On Tue, Mar 28, 2017 at 04:46:02PM -0700, Mike McClain wrote: > Howdy, > I have a WAN/LAN challenge I'm hoping for help with. > > I'm runniing Debian 7.11 on a Pentium 3 with 250MB ram. > > mike@/deb7:~> uname -a > Linux playground 3.2.0-4-686-pae #1 SMP Debian 3.2.84-2 i686 GNU/Linux > > > The situation is this: > > phone eth0 eth1 > AT&T-------| |--------| |--------| |-------| | > AT&T modem/ Linux my Win2K > router box router box > > When eth0 is up and eth1 down, > the Linux box can access the web. > 'ping ATTrouter' works. > When eth0 is up and eth1 up, > the Linux box can not access the web. > the Win2K box can access the web. > the Linux box can not access the Win2K shares. > 'ping ATTrouter' fails. > 'ping -Ieth0 ATTrouter' works. > When eth0 is down and eth1 up, > the Linux box can access the Win2K shares. > When eth0 is down and eth1 down, > it's quiet. > > The ATT router is set to 'Pass Through' giving the Linux box the ATT > router's IP address. > The Linux box is set to use DHCP. > This might explain why I loose the LAN connection when eth0 up. > > Why can the Linux box not see the web while the Win2K box can? > > I've not found or at least recognized the problem in the HowTo's. > Pointer's or suggestions? > > Thanks, > Mike > > > # The loopback network interface > auto lo > iface lo inet loopback > > # The primary network interface > allow-hotplug eth1 > # eth0 = onboard eth port > iface eth0 inet dhcp > # eth1 = 3Com PCI 3c905C card > iface eth1 inet static > address 192.168.1.2 > netmask 255.255.255.0 > network 192.168.1.0 > broadcast 192.168.1.255 > # dns-* options are implemented by the resolvconf package, if > installed > dns-nameservers 208.67.222.222 208.67.220.220
You're going to end up discovering that this is a problem in IP assignment, routing, forwarding, or something very similar. What masquerading are you doing? What IP forwarding? What routing entries are present? -dsr-
