Dettagli del server
Squid Transparent Proxy Version: 3.3.8
OS: Ubuntu Server 14.04
Server IP: 192.168.1.3
File di configurazione di calamari
(esclusi i commenti usando grep)
root@ubuntu:~# grep -v '^$\|^\s*\#' /etc/squid3/squid.conf
acl SSL_ports port 443
acl Safe_ports port 80 # http
acl Safe_ports port 21 # ftp
acl Safe_ports port 443 # https
acl Safe_ports port 70 # gopher
acl Safe_ports port 210 # wais
acl Safe_ports port 1025-65535 # unregistered ports
acl Safe_ports port 280 # http-mgmt
acl Safe_ports port 488 # gss-http
acl Safe_ports port 591 # filemaker
acl Safe_ports port 777 # multiling http
acl CONNECT method CONNECT
acl mylocalnetwork src 192.168.1.0/24
http_access deny !Safe_ports
http_access deny CONNECT !SSL_ports
http_access allow localhost manager
http_access allow mylocalnetwork
http_access deny manager
http_access allow localhost
http_access deny all
http_port 3128 transparent
cache_mem 8 MB
maximum_object_size_in_memory 32 KB
memory_replacement_policy heap GDSF
cache_replacement_policy heap LFUDA
cache_dir aufs /opt/squid/cache 10000 14 256
maximum_object_size 128000 KB
cache_swap_low 95
cache_swap_high 99
coredump_dir /var/spool/squid3
refresh_pattern ^ftp: 1440 20% 10080
refresh_pattern ^gopher: 1440 0% 1440
refresh_pattern -i (/cgi-bin/|\?) 0 0% 0
refresh_pattern (Release|Packages(.gz)*)$ 0 20% 2880
refresh_pattern -i \.(gif|png|jp?g|ico|bmp|tiff?)$ 10080 95% 43200
refresh_pattern -i \.(rpm|cab|deb|exe|msi|msu|zip|tar|xz|bz|bz2|lzma|gz|tgz|rar|bin|7z|doc?|xls?|ppt?|pdf|nth|psd|sis)$ 10080 90% 43200
refresh_pattern -i \.(avi|iso|wav|mid|mp?|mpeg|mov|3gp|wm?|swf|flv|x-flv|axd)$ 43200 95% 432000
refresh_pattern -i \.(html|htm|css|js)$ 1440 75% 40320
refresh_pattern -i \.index.(html|htm)$ 0 75% 10080
refresh_pattern -i (/cgi-bin/|\?) 0 0% 0
refresh_pattern . 1440 90% 10080
quick_abort_min 0 KB
quick_abort_max 0 KB
quick_abort_pct 100
store_avg_object_size 13 KB
visible_hostname localhost
Tronchi di calamari
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2014/07/03 22:11:57| ERROR: No forward-proxy ports configured.
2014/07/03 22:11:57| ERROR: No forward-proxy ports configured.
2014/07/03 22:11:57| ERROR: No forward-proxy ports configured.
2014/07/03 22:11:57| ERROR: No forward-proxy ports configured.
2014/07/03 22:11:57| ERROR: No forward-proxy ports configured.
2014/07/03 22:11:57| ERROR: No forward-proxy ports configured.
2014/07/03 22:11:57| ERROR: No forward-proxy ports configured.
2014/07/03 22:11:57| ERROR: No forward-proxy ports configured.
2014/07/03 22:11:57| ERROR: No forward-proxy ports configured.
2014/07/03 22:11:57| ERROR: No forward-proxy ports configured.
2014/07/03 22:11:57| ERROR: No forward-proxy ports configured.
2014/07/03 22:11:57| ERROR: No forward-proxy ports configured.
2014/07/03 22:11:57| Loaded Icons.
2014/07/03 22:11:57| HTCP Disabled.
2014/07/03 22:11:57| Pinger socket opened on FD 13
2014/07/03 22:11:57| Squid plugin modules loaded: 0
2014/07/03 22:11:57| Adaptation support is off.
2014/07/03 22:11:57| Accepting NAT intercepted HTTP Socket connections at local=0.0.0.0:3128 remote=[::] FD 11 flags=41
2014/07/03 22:11:57| Done reading /opt/squid/cache swaplog (2 entries)
2014/07/03 22:11:57| Finished rebuilding storage from disk.
2014/07/03 22:11:57| 2 Entries scanned
2014/07/03 22:11:57| 0 Invalid entries.
2014/07/03 22:11:57| 0 With invalid flags.
2014/07/03 22:11:57| 2 Objects loaded.
2014/07/03 22:11:57| 0 Objects expired.
2014/07/03 22:11:57| 0 Objects cancelled.
2014/07/03 22:11:57| 0 Duplicate URLs purged.
2014/07/03 22:11:57| 0 Swapfile clashes avoided.
2014/07/03 22:11:57| Took 0.08 seconds ( 24.94 objects/sec).
2014/07/03 22:11:57| Beginning Validation Procedure
2014/07/03 22:11:57| Completed Validation Procedure
2014/07/03 22:11:57| Validated 2 Entries
2014/07/03 22:11:57| store_swap_size = 12.00 KB
2014/07/03 22:11:57| ERROR: No forward-proxy ports configured.
2014/07/03 22:11:57| pinger: Initialising ICMP pinger ...
2014/07/03 22:11:57| pinger: ICMP socket opened.
2014/07/03 22:11:57| pinger: ICMPv6 socket opened
2014/07/03 22:11:57| Pinger exiting.
2014/07/03 22:11:58| storeLateRelease: released 0 objects
Regole Iptables
(usando l'interfaccia singola "eth0" per il momento)
iptables -t nat -A PREROUTING -i eth0 -p tcp -m tcp --dport 80 -j DNAT --to-destination 192.168.1.3:3128
iptables -t nat -A PREROUTING -i eth0 -p tcp -m tcp --dport 80 -j REDIRECT --to-ports 3128
iptables -t nat -A POSTROUTING -s 192.168.1.0/24 -o eth0 -j MASQUERADE
Configurazione client
Il problema è che non sono riuscito ad accedere a Internet sui miei computer client con IP di Squid come gateway e DNS primario, come mostrato di seguito.
Su un client Ubuntu
auto eth0
iface eth0 inet static
address 192.168.1.10
netmask 255.255.255.0
gateway 192.168.1.3
dns-nameservers 192.168.1.3
Su un client Windows
Quando cambio DNS su client Ubuntu dns-nameservers 192.168.1.1e client Windows sullo stesso ip del router 192.168.1.1anziché su squid ip (192.168.1.3), allora potrei accedere a Internet su entrambi. Questo potrebbe non essere il modo di fare in quanto la pagina potrebbe essere renderizzata direttamente dal router e potrebbe non provenire dal server di squid usando la cache (ovviamente potrei vedere i log generati in /var/log/squid3/cache.log). Ho anche notato che il mio router lampeggia per le pagine a cui è già stato effettuato l'accesso, ciò può significare che invia la richiesta su Internet invece di recuperare dalla cache di calamari.
Non sono ancora compromesso. Se potessi ancora accedere alle pagine visitate sui miei computer client dalla cache con Internet chiuso, sarei soddisfatto.
Qual è la procedura per configurare i client per Squid Transparent Proxy? Qualcuno mi guida per favore?
Aggiornamento 1
root@ubuntu:~# iptables -t nat -L -n -v
Chain PREROUTING (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
0 0 DNAT tcp -- eth0 * 0.0.0.0/0 0.0.0.0/0 tcp dpt:80 to:192.168.1.3:3128
0 0 REDIRECT tcp -- eth0 * 0.0.0.0/0 0.0.0.0/0 tcp dpt:80 redir ports 3128
Chain INPUT (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
Chain OUTPUT (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
Chain POSTROUTING (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
0 0 MASQUERADE all -- * eth0 192.168.1.0/24 0.0.0.0/0
Aggiornamento 2
Funziona sulla versione precedente Ubuntu 10.04(lucid)con la versione di calamari Squid Cache: Version 2.7.STABLE7, e di seguito il file di configurazione di calamari ha funzionato e ho potuto accedere a Internet sui computer client quando il gateway e il DNS del client sono impostati sull'ip di lucid:
root@lucid:~# grep -v '^$\|^\s*\#' /etc/squid/squid.conf
acl all src all
acl manager proto cache_object
acl localhost src 127.0.0.1/32
acl to_localhost dst 127.0.0.0/8 0.0.0.0/32
acl localnet src 10.0.0.0/8 # RFC1918 possible internal network
acl localnet src 172.16.0.0/12 # RFC1918 possible internal network
acl localnet src 192.168.0.0/16 # RFC1918 possible internal network
acl mynet src 192.168.1.0/24 # RFC1918 possible internal network
acl SSL_ports port 443 # https
acl SSL_ports port 563 # snews
acl SSL_ports port 873 # rsync
acl Safe_ports port 80 # http
acl Safe_ports port 21 # ftp
acl Safe_ports port 443 # https
acl Safe_ports port 70 # gopher
acl Safe_ports port 210 # wais
acl Safe_ports port 1025-65535 # unregistered ports
acl Safe_ports port 280 # http-mgmt
acl Safe_ports port 488 # gss-http
acl Safe_ports port 591 # filemaker
acl Safe_ports port 777 # multiling http
acl Safe_ports port 631 # cups
acl Safe_ports port 873 # rsync
acl Safe_ports port 901 # SWAT
acl purge method PURGE
acl CONNECT method CONNECT
http_access allow manager localhost
http_access deny manager
http_access allow purge localhost
http_access deny purge
http_access deny !Safe_ports
http_access deny CONNECT !SSL_ports
http_access allow localhost
http_access allow mynet
http_access deny all
icp_access allow localnet
icp_access deny all
http_port 3128 transparent
hierarchy_stoplist cgi-bin ?
cache_mem 8 MB
maximum_object_size_in_memory 32 KB
cache_dir ufs /var/spool/squid 2000 16 256
access_log /var/log/squid/access.log squid
refresh_pattern ^ftp: 1440 20% 10080
refresh_pattern ^gopher: 1440 0% 1440
refresh_pattern -i (/cgi-bin/|\?) 0 0% 0
refresh_pattern (Release|Package(.gz)*)$ 0 20% 2880
refresh_pattern . 0 20% 4320
acl shoutcast rep_header X-HTTP09-First-Line ^ICY.[0-9]
upgrade_http0.9 deny shoutcast
acl apache rep_header Server ^Apache
broken_vary_encoding allow apache
extension_methods REPORT MERGE MKACTIVITY CHECKOUT
hosts_file /etc/hosts
offline_mode on
coredump_dir /var/spool/squid
Non sono sicuro del motivo per cui non funziona Ubuntu 14.04con la versione di Squid Squid Cache: Version 3.3.8. Mi mancano sicuramente alcune impostazioni nella nuova versione di calamari o nella nuova distruzione !.
1
Potrei affermare l'ovvio, ma non è il punto centrale di una configurazione proxy trasparente che NON configuri i client?
—
HBruijn,
No, ho appena menzionato le configurazioni del server se potesse meglio eseguire il debug del problema !.
—
user53864
Non capisco come configurare i client squid. Non sono riuscito ad accedere a Internet sul client quando utilizzo ip di 192 (192.168.1.3) di squid come gateway e server DNS primario. Penso che questo sia il modo corretto di configurare i client!
—
user53864
Nessun avviso o messaggio di errore
—
user53864
squid3 -k parse, è tutto pulito.
qual è l'output di questo comando: "iptables -t nat -L -n -v"?
—
TBI Infotech,