[SOLVED] Problem Deploying SQUID as Transparent Proxy Server on CentOS 6.4

Why did you have to configure and make squid instead of an rpm package?

by the way now I've compiled the squid proxy server from source code...

It's been years (and years)since I have had to do that for squid.

Still looking.....

this string...

echo 1 > /proc/sys/net/ipv4/ip_forward

will not stick on reboot, the /etc/sysctl.conf file takes care of that, you may be switching it off with the /etc/sysctl.conf script.

for now....

Why did you have to configure and make squid instead of an rpm package?

because I want to learn and fix the issue...

Now I've decided to uninstall teh squid and only configure iptables either is it working or not...I've watched one video series on youtube I'll follow it step by step. if I am not wrong I am still stick with my words that culprit could be or is "iptables"...so I will uninstall squid and only configure the iptables ad let the client pass through it lets see what happened...

here is the link I am going to follow...
https://www.youtube.com/watch?v=zG51...lbRwkZ-X968wVI

Successful!
after a long struggle at last I got the one step success...
I didn't install SQUID and decide to share internet via iptables either is it work or not...

I followed this link..

https://www.centos.org/modules/newbb...topic_id=42474

from there these commands works for me...


/sbin/iptables -A FORWARD -i eth1 -o eth0 -m state --state ESTABLISHED,RELATED -j ACCEPT
/sbin/iptables -t nat -A POSTROUTING -s 192.168.0.0/24 -o eth0 -j MASQUERADE
/sbin/iptables-save > /etc/sysconfig/iptables
/sbin/service iptables restart

I've also set ip_forward to 1 in two places...

echo 1 > /proc/sys/net/ipv4/ip_forward

and

sysctl -w net.ipv4.ip_forward=1

then restarted the centOS 6.4 server and I am done!

I am very happy but now I would like to install SQUID Proxy Binary Package and would configure it as transparent PROXY SERVER.thats what I want...

Hi, you might find that iptables will complain....

 state --state

no longer supported...depreciated...

any where you see it in iptables script, replace it with

 conntrack --ctstate

So far, so good.

Thanks Buddy! your given command

conntrack --ctstate

is working too. I am going to play with SQUID in next few days.

Hurrrry!
Thanks God! after a long ad long struggle now I am able to deploy SQUID as Transparent proxy server below is a rule set for iptables that works for me all other configuration remains same as above(previously posted)..

iptables -t nat -A PREROUTING -i eth1 -p tcp --dport 80 -j DNAT --to 192.168.0.253:3128 iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 80 -j REDIRECT --to-port 3128 iptables -I INPUT -s 192.168.0.0/16 -p tcp --dport 3128 -j ACCEPT

now I only have to set up 192.168.0.253 as gate on client machine that works for me.

I really thank you all who consider my post and gave comments and suggestions thank you all.

Thank you, I'm glad you got it working.

Please mark your post as SOLVED. (thread tools)

Hi this is my config... help me with your solutions

#
# Recommended minimum configuration:
#
acl manager proto cache_object
acl localhost src 127.0.0.1/32 ::1
acl to_localhost dst 127.0.0.0/8 0.0.0.0/32 ::1
acl lan src 10.15.12.0/24
# 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 SSL_ports port 403
acl SSL_ports port 995
acl Safe_ports port 80 # http
acl Safe_ports port 21 # ftp
acl Safe_ports port 23 #telnet
acl Safe_ports port 22 #Putty
acl Safe_ports port 53 # for dns
acl Safe_ports port 210 # ftp
acl Safe_ports port 488 # https
acl Safe_ports port 591 # gopher
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 995 #pop3
acl Safe_ports port 2525 #smtp
acl CONNECT method CONNECT

#
# Recommended minimum Access Permission configuration:
#
# Only allow cachemgr access from localhost
http_access allow manager localhost
http_access deny manager

# Deny requests to certain unsafe ports
http_access allow CONNECT SSL_ports
http_access allow CONNECT Safe_ports
http_access deny !Safe_ports

# Deny CONNECT to other than secure SSL ports
http_access deny CONNECT !SSL_ports

# 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
http_access allow lan
# And finally deny all other access to this proxy
http_access deny all

# Squid normally listens to port 3128
#http_port 3128 transparent
http_port 3128 intercept

# We recommend you to use at least the following line.
hierarchy_stoplist cgi-bin ?

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

# 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

visible_hostname localhost.localdomain




"/etc/squid/squid.conf" 92L, 3010C

and my iptables are

Table: nat
Chain PREROUTING (policy ACCEPT)
num target prot opt source destination
1 DNAT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:80 to:10.15.12.1:3128
2 REDIRECT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:80 redir ports 3128

Chain POSTROUTING (policy ACCEPT)
num target prot opt source destination

Chain OUTPUT (policy ACCEPT)
num target prot opt source destination

Table: filter
Chain INPUT (policy ACCEPT)
num target prot opt source destination
1 ACCEPT tcp -- 10.15.12.0/24 0.0.0.0/0 tcp dpt:3128

Chain FORWARD (policy ACCEPT)
num target prot opt source destination

Chain OUTPUT (policy ACCEPT)
num target prot opt source destination