Hi Squid community, I have an issue whereby I am just struggling to find out why it wont work. I have trawled through multiple forums, howto's, faq's etc but no matter what I do, I cannot get it to work properly. Here is what I have done so far: Router IP: 10.114.3.34 Squid IP: 10.112.4.4 WAN Subnet: 10.112.0.0 / 255.252.0.0 Squid Config: http_port 3127 intercept wccp2_router 10.114.3.34 wccp2_forwarding_method gre wccp2_return_method gre wccp2_service standard 0 Confirm I can access and use port 3127 directly without issue from any location in the WAN. Router Config: ip wccp web-cache interface G0/1 !Inside interface ip wccp web-cache redirect in Added to sysctl.conf: # Controls IP packet forwarding net.ipv4.ip_forward = 1 # Controls source route verification net.ipv4.conf.default.rp_filter = 0 net.ipv4.conf.eth0.rp_filter = 0 net.ipv4.conf.eth0.ip_filter = 0 net.ipv4.conf.gre0.rp_filter = 0 net.ipv4.conf.gre0.ip_filter = 0 Added to /etc/sysconfig/network-scripts/ifcfg-gre0 DEVICE=gre0 BOOTPROTO=static IPADDR=127.0.0.2 NETMASK=255.255.255.0 ONBOOT=YES IPV6INIT=NO Linux Configuration: modprobe ip_gre ifup gre0 iptables -t nat -F iptables -t nat -A PREROUTING -i gre0 -p tcp -m tcp --dport 80 -j DNAT --to-destination 10.112.4.4:3127 If, I then do a tcpdump -i gre0 I can see packets flowing through this interface with destination port 80. Unfortunately it seems as if they are somehow not being natted to the squid server. I've tried different varying methods of doing this, but none of them seem to work. Does anyone have any ideas? Regards, Jordan.
