alf Of Tim
Sent: Sunday, June 19, 2011 12:03 AM
To: Community support for Fedora users
Subject: Re: Two elementary questions on LANs
On Sun, 2011-06-19 at 09:59 +0800, Ed Greshko wrote:
> Since the MAC address is in the hardware I would venture to say that
> the IP address being assigned to an
On Sun, 2011-06-19 at 09:59 +0800, Ed Greshko wrote:
> Since the MAC address is in the hardware I would venture to say that
> the IP address being assigned to an interface is the same no matter if
> you boot to Linux or Windows.
Depending on the DHCP server, it may use the MAC plus some other (UID
On 06/19/2011 02:44 AM, J. Alex Aycinena wrote:
>
> I have desktops and laptops on my local LAN that each dual-boot with
> F15 and Windows and each have a wired and wireless LAN connection. My
> router acts as the DHCP Server but doesn't have the capability to
> assign a pre-defined IP address to e
On 06/19/2011 01:56 AM, Timothy Murphy wrote:
> It certainly wasn't written there,
> as I would have been even more certain to follow that advice.
> (I could conceivably have overlooked it in ifcfg-wlan0.)
>
OK, you've managed to confuse me again.
I'm pretty sure I read you first say it was c
t; Date: Fri, 17 Jun 2011 06:48:02 +0800
> Subject: Re: Two elementary questions on LANs
> Some additional information regarding DHCP.
>
> As I mentioned, the lease information is retained by both the client and
> the server.
>
> Let's assume that this is not the
Ed Greshko wrote:
>>> When you bring it downNM will rewrite it to read
>>>
>>> # No nameservers found; try putting DNS servers into your
>>> # ifcfg files in /etc/sysconfig/network-scripts like so:
>>> #
>>> # DNS1=xxx.xxx.xxx.xxx
>>> # DNS2=xxx.xxx.xxx.xxx
>>> # DOMAIN=lab.foo.com bar.foo
On 06/18/2011 03:33 AM, Timothy Murphy wrote:
> So it seems to me reasonable to say that NM_was_ editing a config file
> without my knowledge.
I'm not at all surprised. When I upgraded to F14 from 13, I found that
NM would reset my DNS numbers to 0.0.0.0 at every boot, even though I'd
told it
On 06/18/2011 09:00 PM, Timothy Murphy wrote:
> Ed Greshko wrote:
>
>>> Just to be clear: dhcp wasn't running at the point I am talking about.
>>> NM did delete the nameserver information in /etc/resolv.conf .
>> What precisely do you mean when you say "dhcp wasn't running at the
>> point I am talk
Ed Greshko wrote:
>> Just to be clear: dhcp wasn't running at the point I am talking about.
>> NM did delete the nameserver information in /etc/resolv.conf .
>
> What precisely do you mean when you say "dhcp wasn't running at the
> point I am talking about"?
>
> Do you mean your DHCP server was
On 06/18/2011 06:33 PM, Timothy Murphy wrote:
> Just to be clear: dhcp wasn't running at the point I am talking about.
> NM did delete the nameserver information in /etc/resolv.conf .
> I saw then that one can go to NM's Manage Connections
> and specify the nameservers one wants to use.
> When I di
Ed Greshko wrote:
>> I'm probably in a minority of 1, but I don't think applications
>> should edit config files without telling you.
>
> Ahh The application, NM, isn't editing a config file without your
> knowledge. First, the DNS servers are one setting that is supplied in a
> DHCP reques
On 06/18/2011 05:12 AM, Timothy Murphy wrote:
> Tim wrote:
>
>> On Thu, 2011-06-16 at 22:19 +0200, Timothy Murphy sent:
>>> I think I got this wrong too.
>>> I am running shorewall on my server,
>>> and I forgot to turn iptables off.
>> Whenever I see mentions of "turning firewall off," that's a re
Tim wrote:
> On Thu, 2011-06-16 at 22:19 +0200, Timothy Murphy sent:
>> I think I got this wrong too.
>> I am running shorewall on my server,
>> and I forgot to turn iptables off.
>
> Whenever I see mentions of "turning firewall off," that's a red flag, to
> me. Is shorewall an independent thing
On 17/06/11 15:59, RAMAKISHOREBABU KOPPULA wrote:
> I have downloaded 64-bit DVD version of Fedora 15 and when was
> installing HP Proliant DL580 G7 Server it is showing as Fedora 15 - Beta
> and it not loading correct display driver for GNOME. Could somebody help
> me in identifying suitable versi
I have downloaded 64-bit DVD version of Fedora 15 and when was installing HP
Proliant DL580 G7 Server it is showing as Fedora 15 - Beta and it not
loading correct display driver for GNOME. Could somebody help me in
identifying suitable version of Fedora for HP Proliant DL580 G7 Server?
Thank you.
On 06/17/2011 08:16 PM, Tim wrote:
> Is shorewall an independent thing, or is it a configurator for
> iptables?
Shorewall is a configurator for iptables.
Quite a good onebut a configurator non the less.
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On Thu, 2011-06-16 at 22:19 +0200, Timothy Murphy sent:
> I think I got this wrong too.
> I am running shorewall on my server,
> and I forgot to turn iptables off.
Whenever I see mentions of "turning firewall off," that's a red flag, to
me. Is shorewall an independent thing, or is it a configurat
On Fri, 2011-06-17 at 15:28 +0800, Ed Greshko wrote:
> In addition, at times a better tool than a standard ping is to use a
> tool that uses SYN/ACK packets to confirm end to end connectivity.
And people tend to forget that ping is a networking tool, trying to use
it for other purposes. e.g. If I
Ed Greshko wrote:
> Anyway, good to hear all of your issues have been resolved.
Again, thanks for your help.
Much appreciated.
--
Timothy Murphy
e-mail: gayleard /at/ eircom.net
tel: +353-86-2336090, +353-1-2842366
s-mail: School of Mathematics, Trinity College, Dublin 2, Ireland
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users m
On 06/17/2011 06:17 PM, Timothy Murphy wrote:
> Thanks for your continuing help.
> As I mentioned, I searched (grep -r 192.168.1.7) on the laptop
> for the address that kept re-appearing, in /etc and /var/lib
> and it did not appear in either.
> Of course it might have been in some other form, eg a
On 06/17/2011 06:23 PM, Timothy Murphy wrote:
> Ed Greshko wrote:
>
>> In addition, at times a better tool than a standard ping is to use a
>> tool that uses SYN/ACK packets to confirm end to end connectivity.
> Such as ...?
>
tcptraceroute comes to mind. (I couldn't remember it earlier :
Ed Greshko wrote:
> In addition, at times a better tool than a standard ping is to use a
> tool that uses SYN/ACK packets to confirm end to end connectivity.
Such as ...?
--
Timothy Murphy
e-mail: gayleard /at/ eircom.net
tel: +353-86-2336090, +353-1-2842366
s-mail: School of Mathematics, Tri
Ed Greshko wrote:
>> I'm sure that is true.
>> But where does the machine keep the old IP?
>> I couldn't find it anywhere.
>
> That information is kept in the lease information and is why I've been
> trying to elicit explicit information with explicit question.
Thanks for your continuing help.
A
On 06/17/2011 03:06 PM, Joe Zeff wrote:
> On 06/16/2011 09:56 AM, Tim wrote:
>> Try some other addresses. Perhaps google.co.uk doesn't respond to
>> pings. Or, what happens when you try pinging it while on the gateway
>> computer?
> Until recently, mit.edu was a good choice. Checking, it no long
On 06/16/2011 09:56 AM, Tim wrote:
> Try some other addresses. Perhaps google.co.uk doesn't respond to
> pings. Or, what happens when you try pinging it while on the gateway
> computer?
Until recently, mit.edu was a good choice. Checking, it no longer
replies. However, using traceroute, I fou
Some additional information regarding DHCP.
As I mentioned, the lease information is retained by both the client and
the server.
Let's assume that this is not the first time the client has acquired an
IP address from the server. Let's also assume that the interface is
currently down and
On 06/17/2011 04:03 AM, Timothy Murphy wrote:
> Tim wrote:
>
>> On Thu, 2011-06-16 at 16:27 +0200, Timothy Murphy wrote:
>>> It's as though there is a lease somewhere
>>> and I have to wait for it to expire.
>> That's when you use commands like "dhclient -r" to try and get your
>> client to release
Tim wrote:
>> 2) I also had a problem with the default gateway,
>> but this is more a matter of understanding an elementary networking
>> issue. I guess what I need is a short primer on networking for
>> simpletons. Is there anything along those lines online?
>
> Have you searched the Linux docum
Tim wrote:
> On Thu, 2011-06-16 at 16:27 +0200, Timothy Murphy wrote:
>> It's as though there is a lease somewhere
>> and I have to wait for it to expire.
>
> That's when you use commands like "dhclient -r" to try and get your
> client to release its current lease.
>
> In the absence of being to
I seem to recall (many years ago)
having to access my linksys router
using a web browser , to 192.168.2.1 in my case,
and using Setup command.
username,password admin, admin.
maybe you have already done this?
HTH
Jack
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On Thu, 2011-06-16 at 13:00 +0200, Timothy Murphy wrote:
> Who decides the IP address of a device?
The DCHP server. And if it considers that 192.168.1 and 192.168.2 are
the same network, because its netmask puts the boundary at 192.168, you
may have lots of fun and games.
> 2) I also had a probl
On Thu, 2011-06-16 at 16:27 +0200, Timothy Murphy wrote:
> It's as though there is a lease somewhere
> and I have to wait for it to expire.
That's when you use commands like "dhclient -r" to try and get your
client to release its current lease.
In the absence of being told to use some specific I
Ed Greshko wrote:
>>I just commented out the IPADDR=192.168.2.7 in this file,
>>as well as NETMASK and GATEWAY, and re-booted,
>>but my IP address remains 192.168.2.7 .
>>In fact the route table has not changed.
>>
>>I ran "sudo grep -r 192.168.2.7 ..." on /etc/ and /var/lib/
>>on the laptop, and
Timothy Murphy wrote:
>Ed Greshko wrote:
>
>> On 06/16/2011 07:00 PM, Timothy Murphy wrote:
>>> 1) I was trying to change a LAN on my home-system
>>> from 192.168.1.0 to 192.168.2.0
>>> but I found it surprisingly difficult for example
>>> to change my laptop from 192.168.1.7 to 192.168.2.7 .
>>>
Ed Greshko wrote:
> On 06/16/2011 07:00 PM, Timothy Murphy wrote:
>> 1) I was trying to change a LAN on my home-system
>> from 192.168.1.0 to 192.168.2.0
>> but I found it surprisingly difficult for example
>> to change my laptop from 192.168.1.7 to 192.168.2.7 .
>> I made the change in /etc/sysco
On 06/16/2011 07:00 PM, Timothy Murphy wrote:
> 1) I was trying to change a LAN on my home-system
> from 192.168.1.0 to 192.168.2.0
> but I found it surprisingly difficult for example
> to change my laptop from 192.168.1.7 to 192.168.2.7 .
> I made the change in /etc/sysconfig/network-scripts/ifcfg
1) I was trying to change a LAN on my home-system
from 192.168.1.0 to 192.168.2.0
but I found it surprisingly difficult for example
to change my laptop from 192.168.1.7 to 192.168.2.7 .
I made the change in /etc/sysconfig/network-scripts/ifcfg-eth1
and deleted all the files in /var/lib/dhclient wit
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