openSUSE routing
by linux_m from LinuxQuestions.org on (#5KKDJ)
Hi, I have a question regarding routing in openSUSE linux. I think that something is misunderstood for me.
I have a network like this:
Internet - NAT(dhcp client) - router(mikrotik) - DHCP_server - WAN router(openSUSE) - DHCP_server - LAN linux openSUSE as a client (internet)
After configuring like this schema and setting firewall as WAN(external zone) with marked option ipv4 translation addresses and LAN(internal zone) I have internet on openSUSE client, so its ok.
As a part of a test I configure a new network without dhcp_serwer for openSUSE_client and without firewall in openSUSE_router, so I set checkbox in enable IPv4 forwarding (in Routing tab) of openSUSE_router. WHY in this case I have to add return route on router(mikrotik) with route to openSUSE_client(LAN network) to get internet on client? I checked ip table in mikrotik and it looks the same on these two cases.
I have a network like this:
Internet - NAT(dhcp client) - router(mikrotik) - DHCP_server - WAN router(openSUSE) - DHCP_server - LAN linux openSUSE as a client (internet)
After configuring like this schema and setting firewall as WAN(external zone) with marked option ipv4 translation addresses and LAN(internal zone) I have internet on openSUSE client, so its ok.
As a part of a test I configure a new network without dhcp_serwer for openSUSE_client and without firewall in openSUSE_router, so I set checkbox in enable IPv4 forwarding (in Routing tab) of openSUSE_router. WHY in this case I have to add return route on router(mikrotik) with route to openSUSE_client(LAN network) to get internet on client? I checked ip table in mikrotik and it looks the same on these two cases.