Hello everybody, I'm not sure if it is a question of squid or my problem is because proxy.pac. We are using a pac file to redirect users of subnetA to proxyA, and users of subnetB to proxyB. Both proxies use NTLM auth. Trying to upload a document on to a web page through proxypac it doesn't ask for autentication, and it keeps thinking until error. When doing through proxyA or proxyB directly there is no problem. It happens with a few applications that ask for autentication (NTLM) before posting files. The access.log with proxy.pac: - manuel [16/Dec/2009:13:23:42 +0100] "GET http://catalogopatrimonio.meh.es/pctw/js/FuncionesComunes.js HTTP/1.1" 200 24139 TCP_REFRESH_UNMODIFIED:DEFAULT_PARENT - manuel [16/Dec/2009:13:23:46 +0100] "GET http://catalogopatrimonio.meh.es/pctw/org/org18.aspx HTTP/1.1" 200 53395 TCP_MISS:DEFAULT_PARENT - manuel [16/Dec/2009:13:23:46 +0100] "GET http://catalogopatrimonio.meh.es/pctw/js/scroll2.js HTTP/1.1" 304 632 TCP_REFRESH_UNMODIFIED:DEFAULT_PARENT - manuel [16/Dec/2009:13:23:46 +0100] "GET http://catalogopatrimonio.meh.es/pctw/js/FuncionesComunes.js HTTP/1.1" 304 632 TCP_REFRESH_UNMODIFIED:DEFAULT_PARENT - manuel [16/Dec/2009:13:23:53 +0100] "GET http://catalogopatrimonio.meh.es/pctw/org/org19_1.aspx? HTTP/1.1" 200 134945 TCP_MISS:DEFAULT_PARENT - manuel [16/Dec/2009:13:23:53 +0100] "GET http://catalogopatrimonio.meh.es/pctw/js/FuncionesComunes.js HTTP/1.1" 304 632 TCP_REFRESH_UNMODIFIED:DEFAULT_PARENT The access.log with ProxyA directly: - manuel [16/Dec/2009:13:34:00 +0100] "GET http://catalogopatrimonio.meh.es/pctw/js/FuncionesComunes.js HTTP/1.1" 304 629 TCP_REFRESH_UNMODIFIED:DEFAULT_PARENT - manuel [16/Dec/2009:13:34:03 +0100] "GET http://catalogopatrimonio.meh.es/pctw/org/org18.aspx HTTP/1.1" 200 53392 TCP_MISS:DEFAULT_PARENT - manuel [16/Dec/2009:13:34:04 +0100] "GET http://catalogopatrimonio.meh.es/pctw/js/scroll2.js HTTP/1.1" 304 629 TCP_REFRESH_UNMODIFIED:DEFAULT_PARENT - manuel [16/Dec/2009:13:34:04 +0100] "GET http://catalogopatrimonio.meh.es/pctw/js/FuncionesComunes.js HTTP/1.1" 304 629 TCP_REFRESH_UNMODIFIED:DEFAULT_PARENT - manuel [16/Dec/2009:13:34:09 +0100] "GET http://catalogopatrimonio.meh.es/pctw/org/org19_1.aspx? HTTP/1.1" 200 134934 TCP_MISS:DEFAULT_PARENT - manuel [16/Dec/2009:13:34:10 +0100] "GET http://catalogopatrimonio.meh.es/pctw/js/FuncionesComunes.js HTTP/1.1" 304 629 TCP_REFRESH_UNMODIFIED:DEFAULT_PARENT - - [16/Dec/2009:13:34:24 +0100] "GET http://catalogopatrimonio.meh.es/pctw/proxyAuthorize.aspx HTTP/1.1" 407 2161 TCP_DENIED:NONE - - [16/Dec/2009:13:34:47 +0100] "POST http://catalogopatrimonio.meh.es/pctw/org/org19_1.aspx? HTTP/1.1" 407 2949 TCP_DENIED:NONE - - [16/Dec/2009:13:34:47 +0100] "POST http://catalogopatrimonio.meh.es/pctw/org/org19_1.aspx? HTTP/1.1" 407 3242 TCP_DENIED:NONE - manuel [16/Dec/2009:13:34:48 +0100] "POST http://catalogopatrimonio.meh.es/pctw/org/org19_1.aspx? HTTP/1.1" 200 134952 TCP_MISS:DEFAULT_PARENT - manuel [16/Dec/2009:13:34:49 +0100] "GET http://catalogopatrimonio.meh.es/pctw/js/FuncionesComunes.js HTTP/1.1" 304 629 TCP_REFRESH_UNMODIFIED:DEFAULT_PARENT - - [16/Dec/2009:13:38:07 +0100] "GET http://catalogopatrimonio.meh.es/pctw/proxyAuthorize.aspx HTTP/1.1" 407 2161 TCP_DENIED:NONE - manuel [16/Dec/2009:13:38:19 +0100] "GET http://catalogopatrimonio.meh.es/pctw/proxyAuthorize.aspx HTTP/1.1" 200 1365 TCP_MISS:DEFAULT_PARENT - manuel [16/Dec/2009:13:38:20 +0100] "POST http://catalogopatrimonio.meh.es//pctw/GetFileUpload.aspx? HTTP/1.1" 200 683 TCP_MISS:DEFAULT_PARENT Any idea? Thanks a lot