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Cisco IOS Router RTR Security Technical Implementation Guide

Rules, Groups, and Values defined within the XCCDF Benchmark

  • SRG-NET-000018-RTR-000001

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco router must be configured to enforce approved authorizations for controlling the flow of information within the network based on organization-defined information flow control policies.

    &lt;VulnDiscussion&gt;Information flow control regulates where information is allowed to travel within a network and between interconnected network...
    Rule Medium Severity
    Show

  • SRG-NET-000168-RTR-000078

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco router must be configured to enable routing protocol authentication using FIPS 198-1 algorithms with keys not exceeding 180 days of lifetime.

    &lt;VulnDiscussion&gt;A rogue router could send a fictitious routing update to convince a site's perimeter router to send traffic to an incorrect o...
    Rule Medium Severity
    Show

  • SRG-NET-000019-RTR-000007

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco router must be configured to have all inactive interfaces disabled.

    &lt;VulnDiscussion&gt;An inactive interface is rarely monitored or controlled and may expose a network to an undetected attack on that interface. U...
    Rule Low Severity
    Show

  • SRG-NET-000362-RTR-000109

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco router must not be configured to have any zero-touch deployment feature enabled when connected to an operational network.

    &lt;VulnDiscussion&gt;Network devices that are configured via a zero-touch deployment or auto-loading feature can have their startup configuration ...
    Rule Medium Severity
    Show

  • SRG-NET-000362-RTR-000110

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco router must be configured to protect against or limit the effects of denial-of-service (DoS) attacks by employing control plane protection.

    &lt;VulnDiscussion&gt;The Route Processor (RP) is critical to all network operations because it is the component used to build all forwarding paths...
    Rule High Severity
    Show

  • SRG-NET-000362-RTR-000111

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco router must be configured to have Gratuitous ARP disabled on all external interfaces.

    &lt;VulnDiscussion&gt;A gratuitous ARP is an ARP broadcast in which the source and destination MAC addresses are the same. It is used to inform the...
    Rule Medium Severity
    Show

  • SRG-NET-000362-RTR-000112

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco router must be configured to have IP directed broadcast disabled on all interfaces.

    &lt;VulnDiscussion&gt;An IP directed broadcast is a datagram sent to the broadcast address of a subnet that is not directly attached to the sending...
    Rule Low Severity
    Show

  • SRG-NET-000362-RTR-000113

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco router must be configured to have Internet Control Message Protocol (ICMP) unreachable messages disabled on all external interfaces.

    &lt;VulnDiscussion&gt;The ICMP supports IP traffic by relaying information about paths, routes, and network conditions. Routers automatically send ...
    Rule Medium Severity
    Show

  • SRG-NET-000362-RTR-000114

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco router must be configured to have Internet Control Message Protocol (ICMP) mask reply messages disabled on all external interfaces.

    &lt;VulnDiscussion&gt;The ICMP supports IP traffic by relaying information about paths, routes, and network conditions. Routers automatically send ...
    Rule Medium Severity
    Show

  • SRG-NET-000362-RTR-000115

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco router must be configured to have Internet Control Message Protocol (ICMP) redirect messages disabled on all external interfaces.

    &lt;VulnDiscussion&gt;The ICMP supports IP traffic by relaying information about paths, routes, and network conditions. Routers automatically send ...
    Rule Medium Severity
    Show

  • SRG-NET-000078-RTR-000001

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco router must be configured to log all packets that have been dropped at interfaces via an ACL.

    &lt;VulnDiscussion&gt;Auditing and logging are key components of any security architecture. It is essential for security personnel to know what is ...
    Rule Low Severity
    Show

  • SRG-NET-000076-RTR-000001

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco router must be configured to produce audit records containing information to establish where the events occurred.

    &lt;VulnDiscussion&gt;Without establishing where events occurred, it is impossible to establish, correlate, and investigate the events leading up t...
    Rule Medium Severity
    Show

  • SRG-NET-000077-RTR-000001

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco router must be configured to produce audit records containing information to establish the source of the events.

    &lt;VulnDiscussion&gt;Without establishing the source of the event, it is impossible to establish, correlate, and investigate the events leading up...
    Rule Medium Severity
    Show

  • SRG-NET-000019-RTR-000001

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco router must be configured to disable the auxiliary port unless it is connected to a secured modem providing encryption and authentication.

    &lt;VulnDiscussion&gt;The use of POTS lines to modems connecting to network devices provides clear text of authentication traffic over commercial c...
    Rule Low Severity
    Show

  • SRG-NET-000202-RTR-000001

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco perimeter router must be configured to deny network traffic by default and allow network traffic by exception.

    &lt;VulnDiscussion&gt;A deny-all, permit-by-exception network communications traffic policy ensures that only connections that are essential and ap...
    Rule High Severity
    Show

  • SRG-NET-000019-RTR-000002

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco perimeter router must be configured to enforce approved authorizations for controlling the flow of information between interconnected networks in accordance with applicable policy.

    &lt;VulnDiscussion&gt;Information flow control regulates authorized information to travel within a network and between interconnected networks. Con...
    Rule Medium Severity
    Show

  • SRG-NET-000364-RTR-000109

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco perimeter router must be configured to only allow incoming communications from authorized sources to be routed to authorized destinations.

    &lt;VulnDiscussion&gt;Unrestricted traffic may contain malicious traffic that poses a threat to an enclave or to other connected networks. Addition...
    Rule Medium Severity
    Show

  • SRG-NET-000364-RTR-000110

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco perimeter router must be configured to block inbound packets with source Bogon IP address prefixes.

    &lt;VulnDiscussion&gt;Packets with Bogon IP source addresses should never be allowed to traverse the IP core. Bogon IP networks are RFC1918 address...
    Rule Medium Severity
    Show

  • SRG-NET-000019-RTR-000008

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco perimeter router must be configured to protect an enclave connected to an alternate gateway by using an inbound filter that only permits packets with destination addresses within the sites address space.

    &lt;VulnDiscussion&gt;Enclaves with alternate gateway connections must take additional steps to ensure there is no compromise on the enclave networ...
    Rule High Severity
    Show

  • SRG-NET-000019-RTR-000009

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco perimeter router must be configured to not be a Border Gateway Protocol (BGP) peer to an alternate gateway service provider.

    &lt;VulnDiscussion&gt;ISPs use BGP to share route information with other autonomous systems (i.e. other ISPs and corporate networks). If the perime...
    Rule High Severity
    Show

  • SRG-NET-000019-RTR-000010

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco perimeter router must be configured to not redistribute static routes to an alternate gateway service provider into BGP or an IGP peering with the NIPRNet or to other autonomous systems.

    &lt;VulnDiscussion&gt;If the static routes to the alternate gateway are being redistributed into an Exterior Gateway Protocol or Interior Gateway P...
    Rule Low Severity
    Show

  • SRG-NET-000205-RTR-000003

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco perimeter router must be configured to filter traffic destined to the enclave in accordance with the guidelines contained in DoD Instruction 8551.1.

    &lt;VulnDiscussion&gt;Vulnerability assessments must be reviewed by the System Administrator, and protocols must be approved by the Information Ass...
    Rule Medium Severity
    Show

  • SRG-NET-000205-RTR-000004

    <GroupDescription></GroupDescription>
    Group
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  • The Cisco perimeter router must be configured to filter ingress traffic at the external interface on an inbound direction.

    &lt;VulnDiscussion&gt;Access lists are used to separate data traffic into that which it will route (permitted packets) and that which it will not r...
    Rule Medium Severity
    Show

  • SRG-NET-000205-RTR-000005

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco perimeter router must be configured to filter egress traffic at the internal interface on an inbound direction.

    &lt;VulnDiscussion&gt;Access lists are used to separate data traffic into that which it will route (permitted packets) and that which it will not r...
    Rule Medium Severity
    Show

  • SRG-NET-000364-RTR-000111

    <GroupDescription></GroupDescription>
    Group
    Show

  • The Cisco perimeter router must be configured to have Link Layer Discovery Protocol (LLDP) disabled on all external interfaces.

    &lt;VulnDiscussion&gt;LLDP is a neighbor discovery protocol used to advertise device capabilities, configuration information, and device identity. ...
    Rule Low Severity
    Show

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