I already gave you a link to the bridge + netfilter howto in the very first reply, what else is there to know?

Hi.

i will preffer if someone do it for me and i pay to him. rather then doing it my self and managing my customers, this is really very big problem for me.

rather then reading all that tutorial , understanding , applying diffrent changes etc. for me this is long process. i am also not expert in that...

In that case, might be a good idea to tell where you are? And where is the computer, which needs to be configured?

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Thank you nimnull !

I live in United Arab Emirates.

And my both windows and linux servers are in London Data center. in Virtual private rack.

Interesting. Virtual private rack. And I suppose one need to put there a Virtual Linux box and set up a virtual firewall.

How do you imagine one can do it?
And what is Virtual private rack? Does it exist? Is windows as well virtual?

Sorry, but really, how can it be done?

my dear. one of my friend did this 100% . he also provide same services what i provide.

The same topology he setup on vlan. and his services are working very fine now.

yes.

windows and linux both are in same data center in virtual private racks.
both windows and linux has 2 NICs.
one to main switch and one to private. like: windows <------------> linux . or linux <-------------> windows.

Now the job is to accept data on eth0 linux . and send it on eth1 linux ---------------> windows.

so the linux will be in bridge mode. and it will be like this is placed between main switch and windows machine.
it must be in transparent mode.

So these are all vmware machines and vSwitches (or similar) In that case you need to configure the virtual networking through whatever means you have and then, yet again, just add a bridge interface on the linux box to make traffic flow between eth0 and eth1. This is sill trivial, and your descriptions seem to make it sound much more serious than it is. LQ.org is *NOT* the right place to seek Linux consultancy.

Hi.
What do you mean by bridge interface on linux box ?

i already have 2 NICs on linux box. one to public IP and second to private IP ( localy to windows machine ) is that you mean ?

Have you even clikced the link that we've both given you? You say you want to bridge two interfaces, yet one is on a public IP on is private?? If that's what you're saying, then clearly you don't know what bridging is at all.

Hi.


I got information from linux consultancy that layer2 transparent packet filtering is posisble with Ebtables. Not with Iptables.

ebtable works same like a Cisco asa 5520 works on layer2 transparent mode. And there is no need for additional interfaces.

let me know if this is correct , so i can pay money to that engineer...


Thanks.

right, and so where are your two interfaces in the same layer 2 space? I've not seen any mention of any yet.

In general, transparent layer 2 filtering is horrible. It's the sort of thing you only do as a genuine last resort. I would personally urge you to present the problem you are facing, and not your percieved solution, to someone - including people here, and let *THEM* suggest how to actually deal with the root causes of the issues you're facing. Without wishing to sound rude, it honestly seems that you don't have a full enough grasp on what you're requesting for it to be a sensible way forward, and the last thing (I hope) you want is for you to pay someone far too much money to achieve something in a convoluted way when it could be done much better and more simply by letting someone with proper subject expertise see the problem in it's entirety.