Dear All While executing TLS enabled Kamailio proxy (3.1.5), getting below error. * 0(15895) INFO: tls [tls_domain.c:227]: TLSs<default>: verify_depth=9 0(15895) ERROR: tls [tls_domain.c:393]: TLSs<default>: Unable to load certificate file './modules/tls/ser-selfsigned.pem' 0(15895) ERROR: tls [tls_domain.c:394]: load_cert:error:02001002:system library:fopen:No such file or directory 0(15895) ERROR: tls [tls_domain.c:394]: load_cert:error:20074002:BIO routines:FILE_CTRL:system lib 0(15895) ERROR: tls [tls_domain.c:394]: load_cert:error:140DC002:SSL routines:SSL_CTX_use_certificate_chain_file:system lib 0(15895) ERROR: <core> [sr_module.c:832]: init_mod_child(): Error while initializing module tls (/usr/local/lib/kamailio/modules/tls.so) 0(15895) ERROR: <core> [main.c:1532]: ERROR: main: error in init_child(PROC_INT) -- exiting 0(15895) : <core> [mem/q_malloc.c:431]: BUG: qm_free: bad pointer (nil) (out of memory block!) - aborting 0(15893) ERROR: <core> [daemonize.c:307]: Main process exited before writing to pipe * I performed below steps to compile and install. 1. I had a working Kamailio-3.1.5 code base without TLS 2. Downloaded latest openssl source code 3. Compiled and generated libssl.a and libcrypto.a 4. Next, I recompiled kamailio proxy, compilation did not go through. I had to modify Makefile in modules/tls module, added path for openssl/bio.h and path for libssl.a 5. Then executed make all clean and make all include_modules=tls , this time compilation succeeded 6. Next I did make install 7. Generated certificates using openssl library that comes by default with ubuntu 10.04 lte 8. Added below entries in kamailio.cfg #!define WITH_TLS #!ifdef WITH_TLS loadmodule "tls.so" modparam("tls", "config", "/usr/local/etc/kamailio/tls.cfg") modparam("tls", "private_key", "/etc/certs/localb2bua.com/key.pem") modparam("tls", "certificate", "/etc/certs/localb2bua.com/cert.pem") modparam("tls", "ca_list", "/etc/certs/demoCA/cert.pem") enable_tls=yes #!endif 9. Then I tried running kamailio proxy It complained not getting tls.so and tls.cfg Copied these files from modules/tls to /usr/local/etc/kamailio/ path 10. Then I was able to run Kamailio proxy and got the errors pasted at top of email (* Unable to load certificate file './modules/tls/ser-selfsigned.pem') * Please guide me what should I do to avoid this error. Thanks a lot. -Kamal * *