[H-GEN] optus cable modem

[Stephen Thorne]

On Sat, Sep 23, 2000 at 04:06:26PM -0700, Sarah Hollings wrote:
> I know there has been some discussion of this topic on the lists, but
> damned if I can find it.
> 
> I have Linux talking to optus just fine over the network, by using the
> line
> dhcpcd -h <optus-computer-name> eth1 [1]
> 
> ...mostly.  If I have previously run my dual-boot system in windoze,
> without powering off for too long.  Also, the dhcp client has a way of
> clobbering my hosts file, and my resolv.conf which messes up my
> peer-peer network.
> 
> The set up I have btw is this:
> ******************************
> Pentium 667       <--5 port hub-->         Pentium P133
> dual-boot Debian/Win98                     dual-boot Debian/Win98
> 2 x NIC's                                  1 x NIC
> ipmasq 
> 
> ( files resolv.conf and hosts are attached, these are the versions I get
> after dhcpc has had a go at them.  The *.clobbered versions are the ones
> I had, while I was trying to get my network going )
> 
> Can anyone help me with the following issues, please???
> 
> 1)  How do I address the clobbering of my network setup when dhcp
> successfully runs?  
> 
> Get rid of dhcp?  I don't want to go and put in the ip addresses and
> everything in by hand.  I know Optus seem to "never" change them
> (effectively giving me a static ip) but they reserve the right to change
> them, and probably would for network outages.  I want a transparent and
> reliable solution.  
> 
> I am also trying to set up a testbed for a php/mysql/http(apache)
> solution for dynamic pages on my website.  If any Optus techs are
> listening, this is **NOT** going to run on my machine (apart from
> testing and debugging) as I have space kindly made available to me on
> diadora.client.uq.net.au.  However, if I want to leave my machine on,
> and go to another site to try debugging the above testbed, I am going to
> be buggered if Optus choose that moment to change their ip addressing
> around.
> 
> Use the -R option: dhcpcd -h <optus-computer-name> -R eth1  ...?
> Yes, but this simply causes dhcpcd to put a symlink from
> /etc/resolv.conf --> /etc/dhcpc/resolv.conf still leaving me with a
> bunch of name problems.
> 
> It also clobbers my hosts file.

Theres a cute little filesystem tag called "append only"

chattr +a hosts

or if you want, you can make it immutable

chattr +i hosts

to quote from man chattr

       A file with the  `i'  attribute  cannot  be  modified:  it
       cannot  be  deleted  or renamed, no link can be created to
       this file and no data can be written to the file. Only the
       superuser can set or clear this attribute.

and 

       A file with the `a' attribute set  can  only  be  open  in
       append  mode  for  writing.  Only the superuser can set or
       clear this attribute.


End the clobbering :)

Steve
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