Logic behind "Bypass Proxy for Local IP addresses"

  • Thread starter Thread starter Chas
  • Start date Start date
C

Chas

Hi

Could someone tell me the logic behind the tickbox
for "Bypass proxy for local IP addresses" in the IE Proxy
settings dialog box?

I want to know exactly how IE decides if an address is
local or not and hence when it goes through the proxy and
when it does not.

Is a local IP address defined as one on the same IP subnet
as the workstation or is there another way that it decides?

Does it depend on the version of IE (5.5 or 6.0)?

Thanks
Chas
 
I suspect that anything considered "Intranet" is bypassed while anything
else is not. You can prove this to yourself by starting a traffic sniffer
(e.g. www.fiddlertool.com) and then going into IE Tools | Options and
setting the checkbox. Then try hitting http://yourmachinename. Note that
the proxy is bypasssed. Now, try http://yourmachineIP. Note that the proxy
is not bypassed.

--
Thanks,

Eric Lawrence
Program Manager
Internet Explorer Trust

This posting is provided "AS IS" with no warranties, and confers no rights.
 
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