Re: [squid-users] Local Squid

I remeber trying this kind of stuff before but the better option is to
use the forward_proxy settings.
the basic http_proxy works kind of fine for most apps.
on what OS are you trying to do so?
In a flight I would read a book or offline content since it's a flight
and I will want to do something else but.. this is my angle.

Eliezer

On 09/23/2013 02:20 AM, Shawn Wilson wrote:
>
>
> Eliezer Croitoru <eliezer_at_ngtech.co.il> wrote:
>> Hey,
>>
>> I wont ask why do you need it but you need to first allow (ACCEPT) the
>> UID of the proxy user and then intercept the local port 80 traffic
>>
>> iptables -t nat -A OUTPUT -m owner --uid-owner 31 -j ACCEPT
>> iptables -t nat -A OUTPUT -p tcp --dport 80 -j REDIRECT --to-port 3129
>>
>> (ALLL THE ABOVE is only if the UID of the proxy user is 31..
>
> Yeah, that's what I have. I split it up because the former is what I was looking at a cli to enable it and the later is iptables-save without counters (-c iirc). I guess it added confusion - sorry.
>
>>
>> if it's on the local machine why do you need exactly to intercept the
>> traffic?(curios)?
>
> Mainly for better traffic monitoring but also to have a minimal local cache when on a plane, to learn squid, to play with webapps.
>
>>
>> and try with 3.3.8 to use:
>> http_port 127.0.0.1:3128
>> http_port 3129 intercept
>> just to make sure that there is no collision between the two purposes
>> of
>> the port.
>>
> Hummm, didn't know about intercept. I've tried both with and without transparent on 3128 (though I'm not sure how this is supposed to work without transparent as I'm only passing it a url and not http://proxy/url?
>
>
>> Eliezer
>>
>> On 09/22/2013 03:58 PM, shawn wilson wrote:
>>> 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 Mon Sep 23 2013 - 03:39:17 MDT