[svlug] Linux boycott?!?

kevin@ank.com kevin at ank.com
Mon Mar 5 20:13:01 PST 2001


I often see this kind of problem when I forget to turn on IPV4 routing
at the bastion server.  Linux tends to route ICMP messages even when 
routing is turned off or when firewall rules prohibit connections, but 
TCP traffic is correctly terminated at the bastion.

Cheers,
-kls

On Sun, Mar 04, 2001 at 04:12:15PM -0800, Felipe Leme wrote:
> 
> I was trying to access some e-business sites (paypal and turbotax), but
> I simply can't connect to them from my linux box, even though I can
> access normally from work (using a winblows 2000 machine). I thought it
> could be an ISP problem, but then I reboot my machine to winblows 98
> (which is useful in these kind of emergencies :), and it worked fine,
> even using netscape 4.7 (so it's not a IE 5 discrimination problem).
> 
> Here is what I get in my Mandrake 7.2/kernel 2.4.0-test9 box:
> 
> www.paypal.com
> 
> netscape -> immediately after typing the address, a windows pops up:
> "Netscape's network connection was refused by the server www.paypal.com.
> The server may not be accepting connections or may be busy. Try
> connecting again later"
> 
> lynx -> time lynx www.paypal.com
> 
> Looking up www.paypal.com first
> Looking up www.paypal.com
> Making HTTP connection to www.paypal.com
> Alert!: Unable to connect to remote host.
> 
> lynx: Can't access startfile http://www.paypal.com/
> Command exited with non-zero status 255
> 0.01user 0.05system 0:03.18elapsed 1%CPU (0avgtext+0avgdata
> 0maxresident)k
> 0inputs+0outputs (779major+325minor)pagefaults 0swaps
> 
> 
> ping -> ping www.paypal.com
> PING www.paypal.com (216.136.154.74): 56 octets data
> 64 octets from 216.136.154.74: icmp_seq=0 ttl=246 time=13.3 ms
> 64 octets from 216.136.154.74: icmp_seq=1 ttl=246 time=16.5 ms
> 64 octets from 216.136.154.74: icmp_seq=2 ttl=246 time=10.7 ms
> 
> www.turbotax.com
> 
> netscape -> after a few minutes, I get a connection timeout message.
> It's the same with ping and lynx, so it behaves as if the site is down
> 
> 
> 
> Does anyone has any clue of what's going on? Are these sites normally
> available to you?
> 
> It could be a routing problem in my computer, as I use DHCP at windows
> and 'manual' configuration at linux, but the parameters are the same as
> what I got with DHCP (ip, gateway, netmask, etc...), so I don't think
> that's the problem (and every other site works fine).
> 
> 
> Felipe
> 
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> svlug at lists.svlug.org
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-- 
          //                               .--=,
 .....::://::::::::::::::::::::::::::::.. (o O &           kevin at ank.com
:::::::://:::://://://:/:://::||_//       / V  K   
 :::::://:::://:/:|//'/' // _,|'         r ,  'qk   
  :'''/____ // /  //  |_// // ||        .'~.  .~`, 
                                   kls   \_/-=\_/




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