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I'm trying to get a Curl Response from an outside server, however I noticed I cant neither PING the server in question nor connect to it.

I tried disabling the iptables firewall but I had no success. My server is running behind a Cisco Linksys WRTN310N Router with the DD-wrt firmware Installed. In which I already disabled the firewall.

Here are my network settings: Ifconfig

eth0      Link encap:Ethernet  HWaddr 00:26:b9:76:73:6b
          inet addr:  Bcast:  Mask:
          inet6 addr: fe80::226:b9ff:fe76:736b/64 Scope:Link
          RX packets:49713 errors:0 dropped:0 overruns:0 frame:0
          TX packets:30987 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:52829022 (52.8 MB)  TX bytes:5438223 (5.4 MB)

lo        Link encap:Local Loopback
          inet addr:  Mask:
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:341 errors:0 dropped:0 overruns:0 frame:0
          TX packets:341 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:27604 (27.6 KB)  TX bytes:27604 (27.6 KB)




passwd:         compat
group:          compat
shadow:         compat

hosts:          files dns
networks:       files

protocols:      db files
services:       db files
ethers:         db files
rpc:            db files

netgroup:       nis


order hosts,bind
multi on

/etc/hosts       localhost       callcenter

# The following lines are desirable for IPv6 capable hosts
::1     ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters


# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto eth0
iface eth0 inet static

The Url to which im trying to get a connection to is When I ping it on terminal heres what I get

daniel@callcenter:~$ ping
ping: unknown host

daniel@callcenter:~$ ping
PING ( 56(84) bytes of data.

--- ping statistics ---
2 packets transmitted, 0 received, 100% packet loss, time 1007ms

PHP Function in codeigniter

public function authorizePayment(){
    // Authorize a payment

        // Get variables from POST array
        $post_str = "action=payment&business="      .urlencode($this->input->post('business'))
                    ."&vericode="                   .urlencode($this->input->post('vericode'))
                    ."&item_name="                  .urlencode($this->input->post('item_name'))
                    ."&item_code="                  .urlencode($this->input->post('item_code'))
                    ."&quantity="                   .urlencode($this->input->post('quantity'))
                    ."&amount="                     .urlencode($this->input->post('amount'))
                    ."&cc_type="                    .urlencode($this->input->post('cc_type'))
                    ."&cc_number="                  .urlencode($this->input->post('cc_number'))
                    ."&cc_expdate="                 .urlencode($this->input->post('cc_expdate_year')).urlencode($this->input->post('cc_expdate_month'))
                    ."&cc_security_code="           .urlencode($this->input->post('cc_security_code'))
                    ."&shipment="                   .urlencode($this->input->post('shipment'))
                    ."&first_name="                 .urlencode($this->input->post('first_name'))
                    ."&last_name="                  .urlencode($this->input->post('last_name'))
                    ."&address="                    .urlencode($this->input->post('address'))
                    ."&city="                       .urlencode($this->input->post('city'))
                    ."&state_or_province="          .urlencode($this->input->post('state_or_province'))
                    ."&zip_or_postal_code="         .urlencode($this->input->post('zip_or_postal_code'))
                    ."&country="                    .urlencode($this->input->post('country'))
                    ."&shipping_address="           .urlencode($this->input->post('shipping_address'))
                    ."&shipping_city="              .urlencode($this->input->post('shipping_city'))
                    ."&shipping_state_or_province=" .urlencode($this->input->post('shipping_state_or_province'))
                    ."&shipping_country="           .urlencode($this->input->post('shipping_country'))
                    ."&phone="                      .urlencode($this->input->post('phone'))
                    ."&email="                      .urlencode($this->input->post('email'))
                    ."&ip_address="                 .urlencode($this->input->post('ip_address'))
                    ."&website_unique_id="          .urlencode($this->input->post('website_unique_id'));

                    // Send URL string via CURL
                    $backendUrl = "";
                    $return = $this->curl->execute();

                    $result = array();
                    // Explode array where blanks are found
                    $resparray = explode(' ', $return);

                    if ($resparray)
                      // save results into an array
                      foreach ($resparray as $resp) {
                        $keyvalue = explode('=', $resp);
                        $result[$keyvalue[0]] =  str_replace('"', '', $keyvalue[1]);
                    return $result;


This gets an empty result array. This function however works well in the previous server where the script was hosted before. No modifications where made whatsoever

Thanks in Advance

share|improve this question

1 Answer 1

The server at (or their firewall in front of it) is configured to discard ping requests.

C:\Users\RGB> ping

Pinging [] with 32 bytes of data:
Request timed out.
Request timed out.
Request timed out.
Request timed out.

Ping statistics for
    Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),

It responds to HTTP requests:

C:\Users\RGB> wget
           => `index.html.1'
Resolving done.
Connecting to[]:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: unspecified [text/html]

    [ <=>                                 ] 922          900.39K/s

22:34:37 (900.39 KB/s) - `index.html.1' saved [922]


For an outbound HTTP request you shouldn't need to disable any firewall in your router.


You are using lib_curl from PHP, but in a way I don't recognise.

Other PHP examples of curl use functions like curl_init() and curl_exec()

I suspect you need to dump out what you are sending (the post data), compare PHP versions and amend the code to check for error responses.

I don't know how you'd do that with the library you are using, with other PHP curl libs you do something like this:

if (curl_errno($ch)) {
 print curl_error($ch);
} else {

I'd update the PHP script with something equivalent.

My guess is your PHP version and environment is not the same as it was on your old server.

share|improve this answer
so does this mean its an issue with Curl? –  Daniel Adarve Mar 25 '12 at 21:39
@Daniel: I doubt there's anything wrong with curl. Can you edit your question and cut and paste your curl command and it's output at the end? –  RedGrittyBrick Mar 25 '12 at 21:41
Sure one sec. thanks –  Daniel Adarve Mar 25 '12 at 21:42
I was working on a paid server on, basically we want to have this script in a local server so I bought a Dell Server and installed Ubuntu on it. It must be something with the Ubuntu configuration. –  Daniel Adarve Mar 25 '12 at 21:47

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