II - Mission Support Classified
Rules and Groups employed by this XCCDF Profile
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SRG-NET-000205
<GroupDescription></GroupDescription>Group -
The perimeter router must be configured to filter egress traffic at the internal interface on an inbound direction.
<VulnDiscussion>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 -
SRG-NET-000205
<GroupDescription></GroupDescription>Group -
The BGP router must be configured to reject outbound route advertisements for any prefixes belonging to the IP core.
<VulnDiscussion>Outbound route advertisements belonging to the core can result in traffic either looping or being black holed, or at a minimu...Rule Medium Severity -
SRG-NET-000205
<GroupDescription></GroupDescription>Group -
The PE router must be configured to block any traffic that is destined to IP core infrastructure.
<VulnDiscussion>IP/MPLS networks providing VPN and transit services must provide, at the least, the same level of protection against denial-o...Rule High Severity -
SRG-NET-000205
<GroupDescription></GroupDescription>Group -
The PE router must be configured with Unicast Reverse Path Forwarding (uRPF) loose mode enabled on all CE-facing interfaces..
<VulnDiscussion>The uRPF feature is a defense against spoofing and denial-of-service (DoS) attacks by verifying if the source address of any ...Rule Medium Severity -
SRG-NET-000205
<GroupDescription></GroupDescription>Group -
The out-of-band management (OOBM) gateway must be configured to transport management traffic to the Network Operations Center (NOC) via dedicated circuit, MPLS/VPN service, or IPsec tunnel.
<VulnDiscussion>Using dedicated paths, the OOBM backbone connects the OOBM gateway routers located at the edge of the managed network and at ...Rule Medium Severity -
SRG-NET-000205
<GroupDescription></GroupDescription>Group -
The out-of-band management (OOBM) gateway router must be configured to forward only authorized management traffic to the Network Operations Center (NOC).
<VulnDiscussion>The OOBM network is an IP network used exclusively for the transport of OAM&P data from the network being managed to the ...Rule Medium Severity -
SRG-NET-000205
<GroupDescription></GroupDescription>Group -
The out-of-band management (OOBM) gateway router must be configured to block any traffic destined to itself that is not sourced from the OOBM network or the NOC.
<VulnDiscussion>If the gateway router is not a dedicated device for the OOBM network, several safeguards must be implemented for containment ...Rule Medium Severity -
SRG-NET-000205
<GroupDescription></GroupDescription>Group -
The router must be configured to only permit management traffic that ingresses and egresses the OOBM interface.
<VulnDiscussion>The OOBM access switch will connect to the management interface of the managed network elements. The management interface can...Rule Medium Severity -
SRG-NET-000205
<GroupDescription></GroupDescription>Group -
The router providing connectivity to the NOC must be configured to forward all in-band management traffic via an IPsec tunnel.
<VulnDiscussion>When the production network is managed in-band, the management network could be housed at a NOC that is located remotely at s...Rule Medium Severity -
SRG-NET-000235
<GroupDescription></GroupDescription>Group -
The router must be configured to stop forwarding traffic upon the failure of the following actions: system initialization, shutdown, or system abort.
<VulnDiscussion>Failure to a known safe state helps prevent systems from failing to a state that may cause loss of data or unauthorized acces...Rule Medium Severity
Node 2
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