hi I have fedora 12 that upgraded it's kernel to 2.6.37 , and iptables 1.4.19 , i installed squid 3.2.2 in tproxy mod on it use steps from this link http://wiki.squid-cache.org/Features/Tproxy4#Feature:_TPROXY_version_4.1.2B-_Support everything seems ok but when I run squid and insert url in browser get this message ERROR The requested URL could not be retrieved The following error was encountered while trying to retrieve the URL: http://google.com/ Access Denied. Access control configuration prevents your request from being allowed at this time. Please contact your service provider if you feel this is incorrect. Your cache administrator is webmaster. Generated Tue, 25 Jun 2013 12:34:53 GMT by localhost.localdomain (squid/3.3.2) and in terminal this message : 2013/06/26 14:55:35| WARNING: Forwarding loop detected for: POST /safebrowsing/downloads?client=navclient-auto-ffox&appver=3.5.4&pver=2.2&wrkey=AKEgNivruGNaM449DFDdRiYv81wyGtp5gMSMU4fMMS_g2YKGXmFhYZxbsymSyj14q22Xr7_cCx0nRwFKaCNyKKvMEev0WhcpRg== HTTP/1.1 Host: safebrowsing.clients.google.com User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.4) Gecko/20091027 Fedora/3.5.4-1.fc12 Firefox/3.5.4 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: en-us,en;q=0.5 Accept-Encoding: gzip,deflate Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7 Content-Length: 110 Content-Type: text/plain Cookie: PREF=ID=1b085458083db40f:U=8d54b4985abb086f:FF=0:TM=1371881983:LM=1371882262:S=gjQlM4Sqrueu3KHq; NID=67=YXYmGeg68fPjuU2-QOne46eStjqotGcE0AZTiWmbRXT2klqJYDLayVduleh1HnEFN-CyfZSTsgJABBKwm3dAP3Cvxi8_yZRnIE5zQSYScyHMc03Tz-37Mu8vur3WU4yH Via: 1.1 localhost.localdomain (squid/3.3.2) X-Forwarded-For: 10.1.110.83 Cache-Control: max-age=0 Connection: keep-alive 2013/06/26 15:00:56| WARNING: Forwarding loop detected for: GET / HTTP/1.1 Host: google.com User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.4) Gecko/20091027 Fedora/3.5.4-1.fc12 Firefox/3.5.4 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: en-us,en;q=0.5 Accept-Encoding: gzip,deflate Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7 Cookie: PREF=ID=1b085458083db40f:U=8d54b4985abb086f:FF=0:TM=1371881983:LM=1371882262:S=gjQlM4Sqrueu3KHq; NID=67=YXYmGeg68fPjuU2-QOne46eStjqotGcE0AZTiWmbRXT2klqJYDLayVduleh1HnEFN-CyfZSTsgJABBKwm3dAP3Cvxi8_yZRnIE5zQSYScyHMc03Tz-37Mu8vur3WU4yH Via: 1.1 localhost.localdomain (squid/3.3.2) X-Forwarded-For: 10.1.110.83 Cache-Control: max-age=259200 Connection: keep-alive 2013/06/26 15:00:57| WARNING: Forwarding loop detected for: GET /Artwork/SN.png HTTP/1.1 Host: http://www.squid-cache.org/ User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.4) Gecko/20091027 Fedora/3.5.4-1.fc12 Firefox/3.5.4 Accept: image/png,image/*;q=0.8,*/*;q=0.5 Accept-Language: en-us,en;q=0.5 Accept-Encoding: gzip,deflate Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7 Referer: http://google.com/ Via: 1.1 localhost.localdomain (squid/3.3.2) X-Forwarded-For: 10.1.110.83 Cache-Control: max-age=259200 Connection: keep-alive also this in my squid access log 1372164328.471 0 10.1.110.83 TCP_MISS/403 4642 POST http://safebrowsing.clients.google.com/safebrowsing/downloads? - HIER_NONE/- text/html 1372164328.471 3 10.1.110.83 TCP_MISS/403 4725 POST http://safebrowsing.clients.google.com/safebrowsing/downloads? - HIER_DIRECT/10.1.110.83 text/html 1372164388.473 0 10.1.110.83 TCP_MISS/403 4642 POST http://safebrowsing.clients.google.com/safebrowsing/downloads? - HIER_NONE/- text/html 1372164388.475 2 10.1.110.83 TCP_MISS/403 4725 POST http://safebrowsing.clients.google.com/safebrowsing/downloads? - HIER_DIRECT/10.1.110.83 text/html 1372242335.540 8 10.1.110.83 TCP_MISS/403 4642 POST http://safebrowsing.clients.google.com/safebrowsing/downloads? - HIER_NONE/- text/html 1372242335.559 42 10.1.110.83 TCP_MISS/403 4725 POST http://safebrowsing.clients.google.com/safebrowsing/downloads? - HIER_DIRECT/10.1.110.83 text/html 1372242656.549 0 10.1.110.83 TCP_MISS/403 4272 GET http://google.com/ - HIER_NONE/- text/html 1372242656.549 4 10.1.110.83 TCP_MISS/403 4355 GET http://google.com/ - HIER_DIRECT/10.1.110.83 text/html 1372242657.031 0 10.1.110.83 TCP_MISS/403 4074 GET http://www.squid-cache.org/Artwork/SN.png - HIER_NONE/- text/html 1372242657.031 345 10.1.110.83 TCP_MISS/403 4157 GET http://www.squid-cache.org/Artwork/SN.png - HIER_DIRECT/10.1.110.83 text/html what is the problem?