fsockopen and firewall !!!

Anon

Just a litlle newbie question..

I have this code to get the HEAD of a file, it works fine on my own
host.
But when I try at my ISP host it fails.

Is it because my ISP uses a firewall
and how do I make a workaround for this ?

$fp = fsockopen($host, 80, &$errno, &$errstr, 30);

fputs($fp,"HEAD $urlcheck HTTP/1.1\r\n");
fputs($fp,"HOST: dummy\r\n");
fputs($fp,"Connection: close\r\n\r\n");

while (!feof($fp)) {
$test = sprintf("%s%s", $test, fgets($fp,128));
}

Thanks for any replies !!

Anon

You got to make the PHP script use the proxy insted of accessing the page directly

Andreas

Anon

What are the change that my ISP will give me their proxy settings hehe. Is this the only way to do this ?

Anon

fsocketopen() the proxy server.. then send this:

fputs ($fp, "GET http://www.thesite.com/thedir/thefile.html HTTP/1.0\r\n"
. "Host: http://www.thesite.com:80\r\n"
. "User-agent: PHP/proxyget http 0.1\r\n"
. "\r\n");

This will work through a proxy...

Andreas

Anon

Do I need the proxy settings for the fsocketopen() ?

Anon

Is there a way to detect the proxy settings. Maybe through some global phpproxy variable ?

Anon

No... I dont think so... a usuall web proxy address is like.. webproxy.isp.com:8080

This is pretty usuall.. it might be what your lookingfor

Andreas

Anon

If your ISP has disabled outbound connections, you are out of luck. Get a better ISP.

There also is an error in your code. You are sending an HTTP 1.1 query. In order to retrieve data (not just discover whether the IP address is alive) you must pass a valid hostname with that query, not "dummy." That is how HTTP 1.1 supports name-based virtual servers, which are rapidly becoming the dominant mode of addressing for smaller Web sites. The hostname and the URI together are used to determine which document to serve.

Anon

Hmmm disabled outbound connections, sounds like the case then 😉

Thanks for that dummy error