[H-GEN] big pond cable on knoppix 4

[Troy Piggins]

* Stephen Thorne <stephen.thorne at gmail.com> :
> 
> On 14/11/05, Troy Piggins <troy at piggo.com> wrote:
> > Make sure port 5050 (by default on bpalogin) is open on your
> > firewall.  Bigpond sends a "heartbeat" to that port on your machine
> > to make sure you're still there.
> >
> > I don't know your modem there, but I assume it is just a modem, not
> > a router with firewall builtin (else you'll need to open up that
> > port there and any associated port forwarding etc).
> 
> Hm. I don't immediately see a network architecture where a 'firewall'
> would come into this, as to use bpalogin, you need a real-world ip, as
> allocated by DHCP, which comes in from the cable modem.

firewall=iptables for my context.  I run a linux box and modem, extl
interface on the linux box is the one that gets the extl IP from
bigpond.  So I have to allow port 5050 incoming so the linux box
gets the heartbeat.  The linux box gets the DHCP lease, not the
modem.

> Having a machine, or a 'cable router' between the knoppix host (in my
> previous post I made comments about redhat/fedora, sorry, it was one
> of several errors) would imply that that machine has taken a DHCP
> lease, and logged into the bigpond server. Having any machine behind
> that host would require a phsically or logically seperated network,
> and the 'firewall' doing some form of NAT - meaning that the knoppix
> host would just have to get a DHCP lease from the 'firewall' and ..
> volla. No logging in required, because everything is handled by
> another machine...
> 
> But you do raise an interesting point, it's probably a good idea to
> run tcpdump in order to see the authentication traffic, if you're
> having problems.
> 
> This will show port 5050 traffic and icmp traffic.
> tcpdump -i eth0 icmp or port 5050
> 
> assuming that eth0 is the external interface, with an ip address
> assigned via the cable modem's dhcp.

-- 
Troy Piggins
Ubuntu 5.10 (Breezy Badger) : kernel 2.6.12-9-386, postfix 2.2.4,
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Compiled from src:            slrn 0.9.8.1/rt (score_color patch)