Hello Hugo,

> The problem is when the clients try send a POST request, they try to
> connect directly to the back end server which has fake address (only
> known to the front end).

if the browser tries to send the POST data to the private IP obviously
the form's action or ajax setting is set to do so. Perhaps your
application hands out absolute URLs including a host-name resolving to
the private ip or the ip itself?

Regards
Manfred

Hi ,

Thank you for your answer, is there any way to confirm if the form is
using relative or absolute addresses?
>From what I can see (dump on the network the interface) after the POST
the back end server replies 302 with the absolute location off the
page,
including the internal address 192.168.0.77.

Dà è^@^Lè^@^M±ë^@P^Fo¼DD c#P^X^VÃk^@^@POST /
whtm_error_no_multiclient_support_form HTTP/1.0^M
Host: 192.168.0.77^M
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.8) Gecko/
20050511 Firefox/1.0.4^M
Accept: text/xml,application/xml,application/xhtml+xml,text/
html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5^M
Accept-Language: en-us,en;q=0.5^M
Accept-Encoding: gzip,deflate^M
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7^M
Referer: http://front_end_squid/^M
Content-Type: application/x-www-form-urlencoded^M
Content-Length: 36^M
Via: 1.1 tpsrv100.cern.ch:80 (squid/2.5.STABLE3)^M
X-Forwarded-For: 133.133.133.133^M
Cache-Control: max-age=0^M
Connection: keep-alive^M
^M
¶<86>ñE%¥^E^@Z^@^@^@Z^@^@^@^@^BUþ3õ^@0HR^Bä^H^@E^@ ^@L²^]@^@@^F^G
%è^@^Lè^@^M±ë^@P^Fo¾®D
c#P^X^VÃ[1m<8e>Ã^@^@htm_universalSubmit=Force
+Connecti^@^@^@Ã^@^@^@^@0HR^BÃ
¤^@^BUþ3õ^H^@E^T^@ÃfH^@^@<^F<96>lè^@^Mè^@^L^@P±ëD
c#^Fo¾ÃP^X^P^@^CI^@^@HTTP/1.1 302 Found^M
Location: http://192.168.0.77/US/En_US-En_US-1193584791/whtm_load_index.htm^M
Content-Length: 0^M
Server: Allegro-Software-RomPager/3.12^M

Is there any way to change this behavior externally without changing
the application ?

Thank you best regards
Hugo

On 10 Mrz., 10:10, "manfred.doh...@gmail.com"
wrote:
> Hello Hugo,
>
> > The problem is when the clients try send a POST request, they try to
> > connect directly to the back end server which has fake address (only
> > known to the front end).
>
> if the browser tries to send the POST data to the private IP obviously
> the form's action or ajax setting is set to do so. Perhaps your
> application hands out absolute URLs including a host-name resolving to
> the private ip or the ip itself?
>
> Regards
> Manfred