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Back to the Basics - 26.Jun.2011 9:11:50 PM   
william.spearman.ctr

 

Posts: 6
Joined: 2.Dec.2010
Status: offline
All, I feel like a newbe. I don't understand the basic mechanism used by the web browser to access the ISA server and then have the request forwarded. Looking at netstat on my w/s, I see the ISA connection as source port <random>, destination port 8888 (the port we designated for proxy use). Does this mean that the request to get to https://anywhere.com is encapsulated in a plain vanilla packet destined for port 8888 on the proxy? How does the proxy know what address i need to get to and what port I want to use to get there? Can someone enlighten me about this most basic of processes?

Post #: 1
RE: Back to the Basics - 5.Jul.2011 10:05:36 AM   
paulo.oliveira

 

Posts: 3472
Joined: 3.Jan.2008
From: Amazon, Brazil
Status: offline
Hi,

the client is usually configured as web proxy client, if thatīs not the case, then when request is made (as SecureNAT), ISA firewall will forward the web request to ISA web proxy filter.

The URL requested by the client is used by ISA firewall to make the request on behalf of the client and retrieve the content.

Basically, thatīs how it works.

Regards,
Paulo Oliveira.

_____________________________

Microsoft Premier Field Engineer (PFE)
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(in reply to william.spearman.ctr)
Post #: 2

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