Block HTTPS upload traffic that includes credit card information

This configuration will block HTTPS upload traffic that includes credit card information. The pre-defined data type for credit card is used in the dictionary.

To block HTTPS upload traffic that includes credit card information in the GUI:

1. Configure the DLP dictionary:

   1. Go to Security Profiles > Data Loss Prevention, select the Dictionary tab, and click Create New.

   2. Enter a name (dic-case1).

   3. In the Dictionary Entries section, click Create New.

   4. Set the Type to credit-card and click OK.

      

   5. Click OK.

   6. Click OK to save the dictionary.

2. Configure the DLP sensor:

   1. Go to Security Profiles > Data Loss Prevention, select the Sensor tab, and click Create New.

   2. Enter a name (sensor-case1).

   3. In the Sensor Entries section, click Add. The Select Entries pane is displayed.

   4. Select Managed Locally from the dropdown menu.

   5. Select dic-case1 and click Apply.

      

   6. Click Apply.

   7. Click OK to save the sensor.

3. Configure the DLP profile:

   1. Go to Security Profiles > Data Loss Prevention, select the Profile tab, and click Create New.

   2. Enter a name (profile-case1).

   3. In the Rules section, click Create New.

   4. Configure the following settings:

      Name	1
      Sensors	sensor-case1
      Severity	Medium
      Action	Block
      Type	File
      File type	builtin-patterns
      Protocol	HTTP-POST, HTTP-GET

      

   5. Click OK.

   6. Click OK to save the profile.

4. Add the DLP profile to a firewall policy:

   1. Go to Policy & Objects > Firewall Policy and click Create New.

   2. Set the Inspection Mode to Proxy-based.

   3. In the Security Profiles section, enable DLP Profile and select profile-case1.

   4. Configure the other settings as needed.

   5. Click OK.

      When a credit card is included in HTTP POST traffic, the file is blocked and a DLP log is generated.

To block HTTPS upload traffic that includes credit card information in the CLI:

1. Configure the DLP dictionary:

   config dlp dictionary
       edit "dic-case1"
           config entries
               edit 1
                   set type "credit-card"
               next
           end
       next
   end

2. Configure the DLP sensor:

   config dlp sensor
       edit "sensor-case1"
           config entries
               edit 1
                   set dictionary "dic-case1"
               next
           end
       next
   end

3. Configure the DLP profile:

   config dlp profile
       edit "profile-case1"
           set feature-set proxy
           config rule
               edit 1
                   set name "1"
                   set proto http-get http-post
                   set filter-by sensor
                   set file-type 1
                   set sensor "sensor-case1"
                   set action block
               next
           end
       next
   end

4. Add the DLP profile to a firewall policy:

   config firewall policy
       edit 1
           set srcintf "port2"
           set dstintf "port1"
           set action accept
           set srcaddr "all"
           set dstaddr "all"
           set srcaddr6 "all"
           set dstaddr6 "all"
           set schedule "always"
           set service "ALL"
           set utm-status enable
           set inspection-mode proxy
           set profile-protocol-options "protocol"
           set ssl-ssh-profile "protocols"
           set dlp-profile "profile-case1"
           set nat enable
       next
   end

   When a credit card is included in HTTP POST traffic, a replacement message appears because it is blocked. A DLP log is generated.

Sample log

From Windows, the following command below can be used to generate a sample log, using the cURL tool to post data, which contains a sample credit card number. See sample-data for sample credit card numbers.

# curl –k -d 4024007149133315 https://172.16.200.55/card.doc -o?

1: date=2022-10-26 time=11:25:01 eventtime=1666808700281057923 tz="-0700" logid="0954024576" type="utm" subtype="dlp" eventtype="dlp" level="warning" vd="root" ruleid=1 rulename="1" dlpextra="builtin-patterns;sensor-case1" filtertype="sensor" filtercat="file" severity="medium" policyid=1 poluuid="891a526a-51cd-51ed-577a-6505bec88af9" policytype="policy" sessionid=3905 epoch=2143297701 eventid=0 srcip=10.1.100.11 srcport=40370 srccountry="Reserved" srcintf="port2" srcintfrole="undefined" srcuuid="502d2c8e-51cd-51ed-a24e-a091f4ff6fed" dstip=172.16.200.55 dstport=443 dstcountry="Reserved" dstintf="port1" dstintfrole="undefined" dstuuid="502d2c8e-51cd-51ed-a24e-a091f4ff6fed" proto=6 service="HTTPS" filetype="msoffice" direction="outgoing" action="block" hostname="172.16.200.55" url="https://172.16.200.55/card.doc" agent="curl/7.83.1" httpmethod="POST" filename="card.doc" filesize=108 profile="profile-case1"