medium Severity
    Show

  • SRG-NET-000512

    <GroupDescription></GroupDescription>
    Group
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  • The IPsec VPN Gateway must use Internet Key Exchange (IKE) for IPsec VPN Security Associations (SAs).

    &lt;VulnDiscussion&gt;Without IKE, the SPI is manually specified for each security association. IKE peers will negotiate the encryption algorithm a...
    Rule High Severity
    Show

  • SRG-NET-000518

    <GroupDescription></GroupDescription>
    Group
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  • The VPN Client logout function must be configured to terminate the session on/with the VPN Gateway.

    &lt;VulnDiscussion&gt;If a user cannot explicitly end a session, the session may remain open and be exploited by an attacker; this is referred to a...
    Rule Medium Severity
    Show

  • SRG-NET-000519

    <GroupDescription></GroupDescription>
    Group
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  • The VPN Client must display an explicit logout message to users indicating the reliable termination of authenticated communications sessions.

    &lt;VulnDiscussion&gt;If a user cannot explicitly end a session, the session may remain open and be exploited by an attacker; this is referred to a...
    Rule Medium Severity
    Show

  • SRG-NET-000522

    <GroupDescription></GroupDescription>
    Group
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  • For site-to-site, VPN Gateway must be configured to store only cryptographic representations of pre-shared Keys (PSKs).

    &lt;VulnDiscussion&gt;PSKs need to be protected at all times, and encryption is the standard method for protecting passwords. If PSKs are not encry...
    Rule Medium Severity
    Show

  • SRG-NET-000525

    <GroupDescription></GroupDescription>
    Group
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  • The IPsec VPN must use AES256 or greater encryption for the IPsec proposal to protect the confidentiality of remote access sessions.

    &lt;VulnDiscussion&gt;Without confidentiality protection mechanisms, unauthorized individuals may gain access to sensitive information via a remote...
    Rule High Severity
    Show

  • SRG-NET-000530

    <GroupDescription></GroupDescription>
    Group
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  • The TLS VPN Gateway that supports Government-only services must prohibit client negotiation to TLS 1.1, TLS 1.0, SSL 2.0, or SSL 3.0.

    &lt;VulnDiscussion&gt;Using older unauthorized versions or incorrectly configuring protocol negotiation makes the gateway vulnerable to known and u...
    Rule Medium Severity
    Show

  • SRG-NET-000540

    <GroupDescription></GroupDescription>
    Group
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  • The TLS VPN Gateway that supports citizen- or business-facing network devices must prohibit client negotiation to SSL 2.0 or SSL 3.0.

    &lt;VulnDiscussion&gt;Using older unauthorized versions or incorrectly configuring protocol negotiation makes the gateway vulnerable to known and u...
    Rule Medium Severity
    Show

  • SRG-NET-000550

    <GroupDescription></GroupDescription>
    Group
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  • The VPN Gateway that provides a Simple Network Management Protocol (SNMP) Network Management System (NMS) must configure SNMPv3 to use FIPS-validated AES cipher block algorithm.

    &lt;VulnDiscussion&gt;Without device-to-device authentication, communications with malicious devices may be established. Bidirectional authenticati...
    Rule Medium Severity
    Show

  • SRG-NET-000565

    <GroupDescription></GroupDescription>
    Group
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  • The VPN remote access server must be configured use cryptographic algorithms approved by NSA to protect NSS for remote access to a classified network.

    &lt;VulnDiscussion&gt;Use of weak or untested encryption algorithms undermines the purposes of utilizing encryption to protect data. The VPN gatewa...
    Rule High Severity
    Show

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