Splunk® App for PCI Compliance

Installation and Configuration Manual

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Configure Prohibited Traffic list

The PCI data security standards requires that systems in a cardholder data environment only include services necessary on the system. Using the Prohibited Traffic list, PCI compliance solutions administrators can define a list of prohibited services that they do not expect to see on systems within the environment.

To view the Prohibited Traffic list, do the following:

  1. Select Configure > Content > Content Management.
  2. Click the Prohibited Traffic lookup. The Prohibited Traffic lookup file (prohibited_traffic.csv) appears in the lookup editor.
transport,src,src_pci_domain,dest,dest_pci_domain,dest_port,is_prohibited,is_secure,note
*,*,cardholder,*,untrust,*,true,false,deny_all_cardholder_to_untrust
*,*,untrust,*,cardholder,*,true,false,deny_all_untrust_to_cardholder
*,*,wireless,*,cardholder,80,true,false,deny_http_wireless_to_cardholder
icmp,*,untrust,*,dmz,*,false,,permit_icmp_untrust_to_dmz
tcp,*,untrust,*,dmz,80,false,,permit_tcp80_untrust_to_dmz
tcp,*,untrust,*,dmz,443,false,true,permit_tcp443_untrust_to_dmz
udp,*,untrust,*,dmz,500,false,true,permit_udp500_untrust_to_dmz
udp,*,untrust,*,dmz,4500,false,true,permit_udp4500_untrust_to_dmz
tcp,*,untrust,*,dmz,1723,false,true,permit_tcp1723_untrust_to_dmz
udp,*,untrust,*,dmz,1701,false,true,permit_udp1701_untrust_to_dmz
udp,*,dmz,*,cardholder,514,false,,permit_udp514_dmz_to_cardholder
tcp,*,dmz,*,cardholder,443,false,,permit_tcp443_dmz_to_cardholder
tcp,*,trust,*,trust,22,false,true,permit_tcp22_inside_trust
tcp,*,trust,*,trust,80,false,,permit_tcp80_inside_trust
...

The first line in the file describes the fields in the file.

Field Description Example
transport The transport protocol. TCP
src The host that is the source of the activity. Use a wildcard * to match all hosts. ACME_host_002
src_pci_domain The source domain of the activity. cardholder
dest The host that is the destination of the activity. Use a wildcard * to match all hosts. ACME_host_001
dest_pci_domain The source domain of of the activity. cardholder
dest_port The destination port of the activity. 80
is_prohibited Is the service/traffic/port prohibited? true
false
is_secure Is the traffic for the given service encrypted (secure)? true
false
note A description about the traffic or activity. permit_icmp_untrust_to_dmz
src_category Category of the source pci_cardholder
dest_category Category of the source pci_cardholder

Add to, or modify this list using the editor. Click Save when you are done.

There is no file checking or verification for this editor, so any typo might break the lookup file.

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This documentation applies to the following versions of Splunk® App for PCI Compliance: 3.7.0, 3.7.1, 3.7.2, 3.8.0


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