curltester.php is on my site, I ran it again, it's lengthy:
Testing communications to various destinations. This is a simple diagnostic to determine whether your server can connect to common destinations.
For advanced "details" mode, add ?details=on to the URL.
Connecting to Zen Cart Support Server (http) ...
Error 6: Could not resolve host: https://www.zen-cart.com
Connecting to Zen Cart Support Server (https) ...
Error 6: Could not resolve host: https://www.zen-cart.com
Connecting to USPS (port 80)...
Error 6: Could not resolve host: production.shippingapis.com
Connecting to USPS Test/Staging/Sandbox Server (port 80)...
Error 28: Resolving timed out after 5514 milliseconds
Connecting to UPS (port 80)...
Warning: fsockopen(): php_network_getaddresses: getaddrinfo failed: Temporary failure in name resolution in /home/theenc/public_html/shop/extras/curltester.php on line 179
Warning: fsockopen(): unable to connect to www.ups.com:80 (php_network_getaddresses: getaddrinfo failed: Temporary failure in name resolution) in /home/theenc/public_html/shop/extras/curltester.php on line 179
Error Num: 0, Message: php_network_getaddresses: getaddrinfo failed: Temporary failure in name resolution
Connecting to UPSXML (SSL) (wwwcie.ups.com) ...
Error 6: Could not resolve host: wwwcie.ups.com
Connecting to UPSXML (SSL) (https://www.ups.com) ...
Error 6: Could not resolve host: https://www.ups.com
Connecting to UPSXML (SSL) (onlinetools.ups.com) ...
Error 6: Could not resolve host: onlinetools.ups.com
Connecting to FedEx (port 80)...
Warning: fsockopen(): php_network_getaddresses: getaddrinfo failed: Temporary failure in name resolution in /home/theenc/public_html/shop/extras/curltester.php on line 179
Warning: fsockopen(): unable to connect to fedex.com:80 (php_network_getaddresses: getaddrinfo failed: Temporary failure in name resolution) in /public_html/shop/extras/curltester.php on line 179
Error Num: 0, Message: php_network_getaddresses: getaddrinfo failed: Temporary failure in name resolution
Connecting to PayPal IPN (port 443)...
Warning: fsockopen(): php_network_getaddresses: getaddrinfo failed: Temporary failure in name resolution in /public_html/shop/extras/curltester.php on line 179
Warning: fsockopen(): unable to connect to www.paypal.com:443 (php_network_getaddresses: getaddrinfo failed: Temporary failure in name resolution) in /public_html/shop/extras/curltester.php on line 179
Error Num: 0, Message: php_network_getaddresses: getaddrinfo failed: Temporary failure in name resolution
Error 6: Could not resolve host: https://www.paypal.com
Connecting to PayPal IPN (port 443) Sandbox ...
Warning: fsockopen(): php_network_getaddresses: getaddrinfo failed: Temporary failure in name resolution in /public_html/shop/extras/curltester.php on line 179
Warning: fsockopen(): unable to connect to www.sandbox.paypal.com:443 (php_network_getaddresses: getaddrinfo failed: Temporary failure in name resolution) in /public_html/shop/extras/curltester.php on line 179
Error Num: 0, Message: php_network_getaddresses: getaddrinfo failed: Temporary failure in name resolution
Error 6: Could not resolve host: https://www.sandbox.paypal.com
Connecting to PayPal Express/Pro Server ...
Error 6: Could not resolve host: api-3t.paypal.com
Connecting to PayPal Express/Pro Sandbox ...
Error 6: Could not resolve host: api-3t.sandbox.paypal.com
Connecting to PayPal Payflowpro Server ...
Error 6: Could not resolve host: payflowpro.paypal.com
Connecting to AuthorizeNet Production Server ...
Error 6: Could not resolve host: secure.authorize.net
Connecting to AuthorizeNet Developer/Sandbox Server ...
Error 28: Resolving timed out after 5513 milliseconds
Connecting to First Data GGe4 server (SSL)...
Error 6: Could not resolve host: checkout.globalgatewaye4.firstdata.com
Connecting to LinkPointAPI server (port 1129)...
Error 28: Resolving timed out after 5514 milliseconds
Testing completed. See results above.