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Routing between two networks: Is a static IP invisible for the other network?

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  • Routing between two networks: Is a static IP invisible for the other network?

    HI! I'm new in this forum, but i'm very full of question... but the first one, most important of all is:

    I've configured a net with a 2003 server with DHCP, DNS and ROUTING on it, with 2 network cards.
    Everything was very good... i can ping everything thanks to the routing, and i have every PC (both on the two lans) with his own IP address well given by DHCP.

    The only problem is that my ADSL MODEM need a static IP, and everyone on his subnet (192.168.0.1) can ping him (it is 192.168.0.1 mask 255.255.255.0) BUT
    no one of the PC on the OTHER subnet (192.168.1.0 mask 255.255.255.0) can.. strange is that pc on 192.168.1.0 can ping every PC that has taken his configuration by DHCP server (the "other" subnet is 192.168.1.0 mask 255.255.255.0 and every pc on that subnet ping every pc on the 192.168.0.0)

    I also try that putting one new pc on the 192.168.0.0, via dhcp... every pc on 192.168.1.0 ping it, giving a static ip it became invisible for the 192.168.1.0 subnet, but still online for his own subnet (192.168.0.0).

    So the modem, wich do not have a name configurable, and do not have a "client DHCP" to help me solve this problem.

    How can i solve this??
    Maybe a static route on the DHCP server?
    maybe a config file for static addresses (dhcp reservation doesn't work, because they need a client asking for them!!!!)?
    maybe it's time to sell modem, buying some other WITH client DHCP?

    Thank you, sorry for my horrible english, i hope have been clear
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