LinuxQuestions.org - Can't get dansguardian with squid to work - The requested URL could not be retrieved

Hello.
I am trying to configure squid proxy to run along dansguardian filter. The squid proxy and the DansGuardian filter are located on a netbook, which is connected to my pc through 2 routers and a bridge. Here are my iptables:

Code:

 

*filter

:INPUT DROP [0:0]

:FORWARD ACCEPT [0:0]

:OUTPUT ACCEPT [0:0]

-A INPUT -p icmp -j ACCEPT

-A INPUT -i lo -j ACCEPT

# ssh

-A INPUT -p tcp -m tcp --dport 22 -j ACCEPT

# dansguardian

-A INPUT -i p33p1 -p tcp --dport 8080 -j ACCEPT

# squid

-A INPUT -i p33p1 -p tcp --dport 3128 -j ACCEPT

# ts3

-A INPUT -p tcp --dport 30033 -j ACCEPT

-A INPUT -p tcp --dport 10011 -j ACCEPT

-A INPUT -p udp --dport 9987 -j ACCEPT

# related streams

-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT

#-A INPUT -j LOG --log-prefix "DROPPED_INPUT: "

COMMIT

*nat

:PREROUTING ACCEPT [29920:4472079]

:POSTROUTING ACCEPT [1268:86089]

:OUTPUT ACCEPT [1310:88657]

# opendns

-A PREROUTING -i p33p1 -p udp --dport 53 -j DNAT --to-destination 208.67.222.123:53

# dansguardian routing

-A OUTPUT -p tcp --dport 80 -m owner --uid-owner squid -j ACCEPT

-A OUTPUT -p tcp --dport 3128 -m owner --uid-owner squid -j ACCEPT

-A OUTPUT -p tcp --dport 80 -m owner --uid-owner dansguardian -j ACCEPT

-A OUTPUT -p tcp --dport 3128 -m owner --uid-owner dansguardian -j ACCEPT

-A OUTPUT -p tcp --dport 80 -j REDIRECT --to-ports 8080

-A OUTPUT -p tcp --dport 3128 -j REDIRECT --to-ports 8080

-A PREROUTING -i p33p1 -p tcp --dport 80 -j REDIRECT --to-port 8080

# squid routing

-A PREROUTING -i p33p1 -p tcp --dport 80 -j REDIRECT --to-port 3128

# NAT

-A POSTROUTING -s 192.168.0.0/16 -j MASQUERADE

-A POSTROUTING -s 10.0.0.0/16 -j MASQUERADE

-A POSTROUTING -s 172.16.34.252/30 -j MASQUERADE

COMMIT

And here's my squid.conf:

Code:

#

# Recommended minimum configuration:

#



# Example rule allowing access from your local networks.

# Adapt to list your (internal) IP networks from where browsing

# should be allowed

acl localnet src 10.0.0.0/8    # RFC1918 possible internal network

acl localnet src 172.16.0.0/12  # RFC1918 possible internal network

acl localnet src 192.168.0.0/16 # RFC1918 possible internal network

acl localnet src 127.0.0.0/8

acl localnet src fc00::/7      # RFC 4193 local private network range

acl localnet src fe80::/10      # RFC 4291 link-local (directly plugged) machines

acl localhost src 127.0.0.1/32



acl SSL_ports port 443

acl Safe_ports port 80          # http

acl Safe_ports port 21          # ftp

acl Safe_ports port 443        # https

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 CONNECT method CONNECT



#acl bdomains dstdomain "/etc/squid/blocked.domains.acl"

#http_access deny bdomains



#

# Recommended minimum Access Permission configuration:

#

# Deny requests to certain unsafe ports

#http_access deny !Safe_ports



# Deny CONNECT to other than secure SSL ports

#http_access deny CONNECT !SSL_ports



# Only allow cachemgr access from localhost

#http_access allow localhost manager

#http_access deny manager





#debug_options 28,9



# We strongly recommend the following be uncommented to protect innocent

# web applications running on the proxy server who think the only

# one who can access services on "localhost" is a local user

#http_access deny to_localhost



#

# INSERT YOUR OWN RULE(S) HERE TO ALLOW ACCESS FROM YOUR CLIENTS

#



# Example rule allowing access from your local networks.

# Adapt localnet in the ACL section to list your (internal) IP networks

# from where browsing should be allowed

http_access allow localnet

http_access allow localhost



# And finally deny all other access to this proxy

http_access allow all



# Squid normally listens to port 3128

http_port 3128 transparent

#http_port 3128 intercept

http_port 3128



# Uncomment and adjust the following to add a disk cache directory.

# Leave coredumps in the first cache dir

coredump_dir /var/spool/squid



#

# Add any of your own refresh_pattern entries above these.

#

refresh_pattern ^ftp:          1440    20%    10080

refresh_pattern ^gopher:        1440    0%      1440

refresh_pattern -i (/cgi-bin/|\?) 0    0%      0

refresh_pattern .              0      20%    4320

When the entry corresponding to the dansguardian routing in iptables is hashed out - the internet works fine.

Code:

# -A PREROUTING -i p33p1 -p tcp --dport 80 -j REDIRECT --to-port 8080

When it isn't - Dansguardian seems to block blacklisted sites, but when I try to access normal sites I get the "The requested URL could not be retrieved" and "Access denied" error from squid (not Dansguardian). I tried configuring squid.conf and iptables by trial and error method without any luck. Squid without dansguardian works fine - it allows me to access sites, but when dansguardian is turned on I cannot access the internet because of the access denied error that squid is giving me. What changes should I make to above files? Please help.