Thank you for the information supplied. I have a confession to make, eth0 & eth1 changed place when I configured eth1.
The 2 NICs (and Debian) are working correctly, now to get the proxy server to work as I want. regards, David. On Tue, 2021-07-06 at 07:18 -0400, Greg Wooledge wrote: > On Tue, Jul 06, 2021 at 02:04:09PM +0300, Andrei POPESCU wrote: > > On Ma, 06 iul 21, 07:03:38, David wrote: > > > The first question from Jeremy, the value of > > > /proc/sys/net/ipv4/ip_forward is 0, connecting to the thin client > > > via > > > putty and using nano as an editor, it tells me I can't alter this > > > value, I am logged in as root. > > > > Because it's a special file and anyway, changing the value > > wouldn't > > persist across reboots. > > Expanding on this, /proc and /sys are special pseudo-file systems > which present kernel interfaces as "files". You can read most of > them and write to some of them, but you cannot "edit" them. > > If you want to change the value of ip_forward, you need to open that > file and write the new value to it. Usually this is done with a > shell > running as root: > > echo 1 > /proc/sys/net/ipv4/ip_forward > > As Andrei mentioned, this is a temporary change, which won't persist > across reboot. To make this change "permanent", you also need to > edit > the /etc/sysctl.conf file (which is a real file). There's probably > a section that looks like this: > > # Uncomment the next line to enable packet forwarding for IPv4 > #net.ipv4.ip_forward=1 > > That's the section you're looking for. If yours doesn't have this > section, then you'll just have to add the appropriate line yourself. >