On 6/15/25 1:42 AM, Patrick Dupre via users wrote:
PC A is connected to internet and it is fine. device enp0s20f0u11 It is in automatic setting. This PC has 2 ethernet cards By default enp1s0 (connected to PC B) and enp2s0 (connected to PC C) If I understand PC A run as a router. By default (shared to other computer) if I start PC B first (after PC A and before PC C) enp1s0 takes 10.42.0.1 and enp2s0 takes 10.42.1.1 PC A in DHCP (automatic) assigns an IP 10.42.0.82 while PC B get 10.42.1.204. If I reverse the starting order enp1s0 and enp2s0 addresses are switched. It is fine except that PC B and PC C do not communicate together. If I understand I need to configure every thing manually to have a single network for example enp1s0 would have 10.42.0.1 PC B could have 10.42.0.82 enp2s0 would have 10.42.0.2, PC C could have 10.42.0.204 Then, what would be the Gateways ? 10.42.0.x (x=1 and x=2 ?)
Now you're getting more complicated. For that you need to create a bridge over both ethernet interfaces, then set the bridge to shared. Set the IP address and subnet. Then set B and C to have a static address in that subnet. The gateway and DNS will be the address of A that you set in the shared interface.
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