cURL: connection refused from PHP, but works from command line
I have a strange behavior of cURL.
When I try to make a request using PHP functions, like this:
$curl = curl_init();
curl_setopt_array($curl, array(
CURLOPT_URL => "https://<url_here>",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_SSL_VERIFYPEER => false,
CURLOPT_SSL_VERIFYHOST => false,
CURLOPT_POST => 1,
CURLOPT_POSTFIELDS => "<body here>",
CURLOPT_HTTPHEADER => array(
"content-type: application/xml"
),
));
I get Failed to connect to <url_here> port 443: Connection refused.
But when I try to make exactly the same call from command line (on the server, where PHP script is located), I get a valid response. So, the environment is fine, nothing blocks the 443 port.
Moreover, when I run the same PHP code on another server, it also works.
Is it possible that some PHP configuration options prevents cURL from working? Or should I check something else?
Thanks.
Output of local curl_version():
array(9) {
["version_number"]=>
int(470784)
["age"]=>
int(3)
["features"]=>
int(968605)
["ssl_version_number"]=>
int(0)
["version"]=>
string(6) "7.47.0"
["host"]=>
string(19) "x86_64-pc-linux-gnu"
["ssl_version"]=>
string(14) "OpenSSL/1.0.2g"
["libz_version"]=>
string(5) "1.2.8"
["protocols"]=>
array(21) {
[0]=>
string(4) "dict"
[1]=>
string(4) "file"
[2]=>
string(3) "ftp"
[3]=>
string(4) "ftps"
[4]=>
string(6) "gopher"
[5]=>
string(4) "http"
[6]=>
string(5) "https"
[7]=>
string(4) "imap"
[8]=>
string(5) "imaps"
[9]=>
string(4) "ldap"
[10]=>
string(5) "ldaps"
[11]=>
string(4) "pop3"
[12]=>
string(5) "pop3s"
[13]=>
string(4) "rtmp"
[14]=>
string(4) "rtsp"
[15]=>
string(3) "smb"
[16]=>
string(4) "smbs"
[17]=>
string(4) "smtp"
[18]=>
string(5) "smtps"
[19]=>
string(6) "telnet"
[20]=>
string(4) "tftp"
}
}
Output of local curl -V:
curl 7.47.0 (x86_64-pc-linux-gnu) libcurl/7.47.0 GnuTLS/3.4.10 zlib/1.2.8 libidn/1.32 librtmp/2.3
Protocols: dict file ftp ftps gopher http https imap imaps ldap ldaps pop3 pop3s rtmp rtsp smb smbs smtp smtps telnet tftp
Features: AsynchDNS IDN IPv6 Largefile GSS-API Kerberos SPNEGO NTLM NTLM_WB SSL libz TLS-SRP UnixSockets
Output of server's curl_version():
array(9) {
["version_number"]=>
int(462597)
["age"]=>
int(2)
["features"]=>
int(1597)
["ssl_version_number"]=>
int(0)
["version"]=>
string(6) "7.15.5"
["host"]=>
string(23) "x86_64-redhat-linux-gnu"
["ssl_version"]=>
string(15) " OpenSSL/0.9.8b"
["libz_version"]=>
string(5) "1.2.3"
["protocols"]=>
array(9) {
[0]=>
string(4) "tftp"
[1]=>
string(3) "ftp"
[2]=>
string(6) "telnet"
[3]=>
string(4) "dict"
[4]=>
string(4) "ldap"
[5]=>
string(4) "http"
[6]=>
string(4) "file"
[7]=>
string(5) "https"
[8]=>
string(4) "ftps"
}
}
Answer
Thanks to Alex Blex's comment I enabled the verbose output for PHP cURL, and also run command line cURL with -vvv option.
It made me see, that command line request was sent through the proxy, actually, whilst PHP cURL tried to make a direct call, which failed.
Then I used CURLOPT_PROXY option for my PHP request and it also started to work.