[SR-Users] User offline

Hello, I use kamailio set up an IMS on a cloud server in a public network, and have alice and bob registered on the server using ImsDroid in a private network. When I use alice to call bob, I got "User offline" error. Below are .pcap file captured from 4060 port and pcscf.log/icscf.log/scscf.log and all config files(in kamailio.zip) 4060.pcap <http://sip-router.1086192.n5.nabble.com/file/n148166/4060.pcap> pcscf.log <http://sip-router.1086192.n5.nabble.com/file/n148166/pcscf.log> icscf.log <http://sip-router.1086192.n5.nabble.com/file/n148166/icscf.log> scscf.log <http://sip-router.1086192.n5.nabble.com/file/n148166/scscf.log> kamailio.zip <http://sip-router.1086192.n5.nabble.com/file/n148166/kamailio.zip> My kamailio version and debian operating system version is like below: root@iZ94lg22es7Z:~# kamailio -version version: kamailio 4.4.0 (x86_64/linux) d4f23c 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, Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, 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: d4f23c compiled on 13:02:46 May 5 2016 with gcc 4.9.2 root@iZ94lg22es7Z:~# root@iZ94lg22es7Z:~# cat /etc/issue Debian GNU/Linux 8 \n \l root@iZ94lg22es7Z:~# Can anybody give me some help? Any suggestion will be appreciated! -- View this message in context: http://sip-router.1086192.n5.nabble.com/User-offline-tp148166.html Sent from the Users mailing list archive at Nabble.com.