Re: tlug: networking woes

[Selva Nair <selva@example.com>]

On Tue, 29 Feb 2000, John Seebach wrote:

>  Kernel IP routing table
>  Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
>  localnet        *               255.255.255.0   U     0      0        0 eth0

That should be enough for the local net to be accessible.

>  default         localhost       0.0.0.0         UG    1      0        0 lo

Here is a default route through the loopback with local host as
the gateway (see the flas UG). Normally it should be the normal
loopback route with  no gateway, and mask 255.0.0.0 that gets
automatically set up by 'ifconfig lo 127.0.0.1' . Older versions of
ifconfig required an explicit 'route add -net 127.0.0.1', though.   But
in any case, the loopback route needs no gateway, should have mask 
255.0.0.0 and is not made default.

>  
>  ----------------------------------------------------------------------------
>  ...and again, after starting my ppp daemon
>  

>  
>  Kernel IP routing table
>  Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
>  210.175.27.15   *               255.255.255.255 UH    0      0        0 ppp0
>  localnet        *               255.255.255.0   U     0      0        0 eth0
>  default         localhost       0.0.0.0         UG    1      0        0 lo

I think it is because of this default route that ppp is not setting up
the correct defualt route via ppp0.

>  
>  ----------------------------------------------------------------------------
>  
>  I suspect that what's happening here is some script somewhere (likely
>  /etc/pcmcia/network.opts) is setting my defaultroute to be localhost
>  after I insert the card. There's a variable in the script
>  
>  GATEWAY="127.0.0.1"

You dont need this. The loop back is configured by 
ifconfig lo 127.0.0.1.

>  
>  that appears to be responsible this behavior. If I comment it out, I
>  can use ppp, but I can't use my local network. But, if it's there,

Really ? 

>  when i establish a ppp connection, my isp's nameserver is not the
>  default route. Arrgh.
>  
>  Can anybody tell me what I'm doing wrong?
>  
>  john
>  

Selva

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