[NTLUG:Discuss] can't ping outside

[clyde swann]

i have the same issue and i have ip_forwarding compiled on in the kernel, as 
well it is set on in /etc/sysctl.conf.  i've even tried sending the command 
echo "1" > /proc/sys/net/ipv4/ip_forward from rc.local to no avail.  as 
stated in this message other services are getting out.  if ip_forwarding was 
not set then nothing would bridge over to the outside nic.  i'm starting to 
thing a bug somewhere with all the combinations i've tried.  could there be 
an issue with route?  i'm thinking about going with iproute to see if that 
makes a difference.  i've have read of strange occurances happening with 
route.  any comments on this please?


>From: Peter Smith <peters at bakura.bitstreet.net>
>Reply-To: discuss at ntlug.org
>To: bobby at wrennest.com
>CC: "discuss at ntlug.org" <discuss at ntlug.org>
>Subject: Re: [NTLUG:Discuss] can't ping outside
>Date: Wed, 7 Jun 2000 12:56:35 -0500 (CDT)
>
>Sounds to me like you need to turn on the kernel's IP_FORWARDing features
>(they were most likely defaulted on you old box.)  You'll need to check
>the current state of forwarding by issuing this command as root:
>
>cat /proc/sys/net/ipv4/ip_forward
>
>It it returns "0" then you know that is the problem.  For any data to get
>from one NIC to the other NIC you _have_ to have ip_forward set to "1".
>So you need to issue this next command as root:
>
>echo 1 >/proc/sys/net/ipv4/ip_forward
>
>There is most likely a place in your Redhat install's config where you
>should permanently set this.  You'll probably want to look into
>"linuxconf" to access the networking menus where linuxconf's scripts will
>always set this kernel proc variable.
>
>Hope this helps,
>Peter
>
>On Wed, 7 Jun 2000 bobby at wrennest.com wrote:
>
> > I just set up a new router for my dsl line. On the old router I can ping
> > inside addresses (192.168.1.x) and the address of the nic connected to
> > the dsl. I can also ping address out in the world. Other services work
> > fine (lynx, ncftp, etc).
> >
> > On the new box configured with RH6.0 with both nic's enabled. I can do
> > all of the above except ping addresses out in the world.
> >
> > Where do I turn icmp on and off or is it something else I am missing. I
> > know I never did anything on the old box to make pings work they just
> > always have.
> >
> > Thanks to all for any help
> > Bobby
> > --
> > This tagline is identical to the one you are reading.
> >
> > _______________________________________________
> > http://ntlug.org/mailman/listinfo/discuss
> >
>
>
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