transparent proxy with TS2.3.1-unstable

[魏晋 <we...@gmail.com>]

hi
I want to set up a transparent proxy server with ts2.3.1,  but  the
following error happens:
ERROR: [bindProxyPort] Unable to set transparent socket option [92] Protocol
not available
can anybody help me? Thanks

record.conf:
CONFIG proxy.config.http.server_port_attr STRING =
CONFIG proxy.config.cluster.ethernet_interface STRING eth1

The server has two network interfaces, eth0 (LAN), eth1(INTERNET), and the
OS system is CentOS5.4. And I connected the server(eth0) and client with one
a network cable.
The following is our iptables rules:
#!/bin/sh
#
------------------------------------------------------------------------------------
# See URL:
http://www.cyberciti.biz/tips/linux-setup-transparent-proxy-squid-howto.html
# (c) 2006, nixCraft under GNU/GPL v2.0+
#
-------------------------------------------------------------------------------------
# TRAFFIC server IP
TRAFFIC_SERVER="192.168.8.131"
# Interface connected to Internet
INTERNET="eth1"
# Interface connected to LAN
LAN_IN="eth0"
# Traffic Server port
TS_PORT="8080"

# DO NOT MODIFY BELOW
# Clean old firewall
iptables -F
iptables -X
iptables -t nat -F
iptables -t nat -X
iptables -t mangle -F
iptables -t mangle -X
# Load IPTABLES modules for NAT and IP conntrack support
modprobe ip_conntrack
modprobe ip_conntrack_ftp
# For win xp ftp client
#modprobe ip_nat_ftp
echo 1 > /proc/sys/net/ipv4/ip_forward
# Setting default filter policy
iptables -P INPUT DROP
iptables -P OUTPUT ACCEPT
# Unlimited access to loop back
iptables -A INPUT -i lo -j ACCEPT
iptables -A OUTPUT -o lo -j ACCEPT
# Allow UDP, DNS and Passive FTP
iptables -A INPUT -i $INTERNET -m state --state ESTABLISHED,RELATED -j
ACCEPT
# set this system as a router for Rest of LAN
iptables --table nat --append POSTROUTING --out-interface $INTERNET -j
MASQUERADE
iptables --append FORWARD --in-interface $LAN_IN -j ACCEPT
# unlimited access to LAN
iptables -A INPUT -i $LAN_IN -j ACCEPT
iptables -A OUTPUT -o $LAN_IN -j ACCEPT
# DNAT port 80 request comming from LAN systems to ts 8080 ($TS_PORT) aka
transparent proxy
iptables -t nat -A PREROUTING -i $LAN_IN -p tcp --dport 80 -j DNAT --to
$TRAFFIC_SERVER:$TS_PORT
# if it is same system
iptables -t nat -A PREROUTING -i $INTERNET -p tcp --dport 80 -j REDIRECT
--to-port $TS_PORT
# DROP everything and Log it
iptables -A INPUT -j LOG
iptables -A INPUT -j DROP