[squid-users] Local Squid

I'm trying to setup a transparent proxy on my local machine. This
works when I give Firefox proxy info, but this fails when I get
iptables to redirect with (the rule I keep turning on/off):
iptables -t nat -A OUTPUT -p tcp --dport 80 -j REDIRECT --to-port 3128

And the rest of the nat table is just:
*nat
-A OUTPUT -m owner --uid-owner 31 -j ACCEPT
COMMIT

When this is enabled, I just get:
ERROR

The requested URL could not be retrieved

and "Invalid URL"
Which is a squid message and I'm seeing the requests in the access log
but I'm guessing something needs to be rewritten that isn't or squid
is doing too much.

swlap1 ~ # squid -v
Squid Cache: Version 3.3.8
configure options: '--prefix=/usr' '--build=x86_64-pc-linux-gnu'
'--host=x86_64-pc-linux-gnu' '--mandir=/usr/share/man'
'--infodir=/usr/share/info' '--datadir=/usr/share' '--sysconfdir=/etc'
'--localstatedir=/var/lib' '--libdir=/usr/lib64'
'--disable-dependency-tracking' '--sysconfdir=/etc/squid'
'--libexecdir=/usr/libexec/squid' '--localstatedir=/var'
'--with-pidfile=/run/squid.pid' '--datadir=/usr/share/squid'
'--with-logdir=/var/log/squid' '--with-default-user=squid'
'--enable-removal-policies=lru,heap'
'--enable-storeio=aufs,diskd,rock,ufs' '--enable-disk-io'
'--enable-auth'
'--enable-auth-basic=MSNT,MSNT-multi-domain,NCSA,POP3,getpwnam,PAM'
'--enable-auth-digest=file' '--enable-auth-ntlm=none'
'--enable-auth-negotiate=none'
'--enable-external-acl-helpers=file_userip,session,unix_group'
'--enable-log-daemon-helpers' '--enable-url-rewrite-helpers'
'--enable-cache-digests' '--enable-delay-pools' '--enable-eui'
'--enable-icmp' '--enable-follow-x-forwarded-for' '--enable-esi'
'--with-large-files' '--disable-strict-error-checking'
'--without-libcap' '--enable-ipv6' '--disable-snmp' '--enable-ssl'
'--disable-ssl-crtd' '--disable-icap-client' '--disable-ecap'
'--enable-linux-netfilter' 'build_alias=x86_64-pc-linux-gnu'
'host_alias=x86_64-pc-linux-gnu' 'CC=x86_64-pc-linux-gnu-gcc'
'CFLAGS=-march=native -freorder-blocks-and-partition -O2 -pipe'
'LDFLAGS=-Wl,-O1 -Wl,--as-needed' 'CXXFLAGS=-march=native
-freorder-blocks-and-partition -O2 -pipe'
'PKG_CONFIG_PATH=/usr/lib64/pkgconfig'

/etc/squid/squid.conf:

#
# 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 fc00::/7 # RFC 4193 local private network range
acl localnet src fe80::/10 # RFC 4291 link-local (directly
plugged) machines

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 Safe_ports port 901 # SWAT
acl CONNECT method CONNECT

#
# 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

# 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
#
acl localhost src 127.0.0.1/32 ::1
acl to_localhost dst 127.0.0.0/8 0.0.0.0/32 ::1

# 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 deny all

# Squid normally listens to port 3128
http_port 3128 transparent

# Uncomment and adjust the following to add a disk cache directory.
#cache_dir ufs /var/cache/squid 100 16 256

# Leave coredumps in the first cache dir
coredump_dir /var/cache/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
Received on Sun Sep 22 2013 - 12:59:14 MDT