Hi all. This question has already been asked in the past: https://lists.kamailio.org/pipermail/sr-users/2015-July/089083.html But I don't see any answer if this is supported. Can you tell me if it is possible to enable the IMS to talk to HSS using Cx (diameter) over SCTP ? In the source code (kamailio/src/modules/cdp/configparser.c) I can see only these parameters for Peer node: - FQDN - Realm - port - src_addr but there is no protocol parameter. I tried with the example VM here: https://www.kamailio.org/w/2016/02/kamailio-ims-getting-started-box/ I started all services and dumped the traffic with wireshark. The transport is TCP. This VM uses an older version of kamailio: ==================================================== kamailio -v version: kamailio 4.3.4 (x86_64/linux) 583dc0 flags: STATS: Off, USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MEM, SHM_MMAP, PKG_MALLOC, DBG_QM_MALLOC, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN 16, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB poll method support: poll, epoll_lt, epoll_et, sigio_rt, select. id: 583dc0 compiled on 21:01:04 Dec 1 2015 with gcc 4.9.2 ==================================================== So I installed the latest stable but it seems it also uses TCP. Regards. _______________________________________________ Kamailio (SER) - Users Mailing List sr-users(a)lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users