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</o:shapelayout></xml><![endif]--></head><body lang=KO link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span lang=EN-US>HI!<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Suricata drops the invalid ACK packet. I want an invalid ACK packet to pass through.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>There is no drop rule.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Below is the log message :<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>¡°ssn 0x7f35202fe390: rejecting because of invalid ack value¡±<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>What should I set in the configuration file(suricata.yaml) to pass the invalid ACK packet?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Suricata Version : 3.1.2<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>OS </span>–<span lang=EN-US> linux debian 8<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Sincerely<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p></div></body></html>