[tproxy] Deployment TPROXY

[V. Feitoza]

Good staff

I have the following architecture:
Arch Linux
kernel: 2.6.30
iptables: 1.4.6
ebtables: 2.0.9
squid: 3.1.0.14


Network:
eth1: 0.0.0.0
eth2: 0.0.0.0
br0: 172.16.2.3/12
route: 172.16.0.1


Firewall rules:
cd /proc/sys/net/bridge/
for i in *
do
echo 0 > $i
done
unset i

iptables -t mangle -N 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 -m socket -j DIVERT
iptables -t mangle -A PREROUTING -p tcp --dport 80 -j TPROXY
--tproxy-mark 0x1/0x1 --on-port 3129

ebtables -t broute -A BROUTING -i eth1 -p ipv4 --ip-proto tcp
--ip-dport 80 -j redirect --redirect-target DROP
ebtables -t broute -A BROUTING -i eth2 -p ipv4 --ip-proto tcp
--ip-dport 80 -j redirect --redirect-target DROP

ip rule add fwmark 1 lookup 100
ip route add local 0.0.0.0/0 dev lo table 100


Sysctl:
net.ipv4.conf.default.rp_filter=0
net.ipv4.conf.default.forwarding=1
net.ipv4.conf.all.forwarding=1
net.ipv4.ip_nonlocal_bind=1
net.ipv4.ip_forward=1

Squid.conf
acl all src all
acl manager proto cache_object

acl localhost src 127.0.0.1/32
acl to_localhost dst 127.0.0.0/8 0.0.0.0/32

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 deny manager
http_access deny !Safe_ports
http_access deny CONNECT !SSL_ports
http_access allow localnet
http_access deny all
icp_access allow localnet
icp_access deny all

http_port 3128
http_port 3129 tproxy

hierarchy_stoplist cgi-bin ?
access_log /var/log/squid/access.log squid
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
#acl shoutcast rep_header X-HTTP09-First-Line ^ICY.[0-9]
#upgrade_http0.9 deny shoutcast
#acl apache rep_header Server ^Apache
#broken_vary_encoding allow apache

cache_mgr mail at mai.com
visible_hostname agros.mail.com
cache_effective_user proxy
cache_effective_group proxy

maximum_object_size 10 MB
cache_dir aufs /var/cache/squid/cache 80000 16 256
coredump_dir /var/cache/squid/cache/
cache_store_log /var/log/squid/store.log
cache_log /var/log/squid/cache.log
access_log /var/log/squid/access.log squid

pid_filename /var/run/squid.pid

tcp_outgoing_address 172.16.2.3

debug_options ALL,1 89,6





Now comes the problem:
Sometimes browsing but slowly and in most cases customers do not open anything.

Thanks
Victor Feitoza.