transparent proxy, problema: squid, shorewall

[jangar <gianluca.gargiulo@gmail.com>]

Salve,

ho un problema con squid 2.5.stable9 usato come transparent proxy.
Usato come normale proxy, ovvero indicandolo escplicitamente al
browser (sia IE, sia Firefox) non ho nessun problema, mentre nel
configurare shorewall firewall 2.4.5 con le seguenti regole:

REDIRECT	loc	3128	tcp	www	-	!X.Y.Z.T
ACCEPT	$FW	net	tcp	www

ottengo la pagina
/**********************************************************************************************************\
ERROR
The requested URL could not be retrieved

While trying to retrieve the URL: /pagina.htm

The following error was encountered:

    * Invalid URL

Some aspect of the requested URL is incorrect. Possible problems:

    * Missing or incorrect access protocol (should be `http://'' or similar)
    * Missing hostname
    * Illegal double-escape in the URL-Path
    * Illegal character in hostname; underscores are not allowed

/**********************************************************************************************************\

sto cercando in giro per vedere di risolvere il problema, ma niente.
Qualcuno sa aiutarmi?

Grazie