[Mailinglist] Internet Connection Sharing

Binny V Abraham binnyva at yahoo.com
Thu Dec 28 20:34:32 IST 2006


Hi,

> > > Try "ping google.com" from windows machine.
> > Now things are really interesting - I can ping
> > google.com from the XP System - but cannot open it
> > in the browser. Any idea why this is so?
> Check if there is any proxy setting in your internet
> explorer. Disable proxy 
> (if any). Try a different browser (say, firefox or
> opera). Another reason can 
> be firewall. To rule this out, try telneting to port
> 80 of google.com from 
> windows machine.
I did all that - I tried all 3 browsers with no
results. I cannot telnet to google - or even to the ip
address of the linux system.

BUT - I could access the net from the XP system! If I
open up LimeWire(A P2P app my brother uses), it
connects to the net, can search thru files, download
files etc. from the net. My guess is that it uses a
different port. And somehow, all major ports like
80,23,etc are blocked. By the windows system or by my
system. It is not a windows firewall issue - I
disabled all of them - the results are the same.

Any ideas, anyone?

> > This is a problem - if I run this command
> > iptables --flush
> > the whole network comes to a halt. I cannot even
> ping
> > my own network card from the linux system. Before
> > posting this question on this group, I searched a
> bit
> > for how to do it and did a lot of experimenting. I
> may
> > have mess up the configurations a bit.
> 
> hmm.. that's weird.
Its weird - and interesting at the same time. 

iptables -L
-----------
Chain INPUT (policy DROP)
target     prot opt source               destination
ACCEPT     all  --  anywhere             anywhere
ACCEPT     all  --  anywhere             anywhere     
      state RELATED,ESTABLISHED
ACCEPT     all  --  anywhere             anywhere
LOG        all  --  anywhere             anywhere     
      LOG level warning
DROP       all  --  anywhere             anywhere

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination
ACCEPT     all  --  anywhere             anywhere

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination
ACCEPT     all  --  anywhere             anywhere
ACCEPT     all  --  anywhere             anywhere


Where is the log of iptables kept?

Binny V A
http://binnyva.blogspot.com/

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