* Isolate your DHCP server by using a static IP address on one of the clients.
* If you suspect a client is not accessing the network:
1.) Check its IP configuration [winipcfg (95) or ipconfig (NT)]
2.) Ping your Linux gateway
3.) Check your Linux gateway's routing table (netstat -nr)
4.) Then ping the Internet from the gateway (Logically pinging the client(s) from
the gateway should not bring the former back to life).
* Another thing to consider is the PPP connection itself which might be timing out.
However, it doesn't seem to be the case with yours because you are pinging right away
at the Linux box ( I assume). I also assume that you are not using DIALD.
* Are you running any dynamic routing daemon on the gateway (gated or routed)?
I am not so sure where the problem is coming from but you could easily figure it out
by eliminating some of the possibilities.
Keep me informed on your progress.
[EMAIL PROTECTED] wrote:
> Hello,
>
> I'm running RedHat 5.2 with IP masquerading in attempt to provide
> internet access to other computers in our office. As of now we do not
> have our dedicated data line yet so the linux box is using a modem to
> establish a ppp connection. It also has a NIC connecting it to the rest
> of our internal network.
>
> The firewalling & masquerading rules have all been working for me but
> then all of the sudden for no real reason nothing works anymore more.
>
> We are using internal ips of 10.x.x.x
> Also on our network are Novell fileservers and an NT server which acts
> normally as a DHCP server.
>
> The computer I am testing the linux gateway with is set with a static ip.
>
> The client computer seems to work fine with internet access for a while,
> but then, perhaps after a few momements of inactivity, i'll try to do
> something again and nothting will happen. So i attempt to ping an
> externeal ip... that returns "network unreachable" or some other similar
> message. I then check to make sure I can ping the gateway, that works
> fine, I check to see if the gateway can ping the client, that works fine,
> I ping a couple other things with the gateway to test connectivity and
> all is well. Then I try pinging from the client again and things work
> again? It seems that by pining the client from the gateway some
> connection is re-established or something. I'm not quite sure what is
> going on. If anyone has any insight on this I'd greatly appreciate it,
> or if there is any more detailed information I can provide let me konw.
> Thanks.
>
> Sincerely,
> Josh Estelle
>
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