Server :: Bridged Router / Modem Setup - Squid Transparent Proxy

May 19, 2010

I'm using a Debian box as a gateway. I'm planning on bridging my DLink 604T modem/router so that traffic on the LAN goes to my gateway (which only has one NIC). The Debian box is running a PPPoe application which I'm hoping to log into the ISP through the DLink. I plan to configure the box as a squid transparent proxy. Most Howtos I've seen use NAT with 2 NICs, eth0 for the LAN and eth1 for the Internet. Any step-through to set up NAT for this?

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Networking :: Transparent Squid Proxy Setup

May 6, 2011

I have set up squid3 and dhcp server on my Ubuntu 10.04 box with IP address of Single network card.Squid runs on port 3148. Everything works fine for the users provided that I set up the proxy details manually on each client pc.I want to set up the Squid to run as a transparent proxy and after reading around I have done the following.In the Squid3 conf file I have entered http_port 3148 transparent.Dropping to Root ( sudo -i )However the transparent proxy does not work and if I enter iptables -L I can see that the rule above has not been retained. The default rules in iptables only show up.

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General :: Squid As Transparent Proxy Server?

Jun 30, 2010

I am trying to install Squid 2.6 as Transparent proxy server.Can anyone provide the step by step configuration details

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Server :: SQUID 2.7.x And 3.1.x Won't Work As Transparent Proxy ?

Oct 16, 2010

I have installed and tried both squid version as transparent proxy but they just don't work.

I have eth0 which is where my internet comes in and eth1 which is my local network

My default firewall policy is to drop input output and forward, i have already set my firewall to accept and workout the squid and it is working.

Here is the relevant rules i have on my firewall:


Here is the sample conf i am using for squid:


Always_direct allow all When using version 2.7.x i was able to make it transparent when i used the below rules:


I readed the Docs on the squid page but the above rules can't be reproduced to 3.1 and i don't wish to use such rules to make it transparent or hidden so i want some help to figure out why it inst transparent.

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Server :: Transparent Proxy In Squid Not Functional

Jun 3, 2009

I am using Fedora 9, I have compile the squid with source code, i also deleted the old RPM of squid. i then edited the squid.conf in /usr/local/squid/etc and set http_port 3128 transparent and allowed in my acl to my local network but the transparent proxy is not working. if i remove transparent proxy then squid works fine. when i try to make it transparent the squid access.log file does not show any request coming to it (no activity). i have also forwarded all the incoming traffic to squid port 3128. Can anybody tell me why my transparent proxy is not functional.

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Server :: How To Configure Transparent Proxy In Squid-3.0 Staple 16

Jul 3, 2009

how to configure transparent proxy in squid-3.0-staple16? I install it with source code

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Server :: How To Configure Dansguardian On Squid Transparent Proxy?

Jun 11, 2009

can anyone give me the solution how to configure dansguardian on squid transparent proxy.i m using
linux - slackware
squid - squid-2.6-stable18
dansguardian -

squid transparent proxy is working properly.

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Server :: Make Squid 2.6 Stable As Transparent Proxy Server?

Dec 22, 2010

I want to make a transparent squid proxy server in centos. The squid proxy version is 2.6 stable. I made a normal squid server but want to make it transparent so that users do not need to enter the proxy settings in web browser. Even i searched about this on google but not getting it properly.I have two lan cards on centos system. ETH1 used for LAN and ETH2 used for WAN. And in this squid.conf i written "http_port transparent" and i also added a rule in iptables which is "iptables -t nat -A PREROUTING -i eth1 -p tcp --dport 80 -j REDIRECT --to-port 3128" but still i have to enter proxy settings at client's web browser to use internet

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Server :: Setup Squid As Non-transparent?

May 1, 2009

to configure squid as a non-transparent proxy? I understand https cannot be filtered using squid as a transparent proxy. So i need to find out how to configure squid for https filtering.

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Red Hat / Fedora :: Transparent Proxy With Squid

Apr 7, 2009

I am trying to configure squid with Fedora 10 to use it as a transparent proxy webcache.Is there any good tutorial you would recommend to a novice?

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Networking :: Squid As Local Transparent Proxy

Sep 28, 2009

I am trying to set up squid to make switching proxies easier. I have a laptop which I use at work and at home. At work, I need to connect to the internet via a authenticated proxy. At home, I connect directly to via mobile broadband. So I end up switching proxy settings twice daily, which is just irritating! To solve this I want to set up a system whereby I never have to worry about a proxy - my browser sees a direct internet connection which squid (on my computer) intercepts and forwards either to the mobile broadband connection or to the work proxy (along with the required authentication) depending on which is available. I've read various articles on how to do clever things with iptables and squid, but I don't understand enough of the networking jargon or concepts to know when I need to change to make it work in my situation, or if it is even possible.

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General :: How To Make Squid Proxy Transparent?

Apr 26, 2011

How to make squid proxy transparent?I have configured a Squid proxy server with some ACLs but we have to check from client side whether those ACLs work or not ,I have to open their firefox and manually enter my machine's i.e. proxy server's ip, only after entering this ip , Those ACLs work properly.But now I want to make it work without manually entering the proxy on clients machine.I guess transparent proxy is the solution, but how to configure it/Please guide me and I am one of the machine in LAN.

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General :: How To Make Squid Proxy Transparent

Apr 26, 2011

http_port 3128 transparent --> What does this mean? Is this a only thing we do to make Squid Proxy Transparent?

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General :: Squid Transparent Proxy Restriction

Jun 22, 2011

i m using centos 5.6 x86 give us guideline if possible, we have squid transparent proxy, the ip is set, this is as gateway we enter in window client pc to browse. now we want to block some website so we try below two method does not work, can you check if anything wrong in this, we enter this all starting of file squid.conf.

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General :: Transparent Proxy With Squid And Iptables Won't Log IPs From Lan

Aug 23, 2010

I just finished setup a proxy machine that runs in a separate box from gw.

I have the following iptables rule

on squid box



Here's an example


My question is how can i modify the iptables rules so it will forward the real ip's where the requests are originated from.

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General :: Transparent Squid Proxy In Ubuntu

Aug 11, 2010

I'm mon webmaster/developer and I'm new in Linux. Our office suddenly needs to setup a proxy server. Ubuntu Squid proxy server immediately came as an option for us. The question is: does transparent squid proxy configuration using Ubuntu will have no problem with computers running on Windows OS?

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Fedora Networking :: Transparent Proxy - Squid 3.1.10 - Wccp2

Aug 29, 2011

I've problem with configuring transparent proxy on Fedora v13 was checking with several examples, last one from here on router (cisco 1812) everything seems ok, think there is a problem with Linux

Squid machine and router 'see each other'


While try to open web page, on GRE there is:


But when want to see what hapenning in tunnel between router and squid - there nothing...squid configuration is ok - was checking before try to make it transparent.

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Networking :: Configuring Squid As Transparent Proxy In RHEL5?

Jun 11, 2009

Need a bit of help from the linux community. Lately, I have been trying to configure squid as transparent proxy on my server running on RHEL5. I had gone through few articles on web abt how to configure it and configured squid accordingly adding http_accel_xyz settings and then configuring the NAT using iptables. But while restarting squid there were warnings about "unrecognized: http_accel_..." in parseConfigFile.What I could get from these is that probably I need to recompile squid adding transparent proxy support. I downloaded the new squid 3.0 and tried to compile it.But unfortunately, the 'make' command fails giving library errors.I have been stuck with t now as the new squid does not compile and old one does not support the transparent mode.could compile the new one and what supporting libraries do I need to compile it successfully and also from where can

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Networking :: Iptables - Set Up Ip Table And A Transparent Squid Proxy

Nov 10, 2010

I need to set up an ip table and a transparent squid proxy as followed: I have 3 machine: Machine 1 works as a squid proxy. It has 2 interface eth1 and eth2.

eth1: (Connect to eth1 of machine 2)
eth2: (Connect to eth1 of machine 3)

machine 2 works as a webserver
machine 3 works as a web client.

my responsibility is to send all tcp traffic from machine 3 at port 80 to my squid proxy. In order to fulfill the tasks, I have edited the squid.conf as followed: Code: http_access allow localnet http_access allow localhost and in machine 1, I tried 2 ip tables command: Code: iptables -t nat -A PREROUTING -i eth2 -p tcp --dport 80 -j DNAT --to iptables -t nat -A PREROUTING -i eth1 -p tcp --dport 80 -j REDIRECT --to-port 80 I don't know if it is right or wrong.

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Networking :: Cant Finish My Transparent Squid 3.0 Proxy In Fedora 11

Dec 12, 2010

My skill in fedora linux is all acquired by reading online and trial and error. I manage to set up my squid 3.0 proxy server in fedora 11. It is working smoothly as I wanted it to be. I have one client who is running bittorrent that drags all the bandwidth of our network.The problem is I cant make my server work tranparently. I want to make transparent proxy so that it can support my wireless router and I want to control the bandwidth to a fair level for everyone without them knowing.

Please somebody help me configure iptables in step by step, specifically in fedora 11. And all other necessary configuration needed to run my transparent squid 3.0 proxy in fedora 11.I know there's a lot of Linux Genius here that can help. Please help me I needed it badly.

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General :: Multi-wan Configuration For Squid Transparent Proxy?

Jun 17, 2011

I have a network with two WAN links. One link is supposed to be for Senior Management and the other for the rest of the company. Currently all traffic seems to be going via one WAN link.

Is it possible to setup squid to select the link to use by checking the mac address of the requesting computer

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Debian Configuration :: Squid Transparent Proxy Https 443 Port?

Apr 26, 2011

I'm trying to get https/443 traffic go through squid.

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Fedora Networking :: Squid Transparent Proxy - Not Working - Error ?

May 1, 2009

I am using Fedora Core 9.0 and Squid Cache: Version 3.0.STABLE2 .

Now i am trying to use the squid as a proxy server but its not working its giving error like this ...

While trying to retrieve the URL: /

The following error was encountered:

Invalid URL Some aspect of the requested URL is incorrect.

Possible problems:

Here is my squid.conf

While trying to retrieve the URL: /

I have also try to forward the traffic coming on 3128 to 80 but its not working:

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Networking :: Squid And IPTABLES - Transparent Proxy Doesn't Work

Jan 12, 2011

I setup squid with transparent proxy and its working, however, when I reboot the server, the proxy server doesnt work unless I run the following.

Code: # squid server IP
# Interface connected to Internet
# Interface connected to LAN
# Squid port

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Software :: Squid Transparent Proxy Only For Static Info (.jpeg, Png Css Etc.)?

Feb 15, 2011

I am trying to fight problems with nfs on a loadbalanced webserver and sometimes when I get a ton of hits it seems that nfs is not quite able to handle the read requests and the load goes high on nodes. I will try to replace nfs soon with either gfs or glusterfs, but in the meanwhile I thought that it would be a lot better if there would not be so much traffic going on over any network file system.

So basically, I don know yet if it possible, but has any of you ever set up squid to be a cache server for static info like pictures and css only ? I really cant have squid cashing everything as html, since the site is very dynamic. I have 1 resource controller that serves all files for the nodes, a seperate sql server and loadbalanced nodes that handle only apache and APC atm. But I was thinking of adding squid transparent proxy caching on to them to have less traffic over nfs.

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CentOS 5 Networking :: OPEN Port In Squid Transparent Proxy

Jan 26, 2010

Here is my network diagram ADSL router----firewall--LAN inside the LAN my squid is running. currently all users are working with out proxy server. I installed the proxy server inside the LAN. now all users can access web browsing ,but no other ports are working , like POP3, smtp, then some other TCP port based applications are not working. My firewall ( juniper) is created and tested the rules to allow the POP3 and smtp and selected poprts which is working , but I redirected through squid proxy server the clients are not able to access. where do I have to create rules?

** in squid proxy( i already did in safe port list stillnot working)
** IP tables?

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Server :: Squid Access / Setup Automatically Get The Proxy Setting As Dhcp?

Jun 15, 2011

I my office I have configure dhcp in my centos sever
eth0 for adsl-setup
eth1 for lan
I am using squid proxy server for internet access,

in my office all are using laptop through wifi , so i need to configure the browser proxy setting for accessing internet.

is there any way to setup automatically get the proxy setting as dhcp. I have tried transparent proxy but no success.

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Fedora Networking :: Transparent Proxy With A Home Router?

Mar 8, 2010

I have set up many Dansguardian/Squid proxy servers. All of them have been on a network where I could use Microsoft Group Policies to force the proxy settings on each machine. The entire setup is quite easy, surprisingly robust, and reliable as hell.

My Dentist talked to me today and asked for something different. He wants to set his office up as a wireless hot spot for his patrons, and he wants their surfing directed through a proxy server. I plan on putting them on a completely different subnet and independent router. Now, since I won't have the convenience of GP I'm wondering if there is a way to force all internal Port 80 traffic through the Proxy server but obviously not the Proxy itself. I would like to use the router to do this and not the Linux box. Is there a low cost home router like Linksys or Netgear that will do this?

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Server :: Set Up Squid3 Proxy As A Transparent Proxy & Iptables Config

Feb 23, 2011

I am trying to set up my squid3 proxy as a transparent proxy - right now, I have to manually configure browsers to access via proxy. I understand that I have to put some rules into Iptables and also some further directives in the squid.conf.

I have a couple of specific questions. The proxy server is running on a Ubuntu 10.04 workstation and this machine also acts as a dhcp server for the network. I have just one subnet , namely There is only 1 network card. Is it much easier to put in a second network card or is it just as easy to configure the existing lan card as a dual IP?

Is it necessary to configure these 2 IP's ( whether they are via 2 lan cards or dual IP on single card ) to be on different subnets. i.e ETH0 and ETH1 or is ok to have something like ETH0 and ETH1 ( where ETH0 is the one facing the LAN and ETH1 points to the modem router / switch i.e The Internet ) Where specifically do I save the Iptables rule configuration file and what must I call it ?

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Ubuntu Servers :: Port Forwarding Setup Using IPTables - Transparent Proxy

May 13, 2010

I'm new to linux, but enjoy using it very much, especially without a GUI, console is fun! I need to set up port forwarding. We have 3 servers, 1x running Ubuntu server 8.04 (used as transparent proxy), 1x server 2003, 1x windows xp.

The linux box has the following ips:
eth0 (internal)
eth1 (external)

Windows server 2003:

Windows XP:


The router automatically forwards specific ports to (Linux eth0). From there I want to forward port 8585 to and 3000 to Is there a way that I can do this using iptables?

The commands that I think I'm gonna use look like this:
iptables -A FORWARD -s -p tcp --dport 8585 -d -j ACCEPT
iptables -A FORWARD -s -p tcp --dport 3000 -d -j ACCEPT

Would this be a correct way of doing it? My biggest problem is that I can't test it without going live, and if I go live and something doesn't work, the entire building will be left without internet, people will hate me. Also, The proxy captures all data on port 80 and forwards it to 3128 so that the proxy can monitor the usage, and a few systems runs fine with it, others however can ping websites, and internet explorer says "website found, waiting for reply" but the webpages cannot be displayed.

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