[ale] home networking difficulties

[Andrew Grimmke]

Very, very interesting.  For the record, I have Tiny
Personal Firewall installaed on my windows machine and
am running windows me, but the same (or a similar)
issue may apply.  I will check into it. 

On Fri, 23 August 2002, Jonathan Glass wrote:

> 
> See my comments below: Sorry if I sent this once
> already.
> 
> At 09:40 AM 8/22/2002 -0400, Geoffrey wrote:
> >You might try networking the Linux box to itself. 
> That is, set the two 
> >nics to be in the same subnet and connect them
both to
> the hub.  This way 
> >you might reduce the possible issues
substantially. 
> From that point, you 
> >could verify the cables/cards are functional.  Is
it
> possible, the win box 
> >and linux box are trying to talk different
speeds? 
> (one 10 the other 
> >100).  I'm grasping now (or gasping??).
> >
> >Further comments below.
> >
> >Andrew Grimmke wrote:
> >
> >>1.  The hardware is working, at least to some
degree.
> >>arp apprear to work fine (according to the
tcpdump and
> >>windump outputs), it's icmp that is not
working.
> >
> >I don't know that we can say this definitely just
yet.
>  I would have 
> >expected that once you shutdown the firewalls on
both
> machines that you 
> >should have been able to either telnet or ping
from
> one to the other in at 
> >least one direction.
> 
> Interesting thing happened.  A student loaded
ZoneAlarm
> on a Win2K box as 
> administrator.  He logged in as himself, and the only
> thing that would work 
> as IE.  No NT domains, no SSH, no pinging.  I
> uninstalled ZoneAlarm, and 
> still nothing would work.  I checked the zone alarm
> site, and there is an 
> issue with Win2K and zone alarm.  You have to manually
> uninstall all the 
> files (safe mode, remove them by hand) and registry
> keys, then reboot to 
> get full networking back again.  Just a thought...
> 
> 
> >>2. I have sent and recieved icmp packets from
the
> linux
> >>box in the past.  So, although I initially
thought
> that
> >>maybe linux was blocking ping responses, I am
thinking
> >>that's a long shot now.
> >
> >Agreed, since you did turn off the firewall and
make
> the same attempt.
> >
> >>3. I have had trouble with icmp on the
windows box
> >>before.  I remembered this recently.  When I
first got
> >>broadband (and was only running windows) I
tried to
> get
> >>a friend to ping me with no luck.  I can ping
myself
> >>(192.168.1.2) internally, however.
> >
> >But pinging yourself more then likely goes the
local
> loop (127.0.0.1) so 
> >it never touches the nic, wire, or that subnet.
> >
> >>4. The Windows firewall is off.  Although it
is still
> >>installed, I have removed it from the startup
routine.
> >
> >I guess you could uninstall it to insure they're
not
> trying to 'protect 
> >you from yourself' which seems to be a common
thread
> through windows software.
> >
> >>I am starting to think this is a Windows
problem. 
> Like
> >>some kind of "stealth mode" where
it ignores icmp
> >>packets.  I could find nothing about this on
the net,
> >>unfortunately.  And of course this is just a
> hypothesis.
> >
> >See note above. :)
> >
> >
> >
> >--
> >Until later: Geoffrey          
esoteric at 3times25.net
> >
> >I didn't have to buy my radio from a specific
company
> to listen
> >to FM, why doesn't that apply to the Internet
> (anymore...)?
> >
> >
> >---
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Andrew Grimmke
Marietta, Georgia

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