Push content to Apache Traffic Server's Cache

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http://serverfault.com – I am trying to use push cache option of Apache Traffic Server(ATS), to push some content into my cache. I read the documentation, and tried to follow it but I have following questions/problems using this option: 1 - In the documentation it mentiones in order to enable PUSH request, modify proxy.config.http.quick_filter.mask in records.config. Yet I could not find such a super mask to modify in that file. Running grep -r proxy.config.http.quick_filter.mask . in ATS configuration folder shows me that this super mask exists in ip_allow.config file. Are they the same? Should I modify it there or (HowTos)