Hi There, I'm having a problem with mod_xml_curl on Windows (2008 R2) while attempting to curl requests/ responses over HTTPS. While running request over HTTP the curl works fine but simply switching to HTTPS causes the process to error. I've checked the IIS logs on our webserver and can see the requests are not arriving and running a packet trace on the Freeswitch server it seems the request is not even leaving the server which points towards a configuration problem within freeswitch itself either within the Curl Config or something relating to OpenSSL. Here is the error I receive from the Freeswitch logs: 2012-02-27 22:50:14.284328 [ERR] mod_xml_curl.c:305 Received HTTP error 0 trying to fetch https://xxxx.xxxxxx-contact.com/FreeSwitchModXmlCurlServer/FreeswitchCurlSer... data: [hostname=DS_Freeswitch§ion=directory&tag_name=domain&key_name=name&key_value=sipxxxx.xxxxxx--contact.com&Event-Name=REQUEST_PARAMS&Core-UUID=a474 3447-f6f2-4dd7-b8c2-81df33cb533b&FreeSWITCH-Hostname=DS_Freeswitch&FreeSWITCH-Switchname=DS_Freeswitch&FreeSWITCH-IPv4=10.1.1.98&FreeSWITCH-IPv6=%3A%3A1&Eve nt-Date-Local=2012-02-27%2022%3A50%3A14&Event-Date-GMT=Mon,%2027%20Feb%202012%2022%3A50%3A14%20GMT&Event-Date-Timestamp=1330383014284328&Event-Calling-File= sofia_reg.c&Event-Calling-Function=sofia_reg_parse_auth&Event-Calling-Line-Number=2108&action=sip_auth&sip_profile=sipPhones&sip_user_agent=Yealink%20SIP-T2 2P%xxx.xxx.xxx.xxx%2000%3A15%3A65%3A22%3A24%3A29&sip_auth_username=1001&sip_auth_realm=sipxxxx.xxxxxx--contact.com&sip_auth_nonce=d0587e72-xxxx-4734-f391a5 54987f&sip_auth_uri=sip%3Asipxxxx.xxxxxx--contact.com&sip_contact_user=1001&sip_contact_host=87.194.173.226&sip_to_user=1001&sip_to_host=sipxxxx.xxxxxx--con tact.com&sip_from_user=1001&sip_from_host=sipxxxx.xxxxxx--contact.com&sip_request_host=sipxxxx.xxxxxx--contact.com&sip_auth_qop=auth&sip_auth_cnonce=0a4f113 b&sip_auth_nc=00000004&sip_auth_response=418b5804263d3cbaa75e25beecdf5088&sip_auth_method=REGISTER&key=id&user=1001&domain=sipxxxx.xxxxxx--contact.com&ip=xxx.xxx.xxx.xxx] The Xml_curl.conf.xml only has the Curl URL added with all other variables commented out so I wouldn't expect anything in there to cause any problems. This only leaves me with OpenSSL. Freeswitch was definitely built with OpenSSL however it seems some of the configuration for OpenSSL is default to Linux UNC paths. For example if I attempt to create TLS certificates from the command prompt I receive this error: C:\FreeSwitch>openssl req -new -out "careq.pem" -newkey rsa:1024 -keyout "cakey.pem" -config "tmpfile1.cfg" -nodes -sha1 WARNING: can't open config file: /usr/local/ssl/openssl.cnf error on line -1 of tmpfile1.cfg 3568:error:02001002:system library:fopen:No such file or directory:..\..\openssl-1.0.0a\crypto\bio\bss_file.c:163:fopen(' 3568:error:2006D080:BIO routines:BIO_new_file:no such file:..\..\openssl-1.0.0a\crypto\bio\bss_file.c:166: 3568:error:0E078072:configuration file routines:DEF_LOAD:no such file:..\..\openssl-1.0.0a\crypto\conf\conf_def.c:197: After calling the following to redirect open SSL to another version of the .cnf file it requires (installed from www.openssl.org<http://www.openssl.org> ) set OPENSSL_CONF="C:\Program Files (x86)\GnuWin32\share\openssl.cfg" The this eliminates the first error but ther sys library, Bio Routine and Configuration file routines errors still appear 3568:error:02001002:system library:fopen:No such file or directory:..\..\openssl-1.0.0a\crypto\bio\bss_file.c:163:fopen(' 3568:error:2006D080:BIO routines:BIO_new_file:no such file:..\..\openssl-1.0.0a\crypto\bio\bss_file.c:166: 3568:error:0E078072:configuration file routines:DEF_LOAD:no such file:..\..\openssl-1.0.0a\crypto\conf\conf_def.c:197: Does anyone have any idea what the problem could be here? I could be looking in completely the wrong place for the answer here. Any help, advice or direction would be greatly appreciated. Thanks Rob