Hi, try to update to a maintained version (e.g. recent 5.3.x or 5.4.x) – in TLS support there have been several bugs fixed in newer releases. Cheers, Henning -- Henning Westerholt – https://skalatan.de/blog/ Kamailio services – https://gilawa.com *From:* sr-users &lt;sr-users-bounces(a)lists.kamailio.org&gt; *On Behalf Of *surendra p *Sent:* Monday, February 22, 2021 5:26 AM *To:* sr-users(a)lists.kamailio.org *Subject:* [SR-Users] Kamailio Crash in TLS acceppt Hi Team, Kamailio 5.2 getting crashed in tls_accept. Can someone help over here. #0 0x00007f1b135c09b2 in EVP_DecryptUpdate () from /usr/lib/x86_64-linux-gnu/libcrypto.so.1.1 #1 0x00007f1b135f3034 in ?? () from /usr/lib/x86_64-linux-gnu/libcrypto.so.1.1 #2 0x00007f1b135f36a3 in ?? () from /usr/lib/x86_64-linux-gnu/libcrypto.so.1.1 #3 0x00007f1b135f4051 in RAND_DRBG_reseed () from /usr/lib/x86_64-linux-gnu/libcrypto.so.1.1 #4 0x00007f1b135f457d in RAND_DRBG_generate () from /usr/lib/x86_64-linux-gnu/libcrypto.so.1.1 #5 0x00007f1b135f46f1 in RAND_DRBG_bytes () from /usr/lib/x86_64-linux-gnu/libcrypto.so.1.1 #6 0x00007f1b1378649e in ?? () from /usr/lib/x86_64-linux-gnu/libssl.so.1.1 #7 0x00007f1b13777f5f in ?? () from /usr/lib/x86_64-linux-gnu/libssl.so.1.1 #8 0x00007f1b13763f34 in SSL_do_handshake () from /usr/lib/x86_64-linux-gnu/libssl.so.1.1 #9 0x00007f1acf246fce in tls_accept (c=0x7f1ad35fdc60, error=0x7ffc238dd1dc) at tls_server.c:411 #10 0x00007f1acf2503a3 in tls_read_f (c=0x7f1ad35fdc60, flags=0x7ffc238dd50c) at tls_server.c:1097 #11 0x0000559ac2ec9b46 in tcp_read_headers (c=0x7f1ad35fdc60, read_flags=0x7ffc238dd50c) at core/tcp_read.c:462 #12 0x0000559ac2eced1c in tcp_read_req (con=0x7f1ad35fdc60, bytes_read=0x7ffc238dd514, read_flags=0x7ffc238dd50c) at core/tcp_read.c:1348 #13 0x0000559ac2ed5442 in handle_io (fm=0x7f1b13d2cef8, events=8193, idx=-1) at core/tcp_read.c:1715 #14 0x0000559ac2ec424a in io_wait_loop_epoll (h=0x559ac3153f80 <io_w>, t=2, repeat=0) at core/io_wait.h:1073 #15 0x0000559ac2ed6df4 in tcp_receive_loop (unix_sock=75) at core/tcp_read.c:1829 #16 0x0000559ac2db8685 in tcp_init_children () at core/tcp_main.c:4802 #17 0x0000559ac2cb6867 in main_loop () at main.c:1714 #18 0x0000559ac2cbd6af in main (argc=15, argv=0x7ffc238ddb88) at main.c:2644