[squid-users] (no subject)

[Dalmar]

Hi,
For over two weeks i am having a really headache in configuring squid
transparent/intercept.
I have tried different options and configurations but i couldn't get it to
work.
i think the problems lies in the Iptables / NAT but i really couldn't solve
it.
I have tried different iptable rules including the intercept linuxDnat -
sysctl configuration, but didnt work.

# your proxy IP
SQUIDIP=X.X.X.X

# your proxy listening port
SQUIDPORT=XXXX


iptables -t nat -A PREROUTING -s $SQUIDIP -p tcp --dport 80 -j ACCEPT
iptables -t nat -A PREROUTING -p tcp --dport 80 -j DNAT --to-destination
$SQUIDIP:$SQUIDPORT
iptables -t nat -A POSTROUTING -j MASQUERADE
iptables -t mangle -A PREROUTING -p tcp --dport $SQUIDPORT -j DROP


i have to say that squid works well when i configure in the client browsers.

at the mikrotik side, i am using DST-NAT chain port 80 pro TCP action
DST-NAT to address squidIP and Port

i am using ubuntu server 15.04 using squid 3.3.8 and this is my
configuration and the errors i get:


                       ------ eth0 WAN <----- MAIN WAN Public IP Internet
                 MK---|
                           ------ eth1 LAN
                          |
                   ------ eth2 Proxy


         ------ eth0 WAN ---> Public IP --> Internet --> gets internet from
24online / another Mikrotik
      Squid---|
                        ------ eth1 Proxy
       |
        ------ eth2 webmin --> For server Management


-error1: if no intercept/transparent and no iptables is configured
-Invalid URL -  The requested url could not be retrieved
-but if proxy is configured in the user browser - it works!


-error2:if intercept and iptable DNAT is configured
-Access Denied and in the access log TCP-MISS/403
-no forward proxy port configured
        -security alert : host header forgery detected on local=
SquidIP:8080 remote:mikrotikIP (local ip does not match any domain name)
        -warning : forwarding loop detected (x-Forwarded-for mikrotik lan
IP)

squid.conf

acl localnet src 10.0.0.0/8 # RFC1918 possible internal network
acl localnet src 192.168.0.0/16 # RFC1918 possible internal network
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 CONNECT method CONNECT
http_access deny !Safe_ports
http_access deny CONNECT !SSL_ports
http_access allow localhost manager
http_access deny manager
http_access allow localnet
http_access allow localhost
http_access deny all
http_port 8080
http_port 8181
cache_mem 2000 MB
cache_dir ufs /var/spool/squid3 100000 16 256
coredump_dir /var/spool/squid3
refresh_pattern ^ftp: 1440 20% 10080
refresh_pattern ^gopher: 1440 0% 1440
refresh_pattern -i (/cgi-bin/|\?) 0 0% 0
refresh_pattern (Release|Packages(.gz)*)$      0       20%     2880
refresh_pattern . 0 20% 4320
cache_effective_user proxy
cache_effective_group proxy

----------------------------------------
I am really confused, can anyone guide me please.
Thanks in advance
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.squid-cache.org/pipermail/squid-users/attachments/20150624/c78237ae/attachment.html>