Hi, how do I fix this problem: Failed Registration with status DNS Error [503]? I already search the net but couldn't find a proper answer. The only thing that I found was something about DNS SRV Resource Record but this was fixed in freeswitch a long time ago. *My Setup:* FreeSWITCH Version 1.6.19 Debian 7 wheezy Freeswitch(Debian) -> Router(OpenBSD) -> Internet *Failed Registration with status DNS Error [503]* 2018-06-29 19:27:21.732868 [NOTICE] sofia_reg.c:448 Registering telekom_voip nua.c:622 nua_register() nua: nua_register: entering nua_stack.c:529 nua_signal() nua(0x8c8c0c8): sent signal r_register nua_stack.c:569 nua_stack_signal() nua(0x8c8c0c8): recv signal r_register nua_params.c:480 nua_stack_set_params() nua: nua_stack_set_params: entering soa.c:403 soa_set_params() soa_set_params(static::0xb5c1a298, ...) called nua_dialog.c:338 nua_dialog_usage_add() nua(0x8c8c0c8): adding register usage nta.c:4417 nta_leg_tcreate() nta_leg_tcreate(0xb6279478) nta.c:2665 nta_tpn_by_url() nta: selecting scheme sip sres_cache.c:272 sres_cache_get() sres_cache_get(0x8ccd7b0, NAPTR, " sip-trunk.telekom.de.") called sres_cache.c:318 sres_cache_get() sres_cache_get(0x8ccd7b0, NAPTR, " sip-trunk.telekom.de.") returned 1 entries nta.c:10398 outgoing_query_naptr() nta: for "sip-trunk.telekom.de" query " sip-trunk.telekom.de" NAPTR (cached) sres_cache.c:272 sres_cache_get() sres_cache_get(0x8ccd7b0, SRV, "_sip._ udp.sip-trunk.telekom.de.") called sres_cache.c:318 sres_cache_get() sres_cache_get(0x8ccd7b0, SRV, "_sip._ udp.sip-trunk.telekom.de.") returned 1 entries nta.c:10598 outgoing_query_srv() nta: for "sip-trunk.telekom.de" query "_sip._udp.sip-trunk.telekom.de" SRV (cached) sres_cache.c:272 sres_cache_get() sres_cache_get(0x8ccd7b0, A, " sip-trunk.telekom.de.") called sres_cache.c:318 sres_cache_get() sres_cache_get(0x8ccd7b0, A, " sip-trunk.telekom.de.") returned 1 entries nta.c:10803 outgoing_query_a() nta: for "sip-trunk.telekom.de" query " sip-trunk.telekom.de" A (cached) nta.c:1350 set_timeout() nta: timer set to 32000 ms nta.c:1348 set_timeout() nta: timer shortened to 5000 ms nua_stack.c:271 nua_stack_event() nua(0x8c8c0c8): event r_register 503 DNS Error nua_dialog.c:397 nua_dialog_usage_remove_at() nua(0x8c8c0c8): removing register usage nta.c:4470 nta_leg_destroy() nta_leg_destroy(0xb6279478) nua_stack.c:359 nua_application_event() nua: nua_application_event: entering nua.c:366 nua_handle_magic() nua: nua_handle_magic: entering 2018-06-29 19:27:21.732868 [ERR] sofia_reg.c:2447 telekom_voip Failed Registration with status DNS Error [503]. failure #34 nua.c:366 nua_handle_magic() nua: nua_handle_magic: entering 2018-06-29 19:27:22.772957 [WARNING] sofia_reg.c:505 telekom_voip Failed Registration [503], setting retry to 30 seconds. nta.c:9101 outgoing_timer_dk() nta: timer K fired, terminate REGISTER (124810556) nta.c:8799 outgoing_reclaim_queued() outgoing_reclaim_all((nil), (nil), 0xb60911e0) nta.c:8929 _nta_outgoing_timer() nta_outgoing_timer: 0/0 resent, 0/0 tout, 1/1 term, 1/1 free nta.c:1289 agent_timer() nta: timer not set *sofia_dig --tcp reg.sip-trunk.telekom.de <http://reg.sip-trunk.telekom.de>* Preference Weight Transport Port Address ================================================================================ 1 1.000 tcp 5060 217.0.26.165 2 1.000 tcp 5060 217.0.26.163 3 1.000 tcp 5060 217.0.26.133 *Gateway settings* <include> <gateway name="telekom_voip"> <param name="username" value=„XXXXXXXX“/> <param name="password" value=„XXXXXXXX“/> <param name="proxy" value="reg.sip-trunk.telekom.de"/> <param name="register-proxy" value="sip-trunk.telekom.de"/> <param name="register" value="true"/> <param name="register-transport" value="tcp"/> <param name="expire-seconds" value="3600"/> </gateway> </include> Regards, Paul