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Old 4th February 2009, 16:03
grasomega grasomega is offline
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Question ISPConfig with multiple ISPs - what's the correct way?

Hi, everyone!

I'm trying to get some redundancy with the connection for this ISPConfig server.
I'm not sure what is the best way to do it. I don't have AS numbers.
Is it possible to do it without AS numbers? Can I just use two NICs with static IPs?
Aside setting up the second IP in the ISPConfig, what should I setup?
I consider adding the second address in the DNS setup, e.g.:

www.domain1.tld (ISP1 on eth1)
www.domain1.tld (ISP2 on eth2)

The server has only one gateway set, through ISP1 on eth1.
Would it respond correctly to requests coming on eth2 ?

What's the easiest way of doing this?

I should mentoin that I also can request multiple IPs from both ISPs and use a multihomed router in front of the server, but without AS numbers, I'm not sure if this is a good idea (I'm thinking of setting up pfsense without NAT).

I would, actually, be content with modifying manually some settings, as long as I don't have to fiddle with DNS, as it would mean to wait for propagation, which is exactly what I'm trying to overcome.

Please shed some light on the correct path.


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Old 6th February 2009, 14:27
grasomega grasomega is offline
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I think I will try to use a router in front of the server (with NAT) which accepts 2 WAN connections and setup the server with 2 IPs on the same physical interface with IPs on the same C class and setup SNAT from the ISP1 IP to the IP1 (on the server) and, respectively, SNAT from ISP2 IP to the IP2.
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