SLS doing NAT, DHCP works, but doesn't

Discussion in 'Mac OS X Server, Xserve, and Networking' started by corbywan, Nov 10, 2009.

  1. corbywan macrumors regular

    Joined:
    Feb 4, 2008
    Location:
    Forest Grove, OR
    #1
    I have a SLS server with a static IP, domain name, all the goodies. It is successfully hosting services from the WAN and LAN side, but the LAN side is weird. How you ask?

    From a LAN client, when I try to visit the webpage, mail, or use iChat, there is about a 5 second delay before the thing responds.

    Also, if I try to ping the WAN IP from a LAN client, it times out 100% of the time. But, I can surf and go through the thing no problem at all. It's just hitting the services from the LAN side is very, very slow.

    So, my questions are these.
    On the server - Network Preferences: what should the DNS server be set to, the server (which is running the DNS service)? The docs say it should be the ISPs DNS (or in my case I like OpenDNS).
    In the DHCP Service Settings - Subnets, what should the DNS server be set to? The docs say the ISP DNS server, but it breaks when I do that.

    I'm just really curious why I can't ping the WAN of the server from the LAN, at least not in the time that the ping timeout is set for which I believe is one second.
     
  2. belvdr macrumors 603

    Joined:
    Aug 15, 2005
    #2
    If you're hosting the DNS, you should point to your DNS servers.

    Pinging across a firewall should in theory work. I would ensure you are allowing ICMP packets to the WAN interface.
     
  3. corbywan thread starter macrumors regular

    Joined:
    Feb 4, 2008
    Location:
    Forest Grove, OR
    #3
    Indeed, I can ping stuff out on the internet no problem, but I can't ping my WAN IP from inside the LAN. Doesn't seem to break anything really but everything works. More of a curiosity now, until I find something that's broken!
     

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