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Re: Unknown problem connecting

On Wed, Apr 05, 2000 at 07:11:16AM -0400, J. Hartzelbuck wrote:

> Using Debian, I've installed wvdial and can connect very nicely, but
> commands issued don't do anything! Ping doesn't respond, lynx doesn't
> respond. I'm new to all this, so don't know where I might be going
> wrong. Can anyone give any pointers?

(Hi, Chris.)  I think you're saying you've made a modem connection to
Internet using wvdial, but then can't get any further?

Do you have a ppp connection established?  Is there a default route?

  netstat -r
...should show 'default' and 'ppp0', if so.

Do you have ip_forwarding turned 'on'?  Try:

  cat /proc/sys/net/ipv4/ip_forward
...and you should get a result of '1'; if you don't, do:

 echo "1" > /proc/sys/net/ipv4/ip_forward
...and that'll put it there.  Do you have "policy" rules that are set
to reject packets moving in or out of your own system?  Do:

  ipchains -L

...to find out; if the 3 groups, "input", "output" and "forward" all
show a policy of "reject" (which is their default), you'll wanna change
that.  If you're running a standalone system, you probably can do
blanket 'accept' statements and not be leaving your system open to
attack from "the outside world":

 ipchains -P input ACCEPT
 ipchains -P output ACCEPT
 ipchains -P forward ACCEPT
...will do that; it's likely you'll need to do that again, next time
you reboot.

And that's about -all- I know about this. :-)  If there are finer
points to it that should be added, maybe someone else will join in here
and let us know...?


 -- Jeff --   <http://www.wellnow.com>

 "There's nothing left in the world to prove.  All that's worth doing
  is to love one another, using whatever means are available to serve."

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