Hi all I have here a small network with a linux box working as router and production too... I use a cable modem ISP with DHCP and have 4 IPs available. Everything on the LAN is static, no DHCP; some machines and the router itself runs virtual machines (VMware) too. Currently I use only one of the IPs, with the router box, sharing it to the LAN, but I want some machines on the LAN to have access to the ISP ips, as well as virtual machines (VMware) running on the router box. I have the same setup working fine with Windows and a linksys router somewhere else, and just for testing I did it with a Windows VM on a Windows box, so I guess there's no problem in doing the same with Linux. But, it doesn't work... with tcpdump I can see DHCP packets can't get past the gateway interface on the router box. It seems obvious it's something wrong with routing, but the setup is something so simple I really can't figure what's wrong with it. These are the routes, where eth0 goes to the LAN, eth1 to the modem and vmnet8 the virtual device used by the VM on the router box. Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface localnet * 255.255.255.0 U 0 0 0 eth0 172.16.79.0 * 255.255.255.0 U 0 0 0 vmnet8 201.37.168.0 * 255.255.248.0 U 0 0 0 eth1 loopback * 255.0.0.0 U 0 0 0 lo default c925a801.virtua 0.0.0.0 UG 0 0 0 eth1 On iptables, for testing, all policies set to accept, and the relevant parts are: iptables -A INPUT -j ACCEPT -s 192.168.1.0/24 iptables -A INPUT -j ACCEPT -i eth1 -m state --state ESTABLISHED,RELATED iptables -t nat -A POSTROUTING -s 192.168.1.0/24 -j MASQUERADE iptables -A FORWARD -j ACCEPT -i eth1 iptables -A FORWARD -j ACCEPT -s 192.168.1.0/24 Any ideas on what is wrong, missing or what can I do to help find the problem ? Thanks for your time... -- Pedro Werneck
