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Linkage Technology Limited an authorised reseller of Proxy Plus

Proxy Plus connects your local area network to the internet while protecting your network from hackers.

Additionally Proxy Plus provides content filtering, restrictions based on time of the day, day of the week, computer terminal and logged on user.

Proxy+ is a firewall, proxy, and mail server designed to provide a complete solution of shared access to the Internet from a LAN. Proxy+ features advanced sorting of incoming messages and advanced caching of Web pages. Version 2.20 added an uninstall feature, a full SMTP mail server, proxy cascading by ICP protocol, new documentation, and Socks server support for ICQ. Version 2.50 added enhanced downloading and sorting of mail from POP3 mailboxes, the ability to authenticate a user in a Web browser, and prevention from abusing security bugs in MS Outlook and Outlook Express. This update features minor enhancements and bug fixes.

Click here to download a free version of Proxy Plus

This free download gives a limited disk cache of 1MB and a maximum of two concurrent users and three mailboxes.

Click here to request product pricing based on your requirements.

See below for a full listing of the benefits of Proxy Plus.

• dedicated (synchronous or asynchronous) or switched line connection
• only one IP address, which can be allocated dynamically by the ISP
• automatic dialing at user's or mail server's request
• automatic hang-up after a defined period of inactivity
• week scheduler for an alternate hang-up timeout
• support of ISP's modem multiseries
• manual dial/hang-up via a WWW interface

• separates the LAN from the Internet to protect from attacks
• insecure interfaces (connected to the Internet) are detected automatically
• cache increases speed of data retrieval and enables the use of data even if a connection isn't established
• proxy cascading enables the use of a parent proxy with or without ICP protocol support
• if the ICP protocol is used it is possible to define a few cooperative proxy servers at two levels: parents (at ISP) and siblings (at partnership company)
• ICP protocol effectively detects temporarily dead proxy servers and gives users continuous access to requested objects
• ability to access a listed source server directly (where access is enabled for permitted IP addresses)

• HTTP proxy for access to WWW pages
• HTTPS proxy for access to secured WWW pages
• FTP proxy for access to data at FTP servers directly from a WWW browser
• FTP gateway for access to FTP servers by FTP clients
• Telnet gateway enables terminal access by the Telnet protocol
• RealAudio proxy for playing audio/video distributed in RealAudio protocol
• SOCKS version 4 and 5 for the access of programs using SOCKS protocols
• POP3 mapped link enables easy communication between mail client and mail servers in Internet without using Proxy+ mail server
• DNS forwarder translates domain names to IP addresses
• configurable DNS cache
• Mapped links enable the use of protocols without proxy support (for instance IRC services)

• data stored in the cache from WWW and FTP servers increases the speed of retrieval by other users
• supports HTTP version 1.1
• advanced configuration of cached data validity verification
• explicit time-to-live of cached objects
• disabling of cache storage configurable

• sends and receives mail for many Internet mail boxes at one time using the POP3 protocol
• full SMTP mail server for one or more domains
• option for leaving messages on POP3 server
• possibility to define restrictions for POP3 download (limit of message size, notification of big messages)
• optional APOP authentication on POP3 server (does not send password in readable form)
• messages from an e-mail box can be distributed to user groups
• sorting of incoming messages according to configurable rulesets
• treatment of MS Outlook and Outlook Express bug prevents from attack by means of Date: message header
• users can send messages even if a connection to the Internet isn't established
• intranet mail
• automatic dialing occurs at defined periods, or if the number of outgoing messages exceeds a defined limit
• week dialing scheduler
• enhanced support of the ETRN command makes the full SMTP server applicable even on a switched telephone line
• restriction of clients' relaying to the SMTP server can be configured to prevent the use of the server for spamming
• carbon copy of incoming and outgoing messages to file
• mailer masquerade enables the administrator to set the domain name in mail headers
• configurable resend if any transfer errors occur
• shorter interval between mail exchanges if switched line is connected
• configurable timeouts in communication with Internet mail servers
• configurable maximum length of outgoing messages
• SMTP supports unlimited number of recipients of one message
• it is possible to define list of external email addresses
• it is possible to schedule sending of a message at special time interval (large messages, low priority messages)
• it is possible to view messages ready to send (outgoing queue) and it is possible to delete a waiting message using WWW Admin interface
• plugin support which allows to check messages for viruses and dangerous attachments
• possibility to forward messages downloaded from POP3 servers or received by SMTP server to another local or remote recipients

• a list of enabled LAN segments and/or enabled IP addresses of Proxy+ users
• access restrictions for listed or unlisted URLs
• automatic detection of insecure interfaces
• possibility to authenticate HTTP proxy service by user name and password
• access restrictions by time, content type (pictures, MP3, ....) or service (FTP, RealAudio, ...)
• each computer can use its own restrictions

• user list with grouping ability
• is configured via a WWW interface, access to the interface can be restricted
• support of regular expressions (e.g. in sorting rules, Access List)
• WWW interface for Ping and Traceroute utilities, available also from inside LAN
• display of status information (mail transfers, dialing,..)
• log files about dialing, mail processing, errors, and security violations information
• WWW server for intranet
• customizable error messages
• customizable AccessLog.TXT logfile format
• each parent proxy (parent or sibling) can have username/password assigned
• customizable Content-Type association table

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