Why cannot ping 192.168.2.1

Discussion in 'Mac OS X Server, Xserve, and Networking' started by rockinmyshoe, Oct 18, 2012.

  1. macrumors newbie

    Joined:
    Oct 18, 2012
    #1
    I set up a G4 Mac 10.5.8 with two ethernet connections. Both with Static addressing. I have internet sharing turned on, with en0 being shared with en1

    en0 is 172.20.0.75, 255.255.255.0, Router 172.20.0.1
    en1 is 192.168.2.1, 255.255.255.0, Router 172.20.0.75

    a laptop using 172.20.0.1 255.255.255.0 is tied to port en0
    a mini using 192.168.2.75 255.255.255.0 is tied to port en1

    so the schematic looks like;

    (laptop 172.20.0.1) <--> (172.20.0.75 en0 - G4 - en1 192.168.2.1) <--> (192.168.2.75 mini)

    from the laptop I can ping 172.20.0.1, 172.20.0.75
    from the G4 I can ping 172.20.0.1, 172.20.0.75, 192.168.2.1, 192.168.2.75
    from the mini I can ping 192.168.2.75, 192.168.2.1, 172.20.0.75, 172.20.0.1

    but from the laptop I cannot ping 192.168.2.1 or 192.168.2.75

    Any suggestions as to why?
     
  2. macrumors member

    Joined:
    Dec 4, 2003
    Location:
    LONDON UK
    #2
    Sounds like routing or firewall

    What is the default gateway of the laptop?

    It should be 172.20.0.75 or you need a static route to 192.168.2.0 255.255.255.0 via 172.20.0.75

    If one of these is true then try disabling any firewall
     
  3. thread starter macrumors newbie

    Joined:
    Oct 18, 2012
    #3
    I had in the laptop 172.20.0.1 as the gateway. I set it to 172.20.0.75 and now i can ping 192.168.2.1 and 192.168.2.75.

    Thank you, that tests out the link as being good end to end.

    the next thing is to replace the laptop with LAN port on a router. :)
     
  4. macrumors member

    Joined:
    Dec 4, 2003
    Location:
    LONDON UK
  5. thread starter macrumors newbie

    Joined:
    Oct 18, 2012
    #5
    First time on this forum. Do I award points or is just a atta-boy
     
  6. macrumors member

    Joined:
    Dec 4, 2003
    Location:
    LONDON UK
    #6
    That was all the feedback required :)
     

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