Configuring Squid Proxy server & Transparent Proxy

[Austin]

Hello , Finally I  get a Transparent Proxy running on a single machine , Thanks to the help of IRC

The method is simple , configure Squid for Transparent proxy by adding all necessary paramaters.

and the iptables command for it is

iptables -t nat -A OUTPUT -p tcp --dport 80 -m owner ! --uid-owner squid -j REDIRECT --to-port 3128

It works like a charm

Thanks
Austin

[lito]

i cant locate the       /usr/local/squid/etc/squid.conf

[Ricky]

sometimes its in /etc/squid/ .
You may try there.

[ruejos08]

EI thenitin we have the same problem. Did you already solve it? I have already up a dhcp server and internet proxy server(i used squid for the proxy). But when we try to access our POP3 mail server with the Microsoft Outlook Express, coz the clients were WinXP, I encountered a problem and I cant connect to the server. Our internet explorer works but the OutLook Express dont. Is there something to do with my squid configuration. Please help me on this. Godspeed!

[Ricky]

It is most common problem and can be solved by port forwarding. It has been discussed so many times and I am you will get benefitted from old discussion we had on this forum.

[ruejos08]

Ei Ricky can you give me some link to those forums. Thanks!

[Ricky]

See Port forwarding
and NAT
Internet Sharing using NAT

There are other numerous post and you find those in proxy section or General networking section.

[ruejos08]

Ei Ricky I encounter a problem when Im trying to create a cache dir with the code
/usr/local/squid/sbin/squid -z

Failed to make swap directory /usr/local/squid/var/cache: (13) Permission denied.

Please help me on this. Thanks!

[ruejos08]

Eniwei I am using Squid 2.6 STABLE.

[Ricky]

you have to see about permission structure, I have discussed same in this thread around page 4 or 6 . Kindly check that.

[Ricky]

Well. I have discussed here.. --> http://www.linuxsolved.com/forums/ftopic116-0-asc-45.html

[ruejos08]

Thanks a lot Ricky. I have tried all of your recommendations but still it does not solved my problem.

I have a Linux DHCP server and Proxy server with Microsoft Windows clients. We are using microsoft outlook express to access our mail server. But with the Linux Proxy server I have a problem connecting. The internet explorer was ok.

I found out the property and here are the details
Server Port Numbers
Our outgoing mail(SMTP) used port 25  and  our incoming mail(POP3) used port 110.
Our mail server is mail.inzpect.com.
While connecting here is the error.

The host'mail.inzpect.com' could not be found. Please verify that you have entered the server name correctly. Account: 'inzpect.com', Server: 'mail.inzpect.com', Protocol:POP3,Port: 110, Secure(SSL):no, Socket Error:11004,Error Number: 0x800CCC0d.

Please help me solve this. Thanks a lot.

[debasishg]

Ricky,

I have found your tutorial and accroding the tutorial, i have configured my squid proxy in my Mandriva linux. i have also used your squid.conf file and put my IPs there and it was successfully running.

I have 25 client PCs. Due to soe internal problem, we have taken a DSL connection with a public IP which is mapped with our default intranet. We need to make the proxy setup in the browser to access the server with basic authentication. im using win xp and running analogX proxy to use the connection with the clients. now i have decided to use Linux and squid. i'm successful to make the connection with the clients using squid. but unable to use the redirection to the proxy address of our server. after going thru the tutorial, i think i have to use this

Code: [Select]

cache_peer <IP ADDRESS> parent 3128 no-query


if it is OK, then i have some query regarding this.

1. where do i put this line in to squid.conf file?
2. we are having diff ports to access the server as

Code: [Select]


HTTP:  <IP ADDRESS> port: 808
SSL:    <IP ADDRESS> port: 808
FTP:     <IP ADDRESS> port: 2121
Socks: <IP ADDRESS> port: 1080

how can i define these. currectly we need only HTTP.

Basicaly is it something like using a proxy server for a proxy server. [server will user proxy IP and clients will use proxy to access the proxy.]

now all the clients can get connected to the internet via SQUID.

[Ricky]

put that line in begining mostly and squid handles all such request on one port so you don't need to define all such specially.

[arvindsony]

nice info