Hi, Can you please elaborate about the part where you said "drop rest of the packets". If an OPTIONs is incoming you can send reply and then exit; a drop is like silently discarding a packet as far as I know.   Do you meant to discard any further packets in same dialog or transaction to be matched and discarded/dropped ?  Regards, Sammy On Sun, Mar 31, 2019, 5:54 AM PICCORO McKAY Lenz, &lt;mckaygerhard(a)gmail.com <mailto:mckaygerhard@gmail.com>> wrote: h have this for a custom rule agains spoecific messages:         sl_send_reply("200", "OK");    drop();         exit; my question are if that rules are correct: i want to drop but send firts to client a ok response.. i mean client receive "all are ok dont worry" and then drop the rest packets.. that's correct? Lenz McKAY Gerardo (PICCORO) http://qgqlochekone.blogspot.com _______________________________________________ Kamailio (SER) - Users Mailing List sr-users(a)lists.kamailio.org <mailto:sr-users@lists.kamailio.org> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users _______________________________________________ Kamailio (SER) - Users Mailing List sr-users(a)lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users