cant ping from behind proxy box

[Peter Larsen]

"ping" doesn't use proxies. Again, you're blocked by the proxy server on
purpose. 

Put in another way, you have to provide a router to do that. Not a proxy
server.

On Sun, 2012-03-04 at 18:51 +0200, Zoltan Szecsei wrote: 
> On 2012/03/04 18:44, Peter Larsen wrote:
> > On Sun, 2012-03-04 at 18:28 +0200, Zoltan Szecsei wrote:
> >> Hi,
> >> Sorry - newbie to fedora, and google is driving me mad !
> >>
> >> I've just setup up a F17alpha box, and am trying to ping the internet
> >> from behind my Ubuntu proxy server, which also runs bind.
> >>
> >> I have set GATEWAY in /etc/sysconfig/network
> >> I have put nameserver 192.168.0.1 into /etc/resolv.conf
> >> I have done a export http_proxy=http://192.168.0.1:3128
> >>
> >> I have done a /etc/init.d/network restart
> >>
> >> and I still cannot ping by IP nor by dnsalias name
> > Ping what??
> anything that starts with www.
> Even if I get their IP address and ping with the IP address, it still 
> times out.
> > You won't be able to ping outside your proxy at all unless you allow
> > your hosts to bypass the proxy (which would sorta elliminate the idea of
> > the proxy in the first place).
> >
> > What IP and network did you give your fedora box? Setting up the proxy
> 192.168.0.143
> > cannot be done until you have basic networking up. In other words, based
> > on the above, your fedora box need to have an address in 192.168.0.x -
> > and it needs to then be connected to a hub/switch that allows access to
> > 192.168.0.1. Once done, you test with ping to 192.168.0.1.  There's a
> > chance you run with a "angry" firewall on 192.168.0.1 which could be
> > blocking your pings, but if you say you can ping it from other hosts,
> > that's obviously not the case.
> yes, and I put an ALLOW in the squid ACL for that IP address. Firefox 
> works from this F17a box.
> Anything from the CLI fails.
> >
> >> but this all works from other ubuntu boxes, and of course from the
> >> server machine itself.
> >> I can also ping all the PCs on my internal network.
> > That includes the proxy server? If so, everything is working according
> > to the setup.
> yes
> >
> >> Please can someone tell me my deliberate mistake in this regard.
> > Proxy servers blocks you from direct access to the outside network. It's
> > why proxy servers are mostly used - to deny direct access to the
> > workstations. That means pings too.
> correct, but I have a working ACL for this IP address.
> >
> >
> >> TIA,
> >> Zoltan
> >>


-- 
Best Regards
  Peter Larsen

Wise words of the day:
Linux: the operating system with a CLUE... Command Line User Environment.
	-- seen in a posting in comp.software.testing
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