Proxy PAC files (redundent Proxy servers?)

Hi ok so i can set up a pac file to choses proxies based on network the Client is on and what site i am trying to get to.

but how do i set it up to sence if a proxy server is down and to use a secondery one??

is there any way to check if a proxy server is down completly (no ping) or is its still alvive (pinging) but not actauly responding to client requests and then set a different proxy?

Thank you

Aaron
LVL 16
Aaron StreetInfrastructure ManagerAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

SPHCommented:
Check the PAC guide from Netscape: http://wp.netscape.com/eng/mozilla/2.0/relnotes/demo/proxy-live.html

You can specify multiple servers in the PROXY return variable and your browser should iterate through each one in order until it finds one that is up.

In other words, if your return is 'PROXY a; b; c; DIRECT', the browser will first use proxy server 'a', and if it is unable to connect then it will switch to using 'b', then 'c', then a direct connection.
1

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Internet Protocols

From novice to tech pro — start learning today.