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. ( ) (dedicated server, VPS, shared hosting), - WHMCS, Ensim, parallels . - OS , VMWARE, SUN XVM, KVM(kernal virtual machine) .
firewall server .
Squid transparent proxy server PHP+mysql.

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squid - IP LDAP( ) squid , . ( openLDAP squid)
users IP. php cron 2 mysql - IP LDAP. (squid header ). .

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