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Using ISA to connect two Internal networks and filtering access from each other
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Using ISA to connect two Internal networks and filterin... - 6.Oct.2005 3:36:00 AM
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Ashokk001
Posts: 232
Joined: 6.Oct.2005
Status: offline
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Hello all,
Is it possible to connect two internal networks together and put some restrictions between them?. We need to allow access to another internal network but only on specific ports.
I have ISA 2004 standard edition installed and has three NICs. The idea is that one will be used for External access, one for Internal and third for another internal network.
We are also looking to put filtering software (Surf Control) on the ISA server to content filtering from both networks. Also the ISA will be used to access the internet from both networks.
Any ideas or have i got this completely wrong?
Ashok.
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RE: Using ISA to connect two Internal networks and filt... - 12.Oct.2005 6:07:00 AM
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rosscoid
Posts: 15
Joined: 1.Oct.2004
From: Buckinghamshire, UK
Status: offline
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Sounds like an easy setup. Route between the 2 internal networks with service (port) restrictions and NAT (or Proxy) both internal networks to the Internet.
I'd use Websense - I believe it's better than SurfControl!
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RE: Using ISA to connect two Internal networks and filt... - 17.Oct.2005 1:42:00 AM
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jitendra_pipalia
Posts: 8
Joined: 24.Sep.2005
From: dubai
Status: offline
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Hi Ashokk & rossciod
Ilike to use 4 network card .
I hev to vlan one is 172.16.33.0/24 and 172.16.34.0/24 .
Hence i want one interface should use 172.16.33.0/24
Second should use 172.16.34.0/24 .
My other 2 interface is used for adsl line.
means 3 interface for adsl 1
4th interface adsl 2 line.
My requirement is my 172.16.33.0/24 traffice should use adsl 1 for internet and my other 172.16.34.0/24 should use adsl 2 line.
How it is possible
can u guide me to do this set up.
Regards
jitendra
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RE: Using ISA to connect two Internal networks and filt... - 17.Oct.2005 8:17:00 AM
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rosscoid
Posts: 15
Joined: 1.Oct.2004
From: Buckinghamshire, UK
Status: offline
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Hi jitendra,
What you are trying to achieve is like 'source based routing' which isn't possible using just Windows server and / or ISA. Routing decisions, to use this ISP router or the other ISP router, can be made easily based on the destination of traffic by just adding routes in the OS, but to route depedning on source address you need a 3rd party plug-in such as RainConnect from Rainfinity.
RainConnect should be able to solve your problem - and do a load more too, like load balance the lines, let you add more ADSL lines in the future and control which protocol / services use which ISP lines.
Because of all this extra functionality it may be priced above what you would expect to pay, but take a look at the introductory slideshow on this site http://www.raininfo.co.uk
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RE: Using ISA to connect two Internal networks and filt... - 12.Nov.2005 9:49:04 PM
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Ashokk001
Posts: 232
Joined: 6.Oct.2005
Status: offline
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Sorry for not getting back
Thanks for your suggestions i have it setup the way you described/suggested. Created two internal networks and have a route relationship between these networks and a NAT to the external from both internal networks. Works fine.
I looked at websense but it was a bit out of our budget and surf control did offer some discount as our establishment is educational.
Thanks for your help.
Much appreciated!
Ashok.
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