Hello,   I just realisied I made a mistake and send this reply to the wrong mail address.   The OPTIONS are keepalive-request and out-of-dialog. So topos is not able to manage these?   I also tried topoh. Topoh was able to mask the contact header even in out-of-dialog OPTIONS.  The main reason to switch to topos is the line=sr-parameter. Some calls got a very long line=sr-parameter which lead to problems with different SBC vendors.   line=sr-N6IAzBqLOBFsWLZfz.P7M.PszBjAWByXoSI7g.ulNJuzWqI0kqKlCxWwk.t5j6KskhrfW4u1RqtHPq31KLssWquZM.phWIp0MwpPjKpd..g-Oqs0..gSoF47.9pWotgMgLsWgqud.qfhOq46.RfP.SN7.jfWoUId.9r9NqudCEfWkFuC.RfsRU0Kg9e5Ctp0owpIWFcsmwtzkmvb>     Is there any way to reduce the length of the line=sr-parameter?   Thanks!   Best Regards Enzo     *Gesendet:* Donnerstag, 12. März 2020 um 08:40 Uhr *Von:* "Daniel-Constantin Mierla" <miconda(a)gmail.com> *An:* "Kamailio (SER) - Users Mailing List" <sr-users(a)lists.kamailio.org>rg>, Enzo <voiper(a)gmx.net> *Betreff:* Re: [SR-Users] Use topos module to hide contact in OPTIONS request Hello, the module aimed at supporting topology hiding for calls. Is the OPTIONS part of a dialog or out-of-dialog (like a keepalive request)? Cheers, Daniel On 11.03.20 16:02, Enzo wrote: Hi all I have a problem with the topos module. The contact header in OPTIONS request is not changed. It is working fine with INVITE. Is there any special configuration with OPTIONS?   I am using: version: kamailio 5.3.2 (x86_64/linux) 7ba545   This is the debug log: Mar 11 15:52:13 kamtest /usr/local/kamailio/sbin/kamailio[55606]: DEBUG: topos [tps_msg.c:934]: tps_request_sent(): handling outgoing request (0, 0) Mar 11 15:52:13 kamtest /usr/local/kamailio/sbin/kamailio[55606]: DEBUG: topos [tps_msg.c:376]: tps_pack_message(): compacted headers - x_via1: [SIP/2.0/UDP 122.123.145.146;branch=z9hG4bK8ee.c6d59104d9f494f8ba1f75ed3f9ec8cf.0](79) - x_via2: [SIP/2.0/UDP 172.26.52.104:5060;branch=z9hG4bK00E0F5150A04105449BBEB83377A](73) - x_vbranch1: [z9hG4bK8ee.c6d59104d9f494f8ba1f75ed3f9ec8cf.0](45) Mar 11 15:52:13 kamtest /usr/local/kamailio/sbin/kamailio[55606]: DEBUG: topos [tps_msg.c:485]: tps_pack_message(): compacted headers - a_rr: [](0) - b_rr: [](0) - s_rr: [](0) Mar 11 15:52:13 kamtest /usr/local/kamailio/sbin/kamailio[55606]: DEBUG: topos [tps_msg.c:490]: tps_pack_message(): compacted headers - as_contact: [](0) - bs_contact: [](0) Mar 11 15:52:13 kamtest /usr/local/kamailio/sbin/kamailio[55606]: DEBUG: topos [tps_storage.c:126]: tps_storage_lock_get(): tps lock get: 337 Mar 11 15:52:13 kamtest /usr/local/kamailio/sbin/kamailio[55606]: DEBUG: topos_redis [topos_redis_storage.c:764]: tps_redis_load_branch(): loading branch record for [b:x:z9hG4bK8ee.c6d59104d9f494f8ba1f75ed3f9ec8cf.0] Mar 11 15:52:13 kamtest /usr/local/kamailio/sbin/kamailio[55606]: DEBUG: topos_redis [topos_redis_storage.c:782]: tps_redis_load_branch(): hmap with key [b:x:z9hG4bK8ee.c6d59104d9f494f8ba1f75ed3f9ec8cf.0] not found Mar 11 15:52:13 kamtest /usr/local/kamailio/sbin/kamailio[55606]: DEBUG: topos [tps_storage.c:391]: tps_storage_link_msg(): downstream: yes - acontact: [sip:172.26.52.104:5060] - bcontact: [] Mar 11 15:52:13 kamtest /usr/local/kamailio/sbin/kamailio[55606]: WARNING: topos [tps_storage.c:434]: tps_storage_record(): no local address - do record routing for all initial requests Mar 11 15:52:13 kamtest /usr/local/kamailio/sbin/kamailio[55606]: INFO: topos_redis [topos_redis_storage.c:163]: tps_redis_insert_dialog(): no uuid for this message Mar 11 15:52:13 kamtest /usr/local/kamailio/sbin/kamailio[55606]: ERROR: topos [tps_storage.c:445]: tps_storage_record(): failed to store Mar 11 15:52:13 kamtest /usr/local/kamailio/sbin/kamailio[55606]: DEBUG: topos [tps_storage.c:138]: tps_storage_lock_release(): tps lock release: 337 Mar 11 15:52:13 kamtest /usr/local/kamailio/sbin/kamailio[55606]: DEBUG: topos [topos_mod.c:449]: tps_msg_sent(): new outbound buffer generated This is the config I use: modparam("ndb_redis", "server", "name=srv8;addr=127.0.0.1;port=6379;db=8") modparam("topos", "storage", "redis") modparam("topos_redis", "serverid", "srv8") modparam("topos", "branch_expire", 14400) modparam("topos", "dialog_expire", 14400)   Best Regards Enzo     _______________________________________________ Kamailio (SER) - Users Mailing List sr-users(a)lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users -- Daniel-Constantin Mierla -- www.asipto.com www.twitter.com/miconda -- www.linkedin.com/in/miconda Kamailio World Conference - April 27-29, 2020, in Berlin -- www.kamailioworld.com _______________________________________________ Kamailio (SER) - Users Mailing List sr-users(a)lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users