CSF Curl and Sendy Software

FYI.. I removed the phpinfo file for security reasons

reading the rest

 

I doubt it's to do with curl version itself - it could be particular outgoing port being blocked so if you know the sendy outgoing port it would help

Amazon SES has a massive amount of IP address ranges so not sure if whitelisting them all is what you have done or if it's the viable option considering it was working for you prior to PHP upgrade

FAQ 19 on official site outlines where your log files are particularly /var/log/messages is where blocked connections may end up being logged. So you can try sending again and if blocked immediately check the /var/log/messages

Code:

tail -100 /var/log/messages

you may have other legit blocked connections by CSF Firewall - CSF Firewall - CentminMod.com LEMP Nginx web stack for CentOS which is normal

or maybe grep filter on SRC=YOURSERVERIP to narrow the output

Code:

tail -100 /var/log/messages | grep SRC=YOURSERVERIP

or narrow by outgoing destination port DPT

Code:

tail -100 /var/log/messages | grep DPT=OUTGOINGPORT

 

maybe something silly Outgoing connections blocked - Sendy Forum ?

 

btw is this the curl test script you used ?

PHP:

<?php
    ini_set('display_errors', 1);
 
    echo file_get_contents_curl('https://sendy.co');
 
    //--------------------------------------------------------------//
    function file_get_contents_curl($url)
    //--------------------------------------------------------------//
    {
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_HEADER, 0);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
        $data = curl_exec($ch);
        return 'Response code: '.curl_getinfo($ch, CURLINFO_HTTP_CODE);
        curl_close($ch);
    }
?>

that connects to outgoing 443 port which is opened by default on Centmin Mod recent installs /etc/csf/csf.conf TCP_OUT= line should have 443 in comma separated list. However, very old installs had it missing so double check using below command

Code:

grep TCP_OUT /etc/csf/csf.conf | grep --color 443

I tested this curl script on a test PHP 5.6.13 Centmin Mod LEMP stack server and connects fine with 200 status response

however, doesn't explain why it worked prior to PHP upgrade if it is 443 port issue on TCP_OUT

 

Well the test curl script worked for me. Unfortunately, I do not use sendy.co script so can't help. @BamaStangGuy and @Andy are the only folks I know using sendy.co here so not sure if they'd have any clues for you.

 

sounds similar to @deltahf @Andy and @BamaStangGuy IPv6 connectivity issue that they had on reliablesite.net Timeouts when downloading resources via SSL/IPv6 and XF 1.4 - Trouble loading resources via SSL | XenForo Community

do you have IPv6 enabled ?

who's your web host ?

 

Try rebooting your linode and see if it fixes network connectivity first

 

what's contents of /etc/resolv.conf ?

 

linode is missing valid nameservers, just having the below should be all you need

Code:

nameserver 8.8.8.8
nameserver 8.8.4.4