I have a Transparent Proxy setup currently working and not seeing any problems while browsing. I am trying to setup squid to show client's IP instead of proxy server's IP. How do I go from this setup to implementing tproxy? Any pointers will be highly appreciated. CentOS release 5.3 (Final) iptables v1.4.3.2 Squid Cache: Version 3.0.STABLE16 Linux 2.6.29.4-tproxy2 (custom kernel for tproxy) Cisco 7206VXR WCCPv2 // start of squid.conf 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 SSL_ports port 8443 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 Safe_ports port 8443 # Plesk 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 http_access allow all http_port 3128 transparent hierarchy_stoplist cgi-bin ? hosts_file /etc/hosts 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 coredump_dir /var/spool/squid http_port 3129 logformat squid %ts.%03tu %6tr %>a %Ss/%03Hs %<st %rm %ru %un %Sh/%<A %mt #emulate_httpd_log on access_log /var/log/squid/access.log squid cache_access_log /var/log/squid/access.log cache_log /var/log/squid/cache.log cache_store_log /var/log/squid/store.log debug_options ALL,3 no_cache allow our_networks cache_dir ufs /var/spool/squid 200000 256 256 cache_effective_user squid cache_swap_high 100% cache_swap_low 80% cache_mem 2 GB maximum_object_size 8192 KB half_closed_clients on client_db off wccp2_router <router primary IP on GEthernet> wccp2_rebuild_wait on wccp2_forwarding_method 1 wccp2_return_method 1 wccp2_assignment_method 1 wccp2_service standard 0 forwarded_for on // end of squid.conf // start of /etc/rc.d/rc.local modprobe ip_gre iptunnel add wccp2 mode gre remote <router wccp id IP address> local <eth0 IP address> dev eth0 ifconfig wccp2 <eth0 IP Address> netmask 255.255.255.255 up echo 0 > /proc/sys/net/ipv4/conf/wccp2/rp_filter # these are the ONLY iptables rules on the system at the moment(to avoid issues). iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 80 -j REDIRECT --to-port 3128 iptables -t nat -A PREROUTING -i wccp2 -p tcp -j REDIRECT --to-port 3128 // end of rc.local Thanks, Alex DeAraujo
