Password Passthrough for Watchguard X550E WebBlocker

I'm trying to find a way to create a passthrough for certian users to gain access to blocked sites. The owner and marketing person would like to gain access to so they can promote their business... however, it's on a blocked list on the WatchGuard X550E. Typically other firewalls bring you to the blocked page and has a link where you can enter a passthrough password.  I'm not getting that.  It comes up and says "request denied by watchguard http proxy - WebBlocker."  
Anyone have any idea how to create a link or something on that page so the owner can click it and enter a password which will allow him access to

Thanks guys!!!
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Two ways to accomplish what you wish:
1. If the machines are on static IP then create one more HTTP proxy service and configure as below:
    Enabled and Allowed; from specific-ip-address/range/subnet; to public-ip-of-website
   Please note if there are more than one website please enter all addresses; or enter URL and WG would do one time ns-lookup on them and add all the addresses. If the addresses change at a later point you would need to modify this service manually.
Another option here is to either grant them full access [using HTTP filter service instead] or disabling the specific category under webblocker categories [or adding webblocker exception] and not configuring the to part.
2. If the client are having dynamic IP address, then you can enable Java applet based authentication for them, where if they wish to access a restricted website or for complete access they would first need to log on to java applet, get authenticated and then browse internet. Depending on version of WG software they might need to relogin if the java applet is killed for any reason.
To configure java applet based authentication proceed as below:
In Policy manager, Setup->Authentication->Authorized User/Group; here create user/group with local [firewall] or any other auth server like [LDAP/AD/RADIUS/etc.].
Now in a new HTTP policy configure as below:
    Enabled and Allowed; from specific-user/group; to public-ip-of-website
Again, all other options like using filter HTTP or having exceptions, all apply to this case as well.

The users would need to go to following address to open java applet for authentication:
https://internal-ip-of-wg:4100 [or would be http based on WG software]

Please let know if you need more details.

Thank you.

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dnscompaniesAuthor Commented:
Awesome dpk_wal, I'm going to try this tomorrow!
dnscompaniesAuthor Commented:
Thank you... sorry for being slow on this. My client has told me to hold off on performing hte actions so I let this question slack a little.  Sorry....
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