I am trying to get TProxy setup and running on a Linux based squid box.
I have compiled a custom kernel with the following options (2.6.28.7)
NETFILTER_TPROXY=y
NETFILTER_XT_MATCH_SOCKET=y
NETFILTER_XT_TARGET_TPROXY=y
I have also installed the latest iptables
root@cache-01:/var/log/squid3# iptables -V
iptables v1.4.3-rc1
And compiled squid 3.1.0.6
Squid Cache: Version 3.1.0.6
configure options: '--prefix=/usr' '--includedir=/include' '--mandir=/share/man'
'--infodir=/share/info' '--sysconfdir=/etc' '--localstatedir=/var'
'--libexecdir=/lib/squid3' '--disable-maintainer-mode' '--disable-dependency-tracking'
'--srcdir=.' '--datadir=/usr/share/squid3' '--sysconfdir=/etc/squid3'
'--mandir=/usr/share/man' '--with-cppunit-basedir=/usr' '--enable-inline'
'--enable-async-io=32' '--enable-storeio=ufs,aufs,diskd' '--enable-removal-policies=lru,heap'
'--enable-delay-pools' '--enable-cache-digests' '--enable-underscores'
'--enable-icap-client' '--enable-follow-x-forwarded-for' '--with-filedescriptors=65536'
'--with-default-user=proxy' '--enable-linux-netfilter' --with-squid=/tmp/squid-3.1.0.6
--enable-ltdl-convenience
My NAT Rules are as follows
echo 1 > /proc/sys/net/ipv4/ip_forward
/sbin/iptables -t mangle -N DIVERT
/sbin/iptables -t mangle -A DIVERT -j MARK --set-mark 1
/sbin/iptables -t mangle -A DIVERT -j ACCEPT
/sbin/iptables -t mangle -A PREROUTING -p tcp -m socket -j DIVERT
/sbin/iptables -t mangle -A PREROUTING -p tcp --dport 80 -j TPROXY
--tproxy-mark 0x1/0x1 --on-port 3129
My Squid config shows
http_port 3128
http_port 3129 tproxy
If I run a dmesg I see it loads the tproxy support
[ 15.339298] ip_tables: (C) 2000-2006 Netfilter Core Team
[ 15.458549] NF_TPROXY: Transparent proxy support initialized, version
4.1.0
[ 15.458552] NF_TPROXY: Copyright (c) 2006-2007 BalaBit IT Ltd.
[ 15.510067] nf_conntrack version 0.5.0 (16384 buckets, 65536 max)
A tcpdump shows http traffic hitting the box but nobody it able to surf.
Any ideas what could be wrong??
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RipNET Ltd. System/Network Administrator
Tel.: 613-342-3946 x294
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