[squid-users] (no subject)

[Yuri Voinov]

Squid 3.5.x?

24.06.15 17:59, Dalmar пишет:
> 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 <http://10.0.0.0/8># RFC1918 possible 
> internal network
> acl localnet src 192.168.0.0/16 <http://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:144020%10080
> refresh_pattern ^gopher:14400%1440
> refresh_pattern -i (/cgi-bin/|\?) 00%0
> refresh_pattern (Release|Packages(.gz)*)$      0       20%     2880
> refresh_pattern .020%4320
> cache_effective_user proxy
> cache_effective_group proxy
>
> ----------------------------------------
> I am really confused, can anyone guide me please.
> Thanks in advance
>
>
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