[ExchangeList] Re: SMTP Load Balancer

  • From: Mathieu CHATEAU <gollum123@xxxxxxx>
  • To: "Mike French" <mike.french@xxxxxxxxxxxxxxxxxxx>
  • Date: Tue, 29 Aug 2006 20:27:00 +0200

http://www.msexchange.org -------------------------------------------------------

Hello Mike,

except if you want high availability, smtp is a really good protocol for dns round robin.

Many isp just do this through round robin.

Is all about the smtp, or also the firewall ? If you want firewall failover, F5 is not really the good way.

You will want Cisco pix or netscreen or checkpoint (on nokia, that really rock!).

To stay on Microsoft, you can also use ISA 2004 (or 2006 in RC now), as an array to do firewall.

In the same way, you can achieve high availability trough an array of ISA with NLB, and smtp gateway with NLB.


Hope it will help,




Tuesday, August 29, 2006, 7:52:12 PM, you wrote:


Kinda off topic? But I have to ask:




Multiple Firewalls (5) on the perimeter

Single Large pipe to the INET


We need to load balance SMTP traffic to the Perimeter firewalls (SMTP is the only concern), if firewall 1 is saturated then go to firewall 2 and so on. 


My question is, since I have little experience with load balancers, anyone have a short list of vendors that they have had good luck with that provides this type of load balancing? I would imagine this scenario would be pretty simple. F5 BIG-IP for instance? Or is that over kill? Just looking to narrow down a search without having to “Drink the Kool-aid” from vendor contacts…… 


Mike French

Acclaim Networks

754 Port America Place

Suite 150

Grapevine, TX 76051

(888) 327-5647

(817) 488-1030 x104

FAX (817) 488-1103




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