[ale] home networking difficulties

[Jonathan Glass]

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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