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  GigE means 1Gbps or 2Gbps (Rx and Tx together)         


Author: binosh
Date: Dec 31, 2007 01:04

It may be a very basic question.
But nobody is able to give an answer citing some statndard (I couldn't
find a proper answer in IEEE 802.3 also)

My assumption is that it is 2Gbps (Rx, Tx together)

Can somebody help me on this? (Please also mention where I can find
the documentation for the same.)

Thanks in advance.
-luv
4 Comments
  Totally different IP's on the same LAN?         


Author: Tomás Ó hÉilidhe
Date: Dec 29, 2007 08:25

Imagine a common home DSL internet setup:

1) You have a router that has a public IP address on the WAN port
(I'll pick an entirely random value of 73.52.66.5) and a private IP
address on the LAN port (192.168.1.1).
2) Your two home PC's are 192.168.1.3 and 192.168.1.4.
3) The router uses Network Address Translation to allow the home PC's
to surf the web.

(Ok, nothing exciting there)

Now, the router has a feature called "IP Passthrough" whereby the IP
address of the WAN port can become the IP address of one of the machines
on the LAN. Forgetting for the moment the effect this would have on the
router's NAT facility, I'd like ask how the following setup could work:

1: You have a LAN with two machines and a router.
2: Router's LAN port address = 192.168.1.1
3: Machine One's address = 192.168.1.3
4: Machine Two's address = 73.52.66.5 (because of IP passthrough)

I'm curious what would happen if you tried to ping Machine One from
Machine Two. Firstly assume that both machines have the following setup:
Show full article (1.95Kb)
3 Comments
  M-I,5.Persecu tion - BB C Newsca sters Lie & Den y Theyre W atching Me         


Author: fvfefv
Date: Dec 26, 2007 01:16

MI5 Persecution: BBC Newscasters Lie & Deny They're Watching. Me

Central to the persecution campaign waged against me for some. nine years
now by the Security. Service is their use of the media, and in particular
the broadcast media, to make clear to me that I. am under surveillance and
being watched. within my own home, even by BBC newscasters while they read
the news. This. is really an act of arrogance; MI5 and their tools in the
television and radio are so sure that they can never be caught,. that they
have many times. made explicity clear on broadcast programmes that they are
as capable of seeing me as I am of seeing the broadcast. pictures. Even
when they have known I. am taping the programmes they still carry on this
practice; for examples of TVand radio. presenters caught "in action", see
the Evidence. area of my website.

If you wish to. reply to this article......
then please include. your name and fax number! I provide the means for
recipients to send me their thoughts on the topics discussed, but ask. that
you provide me with your fax number or email address if you. require a
response. Also would you please send not more than one or two. pages, if by
fax.. Thank-you!

It started with a Newscaster, and it continues. with Newscasters today
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no comments
  M,I.5'P ersecution Fou r Years of M I5 Persec ution Po sts on Inte rnet Newsgro ups         


Author: vmemfvm
Date: Dec 26, 2007 01:00

Four Years. of "MI5 Persecution" Posts on Internet Newsgroups

For approximately the first three years of the. MI5 persecution, from June
1990 until late. 1992, I kept as quiet as possible, in the hope that by not
reacting, MI5s interest in me would decrease and they. would simply go away
of their own accord. This is. the sort of behaviour some people employ
against bullies; if the bullies arent getting a reaction,. then they might
simply go. away and victimize someone else.

Unfortunately, this tactic didnt work. The quieter. I became, the more
shrill and hysterical the noise from the Security. Service operatives. For
about two years I didnt watch TV news at all. Yet. this only heightened
their obsessed. fixation; they continued to follow me wherever I went, they
continued. to induce harassment at work by managers and fellow workers, and
they continued. to encourage me to commit suicide. They seemed to regard my
refusal to react as a crime which. they would have to "put right" by ever
more extreme forms of. abuse.
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  Fiber vs cat6         


Author: NewsGroup
Date: Dec 23, 2007 14:12

We are setting up a production room with 6 high capacity laser
printers/presses. they will be connecting to an imposition server and the
bandwith between the server and laser workstations will be maxing out on a
copper connection. We were going to run a fiber connection directly from
the swith in the server room so a switch in the printer/press room.
Somebody told me that fiber wouldnt be neccessary unless the distance was
greater. This is only about 50 ft. If all presses are drawing bandwidth
at the same time wouldndt fiber be better?

Any ideas appreciated.

CR
1 Comment
  VPN Vs VLAN         


Author: Tomás Ó hÉilidhe
Date: Dec 21, 2007 12:54

I'm trying to read up on Virtual LAN's, and I keep coming across Virtual
Private Networks.

Are these the same thing?

As far as I understand, the purpose of a VLAN server is to provide an
outside host with a place on a LAN so it's as if the host in question is
actually sitting on the LAN's hub.

--
Tom
11 Comments
  Force NIC to 100 Mbps         


Author: Tomás Ó hÉilidhe
Date: Dec 19, 2007 16:31

I have a desktop computer that's a few years old, I ressurected it just
there a few days ago. The NIC in it is the "3Com EtherLink III ISAPNP",
also known as the 3Com 3c509b, which is about a decade old at this stage.

The card is capable of both 10 Mbps and 100 Mbps. The card was designed
in the period when 100 Mbps was being phased in and so while it *can* work
at 100 Mbps, it defaults to 10 Mbps when it checks the line (irrespective
of whether other hosts on the collision domain are working at 100 Mbps).

I have a boot disk for the card which lets me set its settings (e.g. I
can set it to work in Full Duplex), but it doesn't let me choose whether to
use 10 Mbps or 100 Mbps.

Does anyone know of a way of forcing a NIC to 100 Mbps? Or does anyone
have experience with this particular card and know a way of getting it to
work at 100 Mbps? I'm working with Windows XP Pro SP2.

Thanks for reading

--
Tom
3 Comments
  Samba share safe within LAN?         


Author: Tomás Ó hÉilidhe
Date: Dec 19, 2007 16:29

I have four computers on a LAN with private IP addresses (e.g.
192.168.1.*), and a router on the LAN which provides access to
the Internet.

I have considered setting up a password-free file share on one of the
machines and then setting up the machine's firewall so that it only
allows file-sharing to computers within the same network.

How safe is this? The machine in question is running Windows XP Pro
SP2, and has ALL of the latest Windows updates.

In theory, any requests coming from outside the network should be
ignored because of the firewall, but I've seen a video on the web of
people exploiting Samba and gaining full access.

Is it advisable to have a password-free Samba share like this even if
my firewall blocks WAN requests?

Another thing, if you have a password on your Samba share, is there
any way of putting in a time delay between password requests? I've seen
people crack Samba using a "dictionary attack", but such an attack would
not be possible if there was a delay of about ten seconds between
password requests.
Show full article (1.43Kb)
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  General Network Help         


Author: NoVaBoiler
Date: Dec 18, 2007 03:27

We are having an issue that I could use some help on.

We need to connect two networks together, we'll call them network 1
and network 2. I am an administrator on network 1 but not on network
2. We've been provided an IP address for network 2 and a port on
their main switch.

Our network (network 1) has a totally different set of network
address
(3 class C subnets) from network2. We'll say Network1's subnets are
192.168.64.X
192.168.65.X
192.168.66.X
and
Network2's subnet is
192.2.10.X

Network1 is configured in a star topoly with a mix of Cisco 6509
catalysts and Cisco 3550s. We have a central 6509 with a supervisor
module setup as a basic router. The router inerface has the VLANs
setup for each of our subnets.
Show full article (1.67Kb)
no comments
  Change IP and MAC address         


Author: cell
Date: Dec 10, 2007 01:59

Dear all,

I want to change the MAC address and IP of an ethernet device
dynamically in the network which the device is made by myself.

I want to ask whether I change the IP firstly or the MAC address
firstly if I cannot change them in the same time.

Thanks!
1 Comment
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