how to unblock a URL

Question

Firmware version: 9.506-2 Web Filtering log as follow: 
 2018:01:05-09:34:08 domain httpproxy[5089]: id="0002" severity="info" sys="SecureWeb" sub="http" name="web request blocked" action="block" method="GET" srcip="192.168.x.x" dstip="xxx.xx.xx.xxx" user="" group="" ad_domain="" statuscode="504" cached="0" profile="REF_HttProT12 (Full Allow List)" filteraction="REF_HttCffAllowAllFiter (Allow All Fiter)" size="0" request="0x13b46400" url=" www.xxxxxx.com/main,_mainPage,_archive,_js,_crosspromoblk_v2.js js,_doubleclick_banner,_AppDownload_archivepage.js js,_doubleclick_banner,_SuperBanner_archivepage.js WebResource.axd,qd==ds6pQThO5cFj9xtsC7ga40kw1IR0mWQ2Nv8aQ8VTKo5riFK_BUSGR9yUMyg35LrO5wr3RWBzmTmhM9tcVWClnVycykbWyGNOiALYbuaMqL2oRR7dwhhySpIszH-5KLw12MbyXG_OhOJizEeyWx-rn6zkpIvlxyUz2-D1IcFlHRoZBAMw0,at==633373419560000000 WebResource.axd,qd==f2EZ1YKpAG9fT1624pcECGzC-kfX9LP7EatJbTW5d6Q2-69xmvnG0NcM5t-ZzNREs3oGkbgZ41FPxtm6d3XTUvvcENBOtxO9TD" referer=" www.domain.com/.../programsarchive.aspx" error="Timeout while reading response from Server" authtime="0" dnstime="3" cattime="0" avscantime="0" fullreqtime="60861770" device="0" auth="0" ua="Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.84 Safari/537.36" exceptions="av,sandbox,auth,content,url,ssl,certcheck,certdate,cache,fileextension,size" 
 
 and the browser return : 
 
 While trying to retrieve the URL: 
 www.xxxxxx.com/.../PlayMedia.aspx

The content could not be delivered due to the following condition: 
 Timeout while reading response from Server

Your cache administrator is: 
 domain 
 
 so i add a web protection> Filtering options > exception > new exception 
 Skipping: Authentication / Caching / Block by download size / Antivirus / Extension blocking / MIME type blocking / URL Filter / Content Removal / SSL scanning / Certificate trust check / Certificate date check / Accessed page logging / Blocked page logging / Do not display download/scan progress page Matching these URLs: ^https?://([A-Za-z0-9.-]*\.)?xxxxxx\.com/ 
 
 but this do not fix. anyone help? thanks

BAlfson · Accepted Answer

Billy, when you see statuscode="50?" , it means the server doesn't like the Proxy. If making an Exception for antivirus for the site doesn't fix the problem, you will need to skip the Proxy for that site. 
 Cheers - Bob

Billy Lo · Answer

Finally i found it, 
 add the website in Web Protection > Filtering options > Misc > Transparent Mode Skiplist > Skip Transparent Mode Destination Hosts 
 
 thanks.