Hello Steve, Thanks for your answer. Don't know why your provided answer is not working in my case. But I solved it in another way which I am sharing here for others timestamp : ([0-9]{4})-([0-1][0-9])-([0-3][0-9])\s([0-1][0-9]|[2][0-3]):([0-5][0-9]):([0-5][0-9]).(\d*) source_ip : (?:[0-9]{1,3}\.){3}[0-9]{1,3} Mac : ([0-9A-Fa-f]{2}[:]){5}([0-9A-Fa-f]{2}) dbm : (\d*)\z Thanks!
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