Cigarette Pack Size Ethernet Bridges?

Cigarette Pack Size Ethernet Bridges?
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Subject Author Date
Cigarette Pack Size Ethernet Bridges? Will 09-13-2006
Posted by Will on September 13, 2006, 2:45 pm
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Does any vendor make ethernet bridges that are solid state and about the
size of a cigarette pack? Ideally I would like to find a vendor that
offers these as plug in modules into a single rack mounted frame, so I could
get a lot of them in a tight space.

I want to use one of these in front of each segment on a 12 segment
firewall, to filter any source IPs on the segment or filter by Mac address.
The spoof detection on my firewall is harder to use than it should be and
introduces reliability issues I don't want to deal with.

I know that Allied Telesyn, Canary, and others make small copper to fibre
converters that are small and fit into rackmountable enclosures. I am
hoping that maybe one of them had the foresight to add in some ethernet
bridging capabilities to those.

--
Will



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Posted by Al Dykes on September 13, 2006, 2:47 pm
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>Does any vendor make ethernet bridges that are solid state and about the
>size of a cigarette pack? Ideally I would like to find a vendor that
>offers these as plug in modules into a single rack mounted frame, so I could
>get a lot of them in a tight space.
>
>I want to use one of these in front of each segment on a 12 segment
>firewall, to filter any source IPs on the segment or filter by Mac address.
>The spoof detection on my firewall is harder to use than it should be and
>introduces reliability issues I don't want to deal with.
>
>I know that Allied Telesyn, Canary, and others make small copper to fibre
>converters that are small and fit into rackmountable enclosures. I am
>hoping that maybe one of them had the foresight to add in some ethernet
>bridging capabilities to those.
>


Lots of poeple make tiny single board computers with a variety of
interfaces and with a Linux port for the CPU and drivers for the IO
devices. I know there are some with multiple ethernet jacks and they
are frequently used as routers. Linux is Linux. You can make it a
filtering bridge if you want.

SysAdmin magazine always has adverts for this stuff. Maybe you can
find the vendors on the website.

         http://www.samag.com/

--
a d y k e s @ p a n i x . c o m
Harrison for Congress in NY 13CD www.harrison06.com
Don't blame me. I voted for Gore. A Proud signature since 2001

Posted by on September 14, 2006, 3:27 pm
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Al Dykes wrote:
> >Does any vendor make ethernet bridges that are solid state and about the
> >size of a cigarette pack? Ideally I would like to find a vendor that
> >offers these as plug in modules into a single rack mounted frame, so I could
> >get a lot of them in a tight space.
> >
> >I want to use one of these in front of each segment on a 12 segment
> >firewall, to filter any source IPs on the segment or filter by Mac address.
> >I know that Allied Telesyn, Canary, and others make small copper to fibre
> >converters that are small and fit into rackmountable enclosures. I am
> >hoping that maybe one of them had the foresight to add in some ethernet
> >bridging capabilities to those.

Have you considered a 24 port switch that supports VLANs?
This could be used to create 12 'virtual' 2 port switches.

To get the manageability you want you will have to spend a bit
but it will be less that some of the alternatives.
I know that for example a Cisco Catalyst 2950 would do.

Google - [two port ethernet switch]

As far as I can see following are all Copper-Fiber convertors and
may not be suitable for you. You need to have a look yourself
though since I just had a glance.

Allied Telesyn AT FS201 2-Port Ethernet Switch (AT-FS201-20)
http://www2.shopping.com/xPO-Allied_Telesyn_AT_FS201_AT_FS201_20

It's made as a 10/100 convertor. Perfect if 10 is OK
but it looks like they do GBE ones too.

today announced the AT-WLMT wall-mount bracket set
for its MC- and FS- series of standalone and bridging
media converters. The AT-WLMT brackets are
particularly useful in locations where a single media
converter needs to be physically anchored.

Available in packs of 10, the AT-WLMT includes all
necessary fitting components to ensure trouble-free
and fast installation. The AT-WLMT can be used
for all of the Allied Telesis bridging media
converter series (AT-FSxxx & AT-GS2xxx for
Fast Ethernet and Gigabit).

http://www.alliedtelesyn.co.uk/en-gb/products/cat/?cid=8

Google - [three port ethernet switch]

Google - [five port ethernet switch] - These are cheap and common
but most not managable.
Try [four port too]

http://www.engineeringtalk.com/news/kor/kor114.html


Posted by Walter Roberson on September 14, 2006, 3:43 pm
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>Al Dykes wrote:
>> >Does any vendor make ethernet bridges that are solid state and about the

>> >I want to use one of these in front of each segment on a 12 segment
>> >firewall, to filter any source IPs on the segment or filter by Mac address.

>Have you considered a 24 port switch that supports VLANs?
>This could be used to create 12 'virtual' 2 port switches.

Alternately, there is a feature sometimes called PVE (Private Virtual
Edge). Supported on some Cisco and Linksys devices amongst others.
Doesn't inherently give you the advanced filtering desired, but
should be more secure (in theory) than using VLANs.



Posted by Will on September 15, 2006, 4:16 pm
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> Alternately, there is a feature sometimes called PVE (Private Virtual
> Edge). Supported on some Cisco and Linksys devices amongst others.
> Doesn't inherently give you the advanced filtering desired, but
> should be more secure (in theory) than using VLANs.

What are the greatest typical weaknesses in VLANs, and how does PVE improve
on that?

--
Will



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other useful resources:
The Federal Communications Commission (FCC)
Telecommunications Industry Association
Electronic and Software Security Products and Services
International Telecommunication Union

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