Showing results for 
Search instead for 
Did you mean: 

Problem with Wpad.dat file on ZoneDirector 3000

New Contributor III

I’ve got ZoneDirector 3000 with ZoneFlex 7363 APs, with two WLANs – Internal and Guest. I have changed my IP addresses on the network and would like to change wpad.dat on ZoneDirector to point to new proxy server IP. I navigate to “Configure” – “WLANs”, click on “Edit” my Internal network, click “Advanced Settings” and in “Auto-Proxy” it set to Wpad.dat that is saved on ZoneDirector with address I clicked on the link and downloaded wpad.dat file, changed IP addresses and saved it on my PC, clicked on “Browse” button selected my new wpad.dat file and clicked “Import”, I get a warning that wpad file will be overwritten, clicked OK and there is no change. It would not replace the file. Is there a way of removing the wpad.dat file from ZoneDirector or somehow force it to replace it? Can it be done using Command Line Interface?

Thank you.


Esteemed Contributor II
I have never tried WPAD.dat import, but here is some internal knowledge base information that I hope can be helpful.

The Auto-Proxy feature automatically configures client browsers with Web proxy settings when the user joins the wireless network. Clients locate the proxy script according to the Web Proxy Auto Discovery Protocol (WPAD). WPAD uses discovery methods such as DNS and DHCP Option 252 to locate the configuration file. To use this feature, you must designate where the wpad.dat file is to be stored. Click Choose File to upload a wpad.dat file conforming to the WPAD protocol to ZoneDirector, or select External Server and enter the IP address of the external DHCP/DNS server where the file is stored.

  • Internet Explorer supports DNS and DHCP Option 252, while Firefox, Chrome and Safari support the DNS method only.
  • If the wpad.dat file is stored on ZoneDirector, only one file can be uploaded and this file applies to all WLANs that use the ZD-stored file.
  • Up to 8 wpad.dat files can be saved on external servers in addition to the single wpad.dat file that can be stored on ZoneDirector.  
  • If Wireless Client Isolation, ACLs or Web/Guest Captive Portal are enabled on the WLAN, additional ACL may be required to allow wireless clients to access the Web proxy server and ZD Captive Portal redirection page.

Find the Auto-Proxy setting under WLANs > Advanced Options

The desired behavior is:
  • The client connects to the WLAN and acquires IP Address, DNS Server and “” domain from the internal server.
  • The client will look for “” and download it from the internal server. A Preauthentication ACL will allow unauthenticated client to get it. The PAC file instructs the client that a proxy server exists and must be used using the TCP port 8080.
  • The user can now open a browser and ask for Google website using a Proxy Server.
  • The WLC intercept the request and redirects the user to the Web Authentication page (usually
  • After the authentication the client can reach the server using the TCP Port 8080 and access to the Google website.
  • Users without Proxy Auto Configuration should receive a warning page asking to configure the browser in a proper way.

New Contributor III
Thank you Michael for your reply.  But all I'd like to do is to replace current wpad file with the new one and not able to, it seems that I cannot write to "/upload" directory on ZD. So, if you know the way of editing files in CLI? Thanks.

I don't... it might take some research by a Tech Support engineer.