squid3 tproxy on ubuntu 10.10 How to

tproxy on ubuntu 10.10 How to
Refer  http://wiki.squid-cache.org/Features/Tproxy4



echo 2 > /proc/sys/net/ipv4/conf/default/rp_filter
echo 2 > /proc/sys/net/ipv4/conf/all/rp_filter
modprobe ip_tables
modprobe iptable_filter
modprobe ipt_TPROXY
modprobe ipt_tproxy

=======================

config on /etc/sysctrl.conf
net.ipv4.conf.default.rp_filter=2
net.ipv4.conf.all.rp_filter=2
net.ipv4.ip_forward=1

=============================

Add in /etc/rc.local

ip rule add fwmark 1 lookup 100
ip route add local 0.0.0.0/0 dev lo table 100
iptables -t mangle -N DIVERT
iptables -t mangle -A PREROUTING -p tcp -m socket -j DIVERT
iptables -t mangle -A DIVERT -j MARK --set-mark 1
iptables -t mangle -A DIVERT -j ACCEPT
iptables -t mangle -A PREROUTING -p tcp --dport 80 -j TPROXY  --tproxy-mark 0x1/0x1 --on-port 3129
iptables -t nat -A POSTROUTING -o eth1 -j MASQUERADE
iptables -A FORWARD -o eth0 -m state --state NEW,RELATED,ESTABLISHED -j ACCEPT
iptables -A FORWARD -i eth0 -m state --state RELATED,ESTABLISHED -j ACCEPT
iptables -A INPUT -i lo -j ACCEPT
iptables -A INPUT -p icmp -m icmp --icmp-type 0 -j ACCEPT
iptables -A INPUT -i eth0 -p tcp -m tcp --tcp-flags FIN,SYN,RST,ACK SYN -m limit --limit 5/sec -j ACCEPT
iptables -A OUTPUT -o lo -j ACCEPT
iptables -A OUTPUT -p icmp -m icmp --icmp-type 8 -j ACCEPT


================================
#squid3 config
acl manager proto cache_object
acl localhost src 127.0.0.1/32
acl to_localhost dst 127.0.0.0/8
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 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 allow manager localhost
http_access allow manager
http_access allow !Safe_ports
http_access allow CONNECT !SSL_ports
http_access allow localnet
http_access allow localhost
http_access deny all
http_reply_access allow all

http_port 3129 tproxy
tcp_outgoing_address 0.0.0.0
udp_incoming_address 0.0.0.0
udp_outgoing_address 0.0.0.0
icp_port 0

via off
forwarded_for off
log_mime_hdrs off
httpd_suppress_version_string on

ie_refresh on
cache_mem 256 MB
maximum_object_size_in_memory 16 KB
cache_dir ufs /var/spool/squid3/cache1 1000 16 256
cache_dir ufs /var/spool/squid3/cache2 1000 16 256
cache_replacement_policy heap LFUDA
memory_replacement_policy heap GDSF
minimum_object_size 0 KB
maximum_object_size 40960 KB
mime_table /usr/share/squid3/mime.conf
logformat common %{%Y-%m-%d %H:%M:%S}tl %6tr %>a %Ss/%03>Hs %access_log /var/log/squid3/access.log common
cache_log /var/log/squid3/cache.log
cache_store_log none
logfile_rotate 5
log_mime_hdrs off
shutdown_lifetime 5 seconds
log_icp_queries off

refresh_pattern ^ftp: 1440 20% 10080
refresh_pattern ^gopher: 1440 0% 1440
refresh_pattern . 1440 20% 14400
cache_mgr webmaster
cache_effective_user proxy
cache_effective_group proxy
pid_filename /var/run/squid3.pid
coredump_dir /var/cache/squid3


==========
url http://wiki.squid-cache.org/Features/Tproxy4

check squid support
squid 3.1 = squid3 -v | grep "enable-linux-netfilter"
kernel 2.6.35 up
iptable 1.4.1

=======================
sample log and netstat


root@ThinkPad:~# tail -f /var/log/squid3/access.log
2012-02-08 17:08:18    267 192.168.2.200 TCP_MISS/200 3410 GET http://l.yimg.com/cv/ae/us/yahoo/111031/120x45liw942fx1.jpg - DIRECT/216.115.100.102 image/jpeg
2012-02-08 17:08:18    347 192.168.2.200 TCP_MISS/200 1539 GET http://l1.yimg.com/a/i/ww/met/pa_icons_18/twitter_new_20101222.gif - DIRECT/216.115.100.102 image/gif
2012-02-08 17:08:18     24 192.168.2.200 TCP_HIT/200 3070 GET http://l.yimg.com/a/i/mntl/aut/09q4/def_aa9d6007.jpg - NONE/- image/jpeg
2012-02-08 17:08:19    562 192.168.2.200 TCP_MISS/200 3440 GET http://l.yimg.com/cv/ip/ap/default/120207/bikeman_sec.jpg - DIRECT/216.115.100.102 image/jpeg
2012-02-08 17:08:19      1 192.168.2.200 TCP_HIT/200 2577 GET http://l.yimg.com/a/i/ww/met/sprite_videoicon_20100201_ltr.png - NONE/- image/png
2012-02-08 17:08:19    861 192.168.2.200 TCP_MISS/200 5836 GET http://l1.yimg.com/cv/ip/ap/default/120207/moreno2_sm.jpg - DIRECT/216.115.100.102 image/jpeg
2012-02-08 17:08:19    886 192.168.2.200 TCP_MISS/200 6500 GET http://l1.yimg.com/cv/ip/ap/default/120207/maria_sm.jpg - DIRECT/216.115.100.102 image/jpeg
2012-02-08 17:08:19    913 192.168.2.200 TCP_MISS/200 3467 GET http://l.yimg.com/cv/ip/ap/default/120208/syria_sc.jpg - DIRECT/216.115.100.102 image/jpeg

root@ThinkPad:~# netstat -tuanp | grep squid
tcp        0      0 0.0.0.0:3129            0.0.0.0:*               LISTEN      1805/(squid)   
tcp        0      0 110.164.205.140:80      192.168.2.200:51088     ESTABLISHED 1805/(squid)   
tcp        0      0 192.168.2.200:47416     216.115.100.102:80      ESTABLISHED 1805/(squid)   
tcp        0      0 192.168.2.200:38141     216.115.100.102:80      ESTABLISHED 1805/(squid)   
tcp        0      0 192.168.2.200:50905     216.115.100.102:80      ESTABLISHED 1805/(squid)   
tcp        0      0 110.164.205.143:80      192.168.2.200:51120     ESTABLISHED 1805/(squid)   
tcp        0      0 216.115.100.103:80      192.168.2.200:51133     ESTABLISHED 1805/(squid)   
tcp        0      0 192.168.2.200:43751     216.115.100.102:80      ESTABLISHED 1805/(squid)