Re: Auto Detect proxy Settings
- From: "Jim Harrison" <jim@xxxxxxxxxxxx>
- To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
- Date: Mon, 21 Jan 2002 06:26:23 -0800
WPAD basically works three ways:
1. DHCP 'inform' request from the client to obtain any special options (of
course, client has to be DHCP to use it). This gives the client the proper
request format.
2. Browser query for 'http://wpad:80/wpad.dat'
3. FW client query for 'http://wpad:80/wspad.dat'
In the last two cases, either DNS or WINS static entries moist exist for
"wpad" so that client requests can be resolved to an IP by the client.
As far as non-local subnet clients not being able to use DHCP, you might
want to look into your router's documentation for "IP helper" or "UDP
helper" settings. These allow DHCP broadcasts to reach off-subnet DHCP
servers.
..of course, none of this works if you disable "Publish auto discovery
information" in the server properties tab...
Jim Harrison
MCP(NT4, W2K), A+, Network+, PCG
http://isaserver.org/authors/harrison/
Read the books!
----- Original Message -----
From: "Jon Booth" <jon@xxxxxxxxxxxxxx>
To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
Sent: Sunday, January 20, 2002 20:56
Subject: [isalist] Auto Detect proxy Settings
http://www.ISAserver.org
Could someone please explain to me how this works. Does it work similar to
DHCP where the browser would broadcast looking for a proxy server. Does
this mean that clients on other subnets won't be able to pick it up?
Thanks
Jon
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