Hello, remove_hf() removes the entire header, including its parameters. The issue here seems to be related to the fact that you remove Via header and the core adds rport and received parameters -- this happens due to requirements from SIP RFCs. What you need to do is to apply changes once the Via is removed so the core doesn't see it anymore, see: - http://kamailio.org/wiki/tutorials/faq/main#why_changes_made_to_headers_or Cheers, Daniel On 03/03/15 01:28, Yuriy Gorlichenko wrote: I need to remove all header line witht tags but remove_hf() removes only Header:value All tags after ";" stay at the packet as garbage and next Header moves up As there ACK sip:12345678900@phone.provider.com <javascript:_e(%7B%7D,'cvml','sip:12345678900@phone.provider.com');> SIP/2.0 Via: SIP/2.0/UDP sip.server.com:5068 ;branch=z9hG4bKcb7a.9f70ce5990dd153cd0eaa6f1762c059c.0.cs102 *<There var another Via header that I removed with remove_hf_re but tags is stiil there and Route header mover up>*;rport=1578;received=23.101.134.111Route: <sip:54.241.2.206;lr=on;ftag=as38f20f7b;did=ce8.10a> Max-Forwards: 70 From: "New User" <sip:00987654321@phone.provider.com <javascript:_e(%7B%7D,'cvml','sip:00987654321@phone.provider.com');> To: <sip:12345678900@phone.provider.com <javascript:_e(%7B%7D,'cvml','sip:12345678900@phone.provider.com');> Contact: <sip:contact@10.0.1.17:50600;alias=23.101.134.111~1578~1> Call-ID: 473fc8a64d7d96aa515780dc6237a6d5@10.0.1.17:50600 CSeq: 103 ACK User-Agent: Some Device Content-Length: 0 _______________________________________________ SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing listsr-users(a)lists.sip-router.org <javascript:_e(%7B%7D,'cvml','sr-users@lists.sip-router.org');>http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users -- Daniel-Constantin Mierlahttp://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda Kamailio World Conference, May 27-29, 2015 Berlin, Germany - http://www.kamailioworld.com _______________________________________________ SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users(a)lists.sip-router.org <javascript:_e(%7B%7D,'cvml','sr-users@lists.sip-router.org');> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users