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  • What would be the network setup on pc3 then? Just like on pc2? pc1 will be the default gateway after it gets an IP address from pc1?
    – Windows11
    Commented Dec 10, 2017 at 13:32
  • Just regular DHCP. Commented Dec 10, 2017 at 14:09
  • Note: You might not need ICS at all if you already have another router with DHCP in front of PC1. In that case you could just use bridging on all computers. Commented Dec 11, 2017 at 0:02
  • first attempt to get an IP on pc3 after bridging the NICs on pc2 failed. I assume I might need to check firewall on pc2 and add explicit rules to allow DHCP traffic (UDP ports 67,68)?
    – Windows11
    Commented Dec 11, 2017 at 19:04
  • Shouldn't be necessary with the normal Windows firewall. (Third-party ones? Maybe.) I'd first install Wireshark and investigate. When PC3 sends the DHCP query, does PC1 see it? (Does PC2 see it on both interfaces?) Likewise with responses. Commented Dec 11, 2017 at 19:21