Hello everyone, We have this situation and we tried a lot of configurations without success. ? 1000 Customers ? 4 Caches BOX running Squid 2.7 on Debian Squeeze ? Caches are full-meshed to each other ? Every Squid is running in transparent mode (http_port 3128 transparent) ? Every Squid is running HAARPCACHE on localhost at port 8080 (HAARPCACHE is a Thundercache 3.1 fork wich Works PERFECT for caching sites like youtube with lots of HITS) . ? Every Squid is connected to Internet through RB1 ? RB2 (Mikrotik RouterOS) is doing round-robin selection on every squid redirecting all trafic to port 80 to internet to port 3128 on squid cat /etc/haarp/haarp.lst root@cpe-58-1-26-172:/etc/haarp# cat /etc/haarp/haarp.lst http.*\.4shared\.com.*(\.exe|\.iso|\.torrent|\.zip|\.rar|\.pdf|\.doc|\.tar|\ .mp3|\.mp4|\.avi|\.wmv) http.*\.avast\.com.*(\.def|\.vpu|\.vpaa|\.stamp) http.*(\.avg\.com|\.grisoft\.com|\.grisoft\.cz).*(\.bin|\.exe) http.*(\.avgate\.com|\.avgate\.net|\.freeav\.net|\.freeav\.com).*(\.gz) http.*\.bitgravity\.com.*(\.flv\.mp4) http.*\.etrustdownloads\.ca\.com.*(\.tar|\.zip|\.exe|\.pkg) http.*flashvideo\.globo\.com.*(\.mp4|\.flv) http.{1,4}vsh\.r7\.com\/.*(\.mp4)$ 74\.125\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[ 0-9][0-9]?) #http.*\.googlevideo\.com.*videoplayback #http.*fpatch\.grandchase\.com\.br.*(\.kom|\.mkom|\.mp3) http.*(\.kaspersky-labs\.com|\.geo\.kaspersky\.com|kasperskyusa\.com).*(\.av c|\.kdc|\.klz|\.bz2|\.dat|\.dif) #http.*\.mccont\.com.*\.flv http.*\.metacafe\.com.*\.flv http.{1,4}media\w*\.justin.tv\/archives\/(\w|\/|-)*\.flv(\?.*|$) http.{1,4}\w*juegos\w*\.juegosdiarios\.com\/(\w|\/|-)*\.swf$ http.{1,4}\w*\.juegosjuegos\.com\/games(\w|\/|-)*\.swf$ ##http.*(\.windowsupdate\.com|(\.microsoft\.com)).*(\.cab|\.exe|\.iso|\.zip| \.psf) http.*(\.windowsupdate\.com|(update|download|dlservice|windowsupdate)\.micro soft\.com)\/.*(\.cab|\.exe|\.iso|\.zip|\.psf|\.txt|\.crt)$ http.*\.pornotube\.com.*\.flv http.*\.terra\.com.*\.flv #http.*uol\.com\.br.*\.flv http.*\.viddler\.com.*\.flv #http.*\.video\.msn\.com.*\.flv http.*(porn|img).*\.xvideos\.com\/videos\/(thumbs\/)?.*(\.jpg|\.flv\?.*|\.mp 4\?.*)$ http.*\.youtube\.com.*videoplayback\? http.*\.ziddu\.com.*(\.exe|\.iso|\.torrent|\.zip|\.rar|\.pdf|\.doc|\.tar|\.m p3|\.mp4|\.avi|\.wmv) http.*edgecastcdn\.net/.*(\.mp4|\.flv) http.*adobe\.com/.*(\.cab|\.aup|\.exe|\.msi|\.upd|\.msp) http.*\.eset\.com.*\.nup http.*\.nai\.com.*(\.zip|\.tar|\.exe|\.gem) http.*\.pop6\.com.*(\.flv) http.*\.symantecliveupdate\.com.*(\.zip|\.exe) #http.*\.xpg\.com\.br.* http.{1,4}\w*\.ytimg\.com.*(hqdefault(\.jpg|\.mp4)$|M[0-9]+\.jpg\?sigh=) http.{1,4}\w*google(\.\w|\w)*\.doubleclick\.net\/pagead\/ads\?.* http.*img[0-9]\.submanga\.com\/(hd)?pages\/.*(\.jpg|\.webp) http.*(profile|s?photos|video).{0,5}\.ak\.fbcdn\.net\/.*(\.mp4\?.*|\_[a-z]\. jpg$|\.mp4$|\_[a-z]\.png$) #http.*(profile|s?photos|video).{0,5}\.ak\.fbcdn\.net\/.*(\.mp4\?.*|\_n\.jpg $|\.mp4$|\_n\.png$) http.*\.video\.pornhub\.\w*\.com\/videos\/.*\.flv\?.* http.*\.(publicvideo|publicphoto)\.xtube\.com\/(videowall\/)?videos?\/.*(\.f lv\?.*|\_Thumb\.flv$) http.*public\.tube8\.com\/.*\.mp4.* http.*videos\..*\.redtubefiles\.com\/.*\.flv (205\.196\.|199\.91\.)[0-9]{2,3}\.[0-9]{1,3}\/.* #http.*\.rapidshare\.com\/cgi-bin\/.*\.cgi\?.*sub=download http.*\.vimeo.com\/.*\.mp4(\?.*)?$ http.*images\.orkut\.com\/orkut\/photos\/.*\.jpg$ http.{1,4}(\w|\/|\.|-)*media\.tumblr\.com\/(\w|\/|-|\.)*tumblr(\w|\/|-)*(\.p ng|\.jpg)$ #http.{1,7}speedtest(\w|-)*(\.|\w)+\/speedtest\/(random.*\.jpg|latency\.txt) \?.* #http.{1,10}testdevelocidad.{1,5}\/speedtest\/(random.*\.jpg|latency\.txt)\? .* #http.{1,7}(\.|[a-z]|[0-9]|-)+(\/\w+)?(\/speedtest)+\/(random[0-9]+x[0-9]+\. jpg|latency\.txt) As you can well see!, youtube and many others sites is cachings its content through HAARPCACHE and not by squid itself. BTW It Works GREAT. Configuration on every squid.conf at /etc/squid Proxy1: IP: 192.168.1.1 cache_peer 192.168.2.1 sibling 3128 3130 proxy-only cache_peer 192.168.3.1 sibling 3128 3130 proxy-only cache_peer 192.168.4.1 sibling 3128 3130 proxy-only acl haarp_lst url_regex -i "/etc/haarp/haarp.lst" cache deny haarp_lst cache_peer 127.0.0.1 parent 8080 0 proxy-only no-digest dead_peer_timeout 2 seconds cache_peer_access 127.0.0.1 allow haarp_lst cache_peer_access 127.0.0.1 deny all Proxy2: IP: 192.168.2.1 cache_peer 192.168.1.1 sibling 3128 3130 proxy-only cache_peer 192.168.3.1 sibling 3128 3130 proxy-only cache_peer 192.168.4.1 sibling 3128 3130 proxy-only acl haarp_lst url_regex -i "/etc/haarp/haarp.lst" cache deny haarp_lst cache_peer 127.0.0.1 parent 8080 0 proxy-only no-digest dead_peer_timeout 2 seconds cache_peer_access 127.0.0.1 allow haarp_lst cache_peer_access 127.0.0.1 deny all Proxy3: IP: 192.168.3.1 cache_peer 192.168.2.1 sibling 3128 3130 proxy-only cache_peer 192.168.1.1 sibling 3128 3130 proxy-only cache_peer 192.168.4.1 sibling 3128 3130 proxy-only acl haarp_lst url_regex -i "/etc/haarp/haarp.lst" cache deny haarp_lst cache_peer 127.0.0.1 parent 8080 0 proxy-only no-digest dead_peer_timeout 2 seconds cache_peer_access 127.0.0.1 allow haarp_lst cache_peer_access 127.0.0.1 deny all Proxy4: IP: 192.168.4.1 cache_peer 192.168.2.1 sibling 3128 3130 proxy-only cache_peer 192.168.3.1 sibling 3128 3130 proxy-only cache_peer 192.168.1.1 sibling 3128 3130 proxy-only acl haarp_lst url_regex -i "/etc/haarp/haarp.lst" cache deny haarp_lst cache_peer 127.0.0.1 parent 8080 0 proxy-only no-digest dead_peer_timeout 2 seconds cache_peer_access 127.0.0.1 allow haarp_lst cache_peer_access 127.0.0.1 deny all Everything ?Works? fine when you browse sites but those who MUST go through HAARPCACHE PEER don?t. Let?s picture that. Client 1 ask for http://www.youtube.com/watch?v=juqyzgnbspY . RB2, through its round-robin selection, redirect this petition to Proxy1 Proxy1 accept this connection and according to ?acl haarp_lst?, it goes to cache_peer 127.0.0.1. Proxy1 -> Peer 127.0.0.1: ? Is http://www.youtube.com/watch?v=juqyzgnbspY on local cache?. o If YES: RETURN HIT with the FILE o If NO: RETURN MISS, download the file from Internet, save it to disk and serve the file. Client 80 ask for http://www.youtube.com/watch?v=juqyzgnbspY . RB2, through its round-robin selection, redirect this petition to Proxy3 Proxy3 accept this connection and according to ?acl haarp_lst?, it goes to cache_peer 127.0.0.1. Proxy3 -> Peer 127.0.0.1: ? Is http://www.youtube.com/watch?v=juqyzgnbspY on local cache?. o If YES: RETURN HIT with the FILE o If NO: RETURN MISS, download the file from Internet, save it to disk and serve the file. As you can see, the same file is downloaded twice (at least) if the petition is not redirected to the same cache box. How can I achieve the goal to ask every cache and if the file is cached on any sibling or parent it shouldn?t be downloaded from internet but the cache itself. Note 1: I can run HAARPCACHE on 0.0.0.0/0 if this is a solution. The schematic bellow shows how are connected clients, caches and routers. http://picpaste.com/njTPeEBb.jpg Please forgive my errors writing in english.