Hi Kristian
I'm not to sure if this has effects anyone else or has been discussed
before (can't find anything in the mail list).
I found a problem if the ISP uses a HTTP proxy. Inadyn updates Dynamic
DNS with the Proxy's IP, fortunately if the proxy is a transparent type
it provides the real IP in HTTP_XFORWARDED_FOR
REMOTE_ADDR = Proxy's IP
HTTP_VIA = Proxy's IP
HTTP_X_FORWARDED_FOR = YOUR IP (host making the HTTP request)
After a little investigation and thanks to
http://www.thepcspy.com/read/getting_the_real_ip_of_your_users#php I
created the following page http://getip.thatsgreat.com.au
<http://getip.thatsgreat.com.au/> which tests HTTP_XFORWARDED_FOR
(can't guarantee this will stay up), all worked well on my test box
after pointing inadyn to this new page.
If there's no adverse effect is it worth testing for
HTTP_X_FORWARDED_FOR on your http://getip.krisk.org/ site (thanks for
providing this service) for others
Sample
<?php
echo GetUserIP();
function GetUserIP() {
if (isset($_SERVER)) {
if (isset($_SERVER["HTTP_X_FORWARDED_FOR"]))
return $_SERVER["HTTP_X_FORWARDED_FOR"];
if (isset($_SERVER["HTTP_CLIENT_IP"]))
return $_SERVER["HTTP_CLIENT_IP"];
return $_SERVER["REMOTE_ADDR"];
}
if (getenv('HTTP_X_FORWARDED_FOR'))
return getenv('HTTP_X_FORWARDED_FOR');
if (getenv('HTTP_CLIENT_IP'))
return getenv('HTTP_CLIENT_IP');
return getenv('REMOTE_ADDR');
}
?>
Regards Guy
All, if you are interested in finding out if you're behind a proxy and
what type of proxy it is, go to
http://www.proxyblind.org/proxy_lookup.shtml (if its a Anonymous type
proxy I think your pretty much stuffed with automatically updating
Dyndns with inadyn)
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