On Mon, Jul 05, 2021 at 01:53:19PM +0200, to...@tuxteam.de wrote: > Could you tell us: > > - what the netmasks are > - the output of "ip route list" (or of "route -n"), best before > you connect eth1 and after? > > Is your box perhaps requesting (and getting) an IP address via > DHCP at the moment you connect eth1?
Start by showing us the full /etc/network/interfaces file, please. There are too many unknowns at this point, starting with the OP's definition of "thin client", and also including the *actual* configuration of the two network interfaces. Are they static, or DHCP? Did the OP provide more than one "gateway" line by mistake? And so on.
