Re: How to configure dynamic DNS client?

["Mark Champion" <mchampion bigfoot com>]

It's true that my entire network is available to the internet.  However, I
have disabled the world in /etc/hosts.deny and only allow my specific hosts
in /etc/hosts.allow and sendmail.  Similarly, I set up Samba to be very
particular as well.  I've checked this out and I think it's all doing what I
want.  On my PCs, I have file sharing completely turned off.  Also, I
install all of the RH7.2 using up2date.  I also check my security with the
tools at www.dslreports.com.

I know this isn't the most secure environment, but anyone who hacks their
way in will be very disappointed with the contents of my computer.  Nothing
of interest to anyone.

As I stated in the beginning, I'm really operating at the periphery of my
knowledge here.  I'd love to set things up as you suggest, but I'm not smart
enough to configure it let along administrate it.  With my current
configuration, the Linux computer can go down without taking the other PCs
with it.  With the more secure arrangement, all PCs would be disconnected if
my Linux computer goes down.

Am I being foolish here?

mchampion bigfoot com


----- Original Message -----
From: "Michael Austin" <maustin firstdbasource com>
To: <redhat-install-list redhat com>
Sent: Saturday, March 30, 2002 12:33 PM
Subject: Re: How to configure dynamic DNS client?


> The way you describe it, your entire network is available to internet
> including any file sharing you are doing. Is this a business and is this
> what you want?  I really don't think so.
>
> You should consider reconfiguring your entire network .. something like
> this:
>
> ====<DSL>===[DSL MODEM]---->[RH eth0]
>                             [RH eth1]--->[10/100 switch]
>                                          /     |    \
>                                         /      |     \
>                                      [PC1]   [PC2]  [PC3]
> Obviously Verizon allows you to pull more than one IP address but
> because of the frequent disconnects you will always have problems.
>
>
>
> Mark Champion wrote:
> >
> > A complete description...
> >
> > I have four PCs in my network.  Three are Win98 and one is RH7.2 Linux.
I
> > have DSL from Verizon.  My DSL modem connects to a 10/100Mb switch which
> > feeds each of the four PCs.  There are no configuration options for the
> > switch.  There is no router involved.  Each PC gets a unique IP address
via
> > DHCP.
> >
> > Each PC has a name and an entry at www.dyndns.org.  On my Linux system,
I've
> > tried to configure everything (sendmail, Samba, etc.) by name rather
than IP
> > address.  I use short names rather than the completely qualified domain
name
> > (i.e. "mypc" rather than "mypc.homeip.net").  In addition, I have an
entry
> > for each PC in my /etc/hosts table with both the short name and the
fully
> > qualified name.  I'm not sure all this is necessary, but everything
works as
> > long as my IP addresses don't change.
> >
> > One kind person sent me an rpm version of ddclient.  I have installed it
and
> > tried to configure it.  Now, ddclient can determine the IP address
> > correctly, but it doesn't update my entry at www.dyndns.org.  It also
> > doesn't update the entry in the /etc/hosts table.  I think I must not
have
> > it configured correctly.
> >
> > Thanks for any suggestions!
> >
> > mchampion bigfoot com
> >
> > ----- Original Message -----
> > From: "Michael Austin" <maustin firstdbasource com>
> > To: <redhat-install-list redhat com>
> > Sent: Saturday, March 30, 2002 10:47 AM
> > Subject: Re: How to configure dynamic DNS client?
> >
> > > First, give us a complete description of your connection, and PC's in
> > > your network etc...  You may have some things set up incorrectly.
> > > (modems, routers, hubs, NIC cards, connection software etc...)
> >
> > _______________________________________________
> > Redhat-install-list mailing list
> > Redhat-install-list redhat com
> > https://listman.redhat.com/mailman/listinfo/redhat-install-list
>
> --
> Regards,
>
> Michael Austin            Registered Linux User #261163
> First DBA Source, Inc.    http://www.firstdbasource.com
> Sr. Consultant
>
>
>
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