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Two Internet Connections. One ISA server - 29.Oct.2006 10:27:12 AM

d_kc

Posts: 13
Joined: 3.Oct.2006
Status: offline

Hey,

My situation is that I have two internet connections and i want to load balance (?) without having to buy any new hardware.

The satelite connection comes down from the dish and connects to a switch and from there it goes to the ISA server, the VoIP router and the mail server with three different IPs.

The internal network currently gets http & ftp access from the isa server via this satellite connection.

Now we recently acquired a DSL connection, and i would like to have users use this connection for browsing only since the satellite connection has become overloaded. There is no option of getting an overall faster connection.

When I plug the DSL connection into ISA. It works, but users complain of having very very slow access when using the mail server. How can i correct this ? Can i add a second network card to the mail server and allow users to access it internally or something ..rather than going out the DSL connection and returning back to the satellite connection.

Please help ...i'm pretty new to all this. But i'm learning.

Post #: 1

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RE: Two Internet Connections. One ISA server - 14.Nov.2006 6:01:43 AM

Nandox7

Posts: 3
Joined: 31.Mar.2005
Status: offline

I also have that situation.
I have two ADSL connections and i'd like to have failover and/or load balance on them.
Did you managed to find anything for this? Any way to configure this on a Windows 2003 with Isa server?

Any help is welcome.

(in reply to d_kc)

Post #: 2

RE: Two Internet Connections. One ISA server - 28.Nov.2006 9:29:33 AM

d_kc

Posts: 13
Joined: 3.Oct.2006
Status: offline

anyone ?

(in reply to Nandox7)

Post #: 3

RE: Two Internet Connections. One ISA server - 29.Nov.2006 10:31:57 AM

elmajdal

Posts: 5061
Joined: 16.Sep.2004
From: Lebanese in Kuwait
Status: offline

ISA by default, in all its versions, does not support multiple gateways( multiple WAN ).

to support mutiple wans, u have 2 options:
1- buy a router that supports multiple WANS and put it infront of your ISA
example : CISCO 1841

2- check the script in this thread : http://forums.isaserver.org/m_260001200/tm.htm#000011

_____________________________

Tarek Majdalani

MS Forefront Edge Security MVP
Website : http://www.elmajdal.net/ISAServer
New Section : http://www.elmajdal.net/Win2k8

(in reply to d_kc)

Post #: 4

RE: Two Internet Connections. One ISA server - 14.Jun.2007 9:25:24 AM

Vuurvos

Posts: 1
Joined: 14.Jun.2007
Status: offline

I have pretty much the same desire

Currently we have a setup with 2 ISA servers (with 2004) :
ISA01 is proxying over the corporate (1.5M) SDSL line, meant to host things like the Extranet, the OWA site etc.
ISA02 is proxying over a secondary ADSL2 line, highly overbooked, highspeed, and cheep... but ofcause a 'little' unreliable.

I was hoping to create a solution where 1 ISA 2006 server would be able to deliver all mission critical stuff and outside requests for VPN, OWA, SMTP and extranet routed through the SDSL line, and all minor important stuff like the usual browsing and downloading of users through the ADSL2 line, failing to SDSL when the ADSL line would be down.

As of yet, I haven't found much that tells me this is even a viable option, so I'm hoping some of you might have an Idea? (reading this thread, I'm afraid there is little chance, and that I should still use 2 ISA servers where the server connected to ADSL is pointing to the other one to resolve websites that are failing on the fist ome. (please tell me I'm wrong, and that should be able to solve it with one server/servercluster?)

(in reply to elmajdal)

Post #: 5

RE: Two Internet Connections. One ISA server - 14.Jun.2007 10:51:52 AM

elmajdal

Posts: 5061
Joined: 16.Sep.2004
From: Lebanese in Kuwait
Status: offline

Hi,

i accomplish this for few customers, here what i did

Two ISA Server 2004 EE, load balanced, but each has different IP from different ISP on the External NIC.

in this way, Internal Requests will be load balanced and will have the fail over option.

HTH,
Tarek

_____________________________

Tarek Majdalani

MS Forefront Edge Security MVP
Website : http://www.elmajdal.net/ISAServer
New Section : http://www.elmajdal.net/Win2k8

(in reply to Vuurvos)

Post #: 6

RE: Two Internet Connections. One ISA server - 14.Jun.2007 1:25:17 PM

habibalby

Posts: 126
Joined: 20.May2006
From: Kingdom of Bahrain
Status: offline

Hi,
This is the same what i have implemented in one of Our Customer.

1. Two ISP coming to the ADSL
2. Each going to the the External Interface of ISA01 and the 2ng to ISA02.
3. Internal interface having internal LAN IP.
4. NLB is configured, offcourse using Enterprise Edition.

BR,
Habibalby

_____________________________

For online help with ISA Server 2004 & 2006 SE or EE. Please call on +973-39228431

(in reply to elmajdal)

Post #: 7

RE: Two Internet Connections. One ISA server - 14.Jun.2007 1:31:52 PM

elmajdal

Posts: 5061
Joined: 16.Sep.2004
From: Lebanese in Kuwait
Status: offline

Hi alby

i've just found this : http://forums.isaserver.org/m_2002040238/mpage_1/key_/tm.htm#2002040238

seems like this setup is getting widely used

Thanks,
Tarek

_____________________________

Tarek Majdalani

MS Forefront Edge Security MVP
Website : http://www.elmajdal.net/ISAServer
New Section : http://www.elmajdal.net/Win2k8

(in reply to habibalby)

Post #: 8

RE: Two Internet Connections. One ISA server - 15.Jun.2007 12:12:45 AM

habibalby

Posts: 126
Joined: 20.May2006
From: Kingdom of Bahrain
Status: offline

Hi elmajdal,

Yeah, this solving the issue of Redundency if the Route doesn't support QoS for WAN Link Seggrigation.

Hope microsoft will come up with something similar in the next version~!

Br,
Habibalby

_____________________________

For online help with ISA Server 2004 & 2006 SE or EE. Please call on +973-39228431

(in reply to elmajdal)

Post #: 9

RE: Two Internet Connections. One ISA server - 15.Jun.2007 1:25:48 AM

elmajdal

Posts: 5061
Joined: 16.Sep.2004
From: Lebanese in Kuwait
Status: offline

Yah, and i believe Supporting Multiple WAN will be available with ISA Server 2008,.

Thanks,
Tarek

_____________________________

Tarek Majdalani

MS Forefront Edge Security MVP
Website : http://www.elmajdal.net/ISAServer
New Section : http://www.elmajdal.net/Win2k8

(in reply to habibalby)

Post #: 10