[squid-users] Problem authentication windows does not show

We are using squid 2.5.STABLE2. When I go to the site http://um0049.unimaas.nl there should appear an authentication window, but it doesn't. When I use the old ISA proxy it does. In the access.log the following message appears: TCP_MISS/401 151 GET http://um0049.unimaas.nl/produktie/wrd/run/prewframeusp1 - DIRECT/137.120.1.49. The site is on the exceptionsite list within dansguardian so it is not filtered.

Please help

j.roemen@lzr.nl

squid.conf
----------------------------------------------------------------------------
http_port 127.0.0.1:3120
#dansguardian connection port
cache_mem 512 MB
cache_swap_low 90
cache_swap_high 95
maximum_object_size 4096 KB
minimum_object_size 0 KB
maximum_object_size_in_memory 32 KB
ipcache_size 1024
ipcache_low 90
ipcache_high 95
fqdncache_size 1024
cache_replacement_policy lru
memory_replacement_policy lru
hierarchy_stoplist cgi-bin ?
acl QUERY urlpath_regex cgi-bin \?
no_cache deny QUERY
cache_dir ufs /squid/cache 10000 16 256
cache_access_log /squid/logs/access.log
cache_log /squid/logs/cache.log
cache_store_log /squid/logs/store.log
pid_filename /squid/squid.pid
log_fqdn off
#debug_options ALL,2
refresh_pattern ^ftp: 1440 20% 10080
refresh_pattern ^gopher: 1440 0% 1440
refresh_pattern . 0 20% 4320
acl all src 0.0.0.0/0.0.0.0
acl manager proto cache_object
acl localhost src 127.0.0.1/255.255.255.255
acl to_localhost dst 127.0.0.0/8
acl SSL_ports port 443 563 2000
acl Safe_ports port 80 # http
acl Safe_ports port 21 # ftp
acl Safe_ports port 22 # sftp
acl Safe_ports port 443 563 # https, snews
acl Safe_ports port 70 # gopher
acl Safe_ports port 210 # wais
acl Safe_ports port 1025-65535 # unregistered ports
acl Safe_ports port 280 # http-mgmt
acl Safe_ports port 488 # gss-http
acl Safe_ports port 591 # filemaker
acl Safe_ports port 777 # multiling http
acl Safe_ports port 2000 # qbase2000
acl CONNECT method CONNECT
follow_x_forwarded_for allow localhost
#follow_x_forwarded_for allow all
acl_uses_indirect_client off
http_access allow manager localhost
http_access deny manager
http_access deny !Safe_ports
http_access deny CONNECT !SSL_ports
http_access allow localhost
http_access deny all
http_reply_access allow all
icp_access allow all
cache_mgr j.roemen@lzr.nl
cache_effective_user nobody
visible_hostname proxy.lzr.nl
#follow_x_forwarded_for allow localhost
#acl_uses_indirect_client on
httpd_accel_port 3128
httpd_accel_host 194.151.226.35
httpd_accel_single_host on
httpd_accel_with_proxy on
logfile_rotate 10
coredump_dir /squid/cache
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Received on Tue Nov 23 2004 - 03:21:06 MST