Proxy exceptions in Firefox and Internet Explorer

Silas — Thu, 07 Jun 2007 08:13:20 +0000

In my office I have to configure a proxy for several Browsers on different Workstations. Also I’ve to add some exceptions for the proxy. I don’t want that local IP’s passes through the proxy. So i have to add it to the exception list in the browser.

In the Internet Explorer you can use a * (star) as wildcard like this 172.17.*. But in Firefox that won’t work. In Firefox you have to add the whole Network-ID with the relevant suffix like this 172.17.0.0/16.

Examples:

You want the whole local IP-Address range in your exception list. Ask your network administrator for the IP-Configuration.

IP: 172.17.72.123
Subnet: 255.255.0.0

When you get this data from your administrator you have to enter the following in your exception list:

IE: 172.17.*
FF: 172.17.0.0/16

If you get diffrent data such as this:

IP: 192.168.0.12
Subnet: 255.255.255.0

Then enter the following in your exception list:

IE: 192.168.0.*
FF: 192.168.0.0/24

I hope that is a usefully hint. If you have any questions please post a comment.

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Proxy exceptions in Firefox and Internet Explorer