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Backup routes when ISP fails - 21.Aug.2008 4:08:21 AM

fergusfog

Posts: 5
Joined: 15.Aug.2008
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* I'm not talking about internet connection failover - I know this has been done to death! *

Like the web chaining rules let you specify an upstream server if the primary route isn't there, can you do that for all ISA traffic?
2 sites, both with internet connections but MPLS between them - if the local connection goes down, I want ISA to chain to the ISA in the other site and get out that way.

Any way of doing that?

Thanks chaps,

Ferg.

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RE: Backup routes when ISP fails - 21.Aug.2008 9:35:03 AM

tshinder

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Joined: 10.Jan.2001
From: Texas
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Hi Ferg,

There's really no way to do this. Firewall chaining, unlike Web Proxy chaining, doesn't have this type of failover functionality.

Tom

_____________________________

Thomas W Shinder, M.D.
Sr. Consultant/Technical Writer
Prowess Consulting http://www.prowessconsulting.com/
Blog: http://blogs.isaserver.org/shinder/

GET THE NEW ISA 2006 Book!: http://tinyurl.com/2gpoo8

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RE: Backup routes when ISP fails - 21.Aug.2008 9:37:35 AM

fergusfog

Posts: 5
Joined: 15.Aug.2008
Status: offline

Thanks Tom, yeah that helps. Not the technology, just the answer. ;-)

Just in case anyone else reads this, we've decided on a manual DNS-based failover, with short TTL so we can redirect the clients if either the ISA array or the internet connection fail.

Ferg.

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RE: Backup routes when ISP fails - 21.Aug.2008 9:38:47 AM

tshinder

Posts: 47408
Joined: 10.Jan.2001
From: Texas
Status: offline

Hi Ferg,

That's a good plan. Not automatic, but it certainly gets the job done.

Thanks!
Tom

_____________________________

Thomas W Shinder, M.D.
Sr. Consultant/Technical Writer
Prowess Consulting http://www.prowessconsulting.com/
Blog: http://blogs.isaserver.org/shinder/

GET THE NEW ISA 2006 Book!: http://tinyurl.com/2gpoo8

(in reply to fergusfog)

Post #: 4