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add tor sub projects as modules
2015-11-06 00:43:21 +01:00
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<div id="siteNotice"><script type='text/javascript'>if (wgNotice != '') document.writeln(wgNotice);</script></div> <h1 id="firstHeading" class="firstHeading">SOCKS</h1>
<div id="bodyContent">
<h3 id="siteSub">From Wikipedia, the free encyclopedia</h3>
<div id="contentSub"></div>
<div id="jump-to-nav">Jump to: <a href="#column-one">navigation</a>, <a href="#searchInput">search</a></div> <!-- start content -->
<div class="dablink">This article is about an internet protocol. For other uses, see <a href="/wiki/Socks_(disambiguation)" title="Socks (disambiguation)">Socks (disambiguation)</a>.</div>
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<td class="mbox-text" style="">This article <b>may be too technical for most readers to understand</b>. Please <a href="http://en.wikipedia.org/w/index.php?title=SOCKS&amp;action=edit" class="external text" title="http://en.wikipedia.org/w/index.php?title=SOCKS&amp;action=edit" rel="nofollow">expand</a> it to <a href="/wiki/Wikipedia:Make_technical_articles_accessible" title="Wikipedia:Make technical articles accessible">make it accessible to non-experts</a>, without removing the technical details.</td>
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<p><b>SOCKS</b> is an <a href="/wiki/Internet" title="Internet">Internet</a> <a href="/wiki/Protocol_(computing)" title="Protocol (computing)">protocol</a> that facilitates the routing of <a href="/wiki/Packet_(information_technology)" title="Packet (information technology)">network packets</a> between <a href="/wiki/Client-server" title="Client-server">client-server</a> applications via a <a href="/wiki/Proxy_server" title="Proxy server">proxy server</a>. SOCKS performs at Layer 5 of the <a href="/wiki/OSI_model" title="OSI model">OSI model</a>—the <a href="/wiki/Session_layer" title="Session layer" class="mw-redirect">Session Layer</a> (an intermediate layer between the <a href="/wiki/Presentation_layer" title="Presentation layer" class="mw-redirect">presentation layer</a> and the <a href="/wiki/Transport_layer" title="Transport layer" class="mw-redirect">transport layer</a>).</p>
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<h2>Contents</h2>
</div>
<ul>
<li class="toclevel-1"><a href="#History"><span class="tocnumber">1</span> <span class="toctext">History</span></a></li>
<li class="toclevel-1"><a href="#Comparison_between_SOCKS_and_HTTP_proxies"><span class="tocnumber">2</span> <span class="toctext">Comparison between SOCKS and HTTP proxies</span></a>
<ul>
<li class="toclevel-2"><a href="#SOCKS"><span class="tocnumber">2.1</span> <span class="toctext">SOCKS</span></a></li>
<li class="toclevel-2"><a href="#HTTP"><span class="tocnumber">2.2</span> <span class="toctext">HTTP</span></a></li>
</ul>
</li>
<li class="toclevel-1"><a href="#SOCKS_4_protocol"><span class="tocnumber">3</span> <span class="toctext">SOCKS 4 protocol</span></a>
<ul>
<li class="toclevel-2"><a href="#SOCKS_4a_protocol"><span class="tocnumber">3.1</span> <span class="toctext">SOCKS 4a protocol</span></a></li>
</ul>
</li>
<li class="toclevel-1"><a href="#SOCKS_5_protocol"><span class="tocnumber">4</span> <span class="toctext">SOCKS 5 protocol</span></a></li>
<li class="toclevel-1"><a href="#Related_software"><span class="tocnumber">5</span> <span class="toctext">Related software</span></a></li>
<li class="toclevel-1"><a href="#References"><span class="tocnumber">6</span> <span class="toctext">References</span></a></li>
<li class="toclevel-1"><a href="#External_links"><span class="tocnumber">7</span> <span class="toctext">External links</span></a></li>
</ul>
</td>
</tr>
</table>
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<p><a name="History" id="History"></a></p>
<h2><span class="editsection">[<a href="/w/index.php?title=SOCKS&amp;action=edit&amp;section=1" title="Edit section: History">edit</a>]</span> <span class="mw-headline">History</span></h2>
<p>The protocol was originally developed by David Koblas, a system administrator of <a href="/wiki/MIPS_Computer_Systems" title="MIPS Computer Systems" class="mw-redirect">MIPS Computer Systems</a>. After MIPS was taken over by <a href="/wiki/Silicon_Graphics" title="Silicon Graphics">Silicon Graphics</a> in 1992, Koblas presented a paper on SOCKS at that year's Usenix Security Symposium and SOCKS became publicly available.<sup id="cite_ref-0" class="reference"><a href="#cite_note-0"><span>[</span>1<span>]</span></a></sup> The protocol was extended to version 4 by Ying-Da Lee of <a href="/wiki/NEC" title="NEC">NEC</a>.</p>
<p>The SOCKS reference architecture and client are owned by <a href="/w/index.php?title=Permeo_Technologies&amp;action=edit&amp;redlink=1" class="new" title="Permeo Technologies (page does not exist)">Permeo Technologies</a><sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span>[</span>2<span>]</span></a></sup> a spin-off from <a href="/wiki/NEC" title="NEC">NEC</a>. (Note that Permeo Technologies has been bought out by <a href="/wiki/Blue_Coat_Systems" title="Blue Coat Systems">Blue Coat Systems</a>.<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span>[</span>3<span>]</span></a></sup><sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span>[</span>4<span>]</span></a></sup>)</p>
<p><a name="Comparison_between_SOCKS_and_HTTP_proxies" id="Comparison_between_SOCKS_and_HTTP_proxies"></a></p>
<h2><span class="editsection">[<a href="/w/index.php?title=SOCKS&amp;action=edit&amp;section=2" title="Edit section: Comparison between SOCKS and HTTP proxies">edit</a>]</span> <span class="mw-headline">Comparison between SOCKS and HTTP proxies</span></h2>
<p>SOCKS uses a handshake protocol to inform the proxy software about the connection that the client is trying to make and may be used for any form of <a href="/wiki/Transmission_Control_Protocol" title="Transmission Control Protocol">TCP</a> or <a href="/wiki/User_Datagram_Protocol" title="User Datagram Protocol">UDP</a> socket connection, whereas a <a href="/wiki/HTTP" title="HTTP" class="mw-redirect">HTTP</a> proxy analyses the <a href="/wiki/List_of_HTTP_headers" title="List of HTTP headers">HTTP headers</a> sent through it in order to deduce the address of the server and therefore may only be used for HTTP traffic. The following examples demonstrate the difference between the SOCKS and HTTP proxy protocols:</p>
<p><a name="SOCKS" id="SOCKS"></a></p>
<h3><span class="editsection">[<a href="/w/index.php?title=SOCKS&amp;action=edit&amp;section=3" title="Edit section: SOCKS">edit</a>]</span> <span class="mw-headline">SOCKS</span></h3>
<p>Bill wishes to communicate with Jane over the internet, but a firewall exists on his network between them and Bill is not authorised to communicate through it himself. Therefore, he connects to the SOCKS proxy on his network and sends information about the connection he wishes to make to Jane. The SOCKS proxy opens a connection through the firewall and facilitates the communication between Bill and Jane. For more information on the technical specifics of the SOCKS protocol, see the sections below.</p>
<p><a name="HTTP" id="HTTP"></a></p>
<h3><span class="editsection">[<a href="/w/index.php?title=SOCKS&amp;action=edit&amp;section=4" title="Edit section: HTTP">edit</a>]</span> <span class="mw-headline">HTTP</span></h3>
<p>Bill wishes to download a web page from Jane, who runs a web server. Bill cannot directly connect to Jane's server, as a firewall has been put in place on his network. In order to communicate with the server, Bill connects to his network's HTTP proxy. His internet browser communicates with the proxy in exactly the same way it would the target server—it sends a standard HTTP request header. The HTTP proxy reads the request and looks for the Host header. It then connects to the server specified in the header and transmits any data the server replies with back to Bill.</p>
<p><a name="SOCKS_4_protocol" id="SOCKS_4_protocol"></a></p>
<h2><span class="editsection">[<a href="/w/index.php?title=SOCKS&amp;action=edit&amp;section=5" title="Edit section: SOCKS 4 protocol">edit</a>]</span> <span class="mw-headline">SOCKS 4 protocol</span></h2>
<p>A typical SOCKS 4 connection request looks like this (one byte each):</p>
<p>Client to SOCKS Server:</p>
<ul>
<li>field 1: SOCKS version number, 1 byte, must be 0x04 for this version</li>
<li>field 2: command code, 1 byte:
<ul>
<li>0x01 = establish a TCP/IP stream connection</li>
<li>0x02 = establish a TCP/IP port binding</li>
</ul>
</li>
<li>field 3: network byte order port number, 2 bytes</li>
<li>field 4: network byte order IP address, 4 bytes</li>
<li>field 5: the user ID string, variable length, terminated with a null (0x00)</li>
</ul>
<p>Server to SOCKS client:</p>
<ul>
<li>field 1: null byte</li>
<li>field 2: status, 1 byte:
<ul>
<li>0x5a = request granted</li>
<li>0x5b = request rejected or failed</li>
<li>0x5c = request failed because client is not running <a href="/wiki/Identd" title="Identd" class="mw-redirect">identd</a> (or not reachable from the server)</li>
<li>0x5d = request failed because client's identd could not confirm the user ID string in the request</li>
</ul>
</li>
<li>field 3: 2 arbitrary bytes, that should be ignored</li>
<li>field 4: 4 arbitrary bytes, that should be ignored</li>
</ul>
<p>This is a SOCKS 4 request to connect Fred to 66.102.7.99:80, the server replies with an "OK".</p>
<ul>
<li>Client: 0x04 | 0x01 | 0x00 0x50 | 0x42 0x66 0x07 0x63 | 0x46 0x72 0x65 0x64 0x00
<ul>
<li>The last field is 'Fred' in <a href="/wiki/ASCII" title="ASCII">ASCII</a>, followed by a null byte.</li>
</ul>
</li>
<li>Server: 0x00 | 0x5a | 0xXX 0xXX | 0xXX 0xXX 0xXX 0xXX
<ul>
<li>0xXX can be any byte value. The Socks 4 protocol specifies the values of these bytes should be ignored.</li>
</ul>
</li>
</ul>
<p>From this point on any data sent from the SOCKS client to the SOCKS server will be relayed to 66.102.7.99 and vice versa.</p>
<p>The command field can be 0x01 for "connect" or 0x02 for "bind". "bind" allows incoming connections for protocols like active <a href="/wiki/File_Transfer_Protocol" title="File Transfer Protocol">FTP</a>.</p>
<p><a name="SOCKS_4a_protocol" id="SOCKS_4a_protocol"></a></p>
<h3><span class="editsection">[<a href="/w/index.php?title=SOCKS&amp;action=edit&amp;section=6" title="Edit section: SOCKS 4a protocol">edit</a>]</span> <span class="mw-headline">SOCKS 4a protocol</span></h3>
<p><b>SOCKS 4a</b> is a simple extension to SOCKS 4 protocol that allows a client that cannot resolve the destination host's domain name to specify it.</p>
<p>The client should set the first three bytes of DSTIP to NULL and the last byte to a non-zero value. (This corresponds to IP address 0.0.0.x, with x nonzero, an inadmissible destination address and thus should never occur if the client can resolve the domain name.) Following the NULL byte terminating USERID, the client must send the destination domain name and terminate it with another NULL byte. This is used for both "connect" and "bind" requests.</p>
<p>Client to SOCKS server:</p>
<ul>
<li>field 1: SOCKS version number, 1 byte, must be 0x04 for this version</li>
<li>field 2: command code, 1 byte:
<ul>
<li>0x01 = establish a TCP/IP stream connection</li>
<li>0x02 = establish a TCP/IP port binding</li>
</ul>
</li>
<li>field 3: network byte order port number, 2 bytes</li>
<li>field 4: deliberate invalid IP address, 4 bytes, first three must be 0x00 and the last one must not be 0x00</li>
<li>field 5: the user ID string, variable length, terminated with a null (0x00)</li>
<li>field 6: the domain name of the host we want to contact, variable length, terminated with a null (0x00)</li>
</ul>
<p>Server to SOCKS client:</p>
<ul>
<li>field 1: null byte</li>
<li>field 2: status, 1 byte:
<ul>
<li>0x5a = request granted</li>
<li>0x5b = request rejected or failed</li>
<li>0x5c = request failed because client is not running identd (or not reachable from the server)</li>
<li>0x5d = request failed because client's identd could not confirm the user ID string in the request</li>
</ul>
</li>
<li>field 3: network byte order port number, 2 bytes</li>
<li>field 4: network byte order IP address, 4 bytes</li>
</ul>
<p>A server using protocol 4A must check the DSTIP in the request <a href="/wiki/Packet_(information_technology)" title="Packet (information technology)">packet</a>. If it represents address 0.0.0.x with nonzero x, the server must read in the domain name that the client sends in the packet. The server should resolve the <a href="/wiki/Domain_name" title="Domain name">domain name</a> and make connection to the destination host if it can.</p>
<p><a name="SOCKS_5_protocol" id="SOCKS_5_protocol"></a></p>
<h2><span class="editsection">[<a href="/w/index.php?title=SOCKS&amp;action=edit&amp;section=7" title="Edit section: SOCKS 5 protocol">edit</a>]</span> <span class="mw-headline">SOCKS 5 protocol</span></h2>
<p>The SOCKS 5 protocol is an extension of the SOCKS 4 protocol that is defined in <a href="http://www.rfc-editor.org/rfc/rfc1928.txt" class="external text" title="http://www.rfc-editor.org/rfc/rfc1928.txt" rel="nofollow">RFC 1928</a>. It offers more choices of authentication, adds support for <a href="/wiki/IPv6" title="IPv6">IPv6</a> and <a href="/wiki/User_Datagram_Protocol" title="User Datagram Protocol">UDP</a> that can be used for <a href="/wiki/DNS_lookup" title="DNS lookup" class="mw-redirect">DNS lookups</a>. The initial handshake now consists of the following:</p>
<ul>
<li>Client connects and sends a greeting which includes a list of authentication methods supported.</li>
<li>Server chooses one (or sends a failure response if none of the offered methods are acceptable).</li>
<li>Several messages may now pass between the client and the server depending on the authentication method chosen.</li>
<li>Client sends a connection request similar to SOCKS 4.</li>
<li>Server responds similar to SOCKS 4.</li>
</ul>
<p>The authentication methods supported are numbered as follows:</p>
<ul>
<li>0x00: No authentication</li>
<li>0x01: <a href="/wiki/GSSAPI" title="GSSAPI" class="mw-redirect">GSSAPI</a> <sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span>[</span>5<span>]</span></a></sup></li>
<li>0x02: Username/Password <sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span>[</span>6<span>]</span></a></sup></li>
<li>0x03-0x7F: methods assigned by <a href="/wiki/Internet_Assigned_Numbers_Authority" title="Internet Assigned Numbers Authority">IANA</a> <sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span>[</span>7<span>]</span></a></sup></li>
<li>0x80-0xFE: methods reserved for private use</li>
</ul>
<p>The initial greeting from the client is</p>
<ul>
<li>field 1: SOCKS version number (must be 0x05 for this version)</li>
<li>field 2: number of authentication methods supported, 1 byte</li>
<li>field 3: authentication methods, variable length, 1 byte per method supported</li>
</ul>
<p>The server's choice is communicated:</p>
<ul>
<li>field 1: SOCKS version, 1 byte (0x05 for this version)</li>
<li>field 2: chosen authentication method, 1 byte, or 0xFF if no acceptable methods were offered</li>
</ul>
<p>The subsequent authentication is method-dependent and described in <a href="http://tools.ietf.org/html/rfc1929" class="external text" title="http://tools.ietf.org/html/rfc1929" rel="nofollow">RFC 1929</a>:</p>
<p>The client's authentication request is</p>
<ul>
<li>field 1: version number, 1 byte (must be 0x01)</li>
<li>field 2: username length, 1 byte</li>
<li>field 3: username</li>
<li>field 4: password length, 1 byte</li>
<li>field 5: password</li>
</ul>
<p>Server response for authentication:</p>
<ul>
<li>field 1: version, 1 byte</li>
<li>field 2: status code, 1 byte.
<ul>
<li>0x00 = success</li>
<li>any other value = failure, connection must be closed</li>
</ul>
</li>
</ul>
<p>The client's connection request is</p>
<ul>
<li>field 1: SOCKS version number, 1 byte (must be 0x05 for this version)</li>
<li>field 2: command code, 1 byte:
<ul>
<li>0x01 = establish a TCP/IP stream connection</li>
<li>0x02 = establish a TCP/IP port binding</li>
<li>0x03 = associate a UDP port</li>
</ul>
</li>
<li>field 3: reserved, must be 0x00</li>
<li>field 4: address type, 1 byte:
<ul>
<li>0x01 = IPv4 address</li>
<li>0x03 = Domain name</li>
<li>0x04 = IPv6 address</li>
</ul>
</li>
<li>field 5: destination address of
<ul>
<li>4 bytes for IPv4 address</li>
<li>1 byte of name length followed by the name for Domain name</li>
<li>16 bytes for IPv6 address</li>
</ul>
</li>
<li>field 6: port number in a <a href="/wiki/Network_byte_order" title="Network byte order" class="mw-redirect">network byte order</a>, 2 bytes</li>
</ul>
<p>Server response:</p>
<ul>
<li>field 1: SOCKS protocol version, 1 byte (0x05 for this version)</li>
<li>field 2: status, 1 byte:
<ul>
<li>0x00 = request granted</li>
<li>0x01 = general failure</li>
<li>0x02 = connection not allowed by ruleset</li>
<li>0x03 = network unreachable</li>
<li>0x04 = host unreachable</li>
<li>0x05 = connection refused by destination host</li>
<li>0x06 = <a href="/wiki/Time_to_live" title="Time to live">TTL</a> expired</li>
<li>0x07 = command not supported / protocol error</li>
<li>0x08 = address type not supported</li>
</ul>
</li>
<li>field 3: reserved, must be 0x00</li>
<li>field 4: address type, 1 byte:
<ul>
<li>0x01 = IPv4 address</li>
<li>0x03 = Domain name</li>
<li>0x04 = IPv6 address</li>
</ul>
</li>
<li>field 5: destination address of
<ul>
<li>4 bytes for IPv4 address</li>
<li>1 byte of name length followed by the name for Domain name</li>
<li>16 bytes for IPv6 address</li>
</ul>
</li>
<li>field 6: network byte order port number, 2 bytes</li>
</ul>
<p>There are client programs that "socksify",<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span>[</span>8<span>]</span></a></sup> which allows adaptation of any networked software to connect to external networks via SOCKS.</p>
<p><a name="Related_software" id="Related_software"></a></p>
<h2><span class="editsection">[<a href="/w/index.php?title=SOCKS&amp;action=edit&amp;section=8" title="Edit section: Related software">edit</a>]</span> <span class="mw-headline">Related software</span></h2>
<ul>
<li><a href="http://ksb.sourceforge.net" class="external text" title="http://ksb.sourceforge.net" rel="nofollow">Kernel SOCKS Bouncer</a> ksb26 (Kernel Socks Bouncer) is a Linux Kernel 2.6.x Loadable Kernel Module that redirects TCP connection (to user-defined target hosts) through socks 4/5 chains.</li>
<li><a href="http://ss5.sourceforge.net/" class="external text" title="http://ss5.sourceforge.net/" rel="nofollow">SS5 Socks Server</a> is an open-source SOCKS4/SOCKS5 server.</li>
<li><a href="http://www.inet.no/dante/" class="external text" title="http://www.inet.no/dante/" rel="nofollow">Dante</a> is an open-source SOCKS4/SOCKS5 implementation with commercial support developed by <a href="http://www.inet.no/english/index.html" class="external text" title="http://www.inet.no/english/index.html" rel="nofollow">Inferno Nettverk A/S</a>.</li>
<li><a href="/wiki/OpenSSH" title="OpenSSH">OpenSSH</a> allows dynamic creation of tunnels, specified via a subset of the SOCKS protocol, supporting the CONNECT command.</li>
<li><a href="/wiki/PuTTY" title="PuTTY">PuTTY</a> is a Win32 SSH client that supports local creation of SOCKS (dynamic) tunnels through remote SSH servers.</li>
<li><a href="/w/index.php?title=WinSocks&amp;action=edit&amp;redlink=1" class="new" title="WinSocks (page does not exist)">WinSocks</a> is a light-weight SOCKS4/SOCKS5 server developed by <a href="http://www.proxylabs.com/" class="external text" title="http://www.proxylabs.com/" rel="nofollow">Proxy Labs</a>.</li>
<li><a href="http://www.dest-unreach.org/socat/" class="external text" title="http://www.dest-unreach.org/socat/" rel="nofollow">SOcat (SOcket CAT)</a> is a multipurpose relay program&#160;: includes socks4, and socks4a functionality for Linux and Mac.</li>
<li><a href="http://www.freecap.ru/eng/" class="external text" title="http://www.freecap.ru/eng/" rel="nofollow">FreeCap</a> Socksifyer for Windows, any App can run its network traffic transparently via a SOCKS or HTTP proxy.</li>
<li><a href="http://sourceforge.net/projects/ssspl" class="external text" title="http://sourceforge.net/projects/ssspl" rel="nofollow">Simple Socks Server for Perl</a>: SSS is a Simple SOCKS Server written in perl that implements the SOCKS v5 protocol.</li>
<li><a href="/wiki/Sun_Java_System_Web_Proxy_Server" title="Sun Java System Web Proxy Server">Sun Java System Web Proxy Server</a> is a caching proxy server running on Solaris, Linux and Windows servers that supports HTtp://S, NSAPI I/O filters, dynamic reconfiguration, SOCKSv5 and <a href="/wiki/Reverse_proxy" title="Reverse proxy">reverse proxy</a>.</li>
<li><a href="http://barracudaserver.com/products/BarracudaDrive/" class="external text" title="http://barracudaserver.com/products/BarracudaDrive/" rel="nofollow">BarracudaDrive Web Server</a>, commercial SOCKS HTTP HTTPS tunnel/server, available for Windows, embedded Linux and Mac OS X.</li>
<li><a href="/wiki/Delegate_(networking)" title="Delegate (networking)" class="mw-redirect">DeleGate</a> is a multi-purpose application level gateway and proxy server which runs on multiple platforms. Beside SOCKS it also supports HTTP(S), FTP, NNTP, SMTP, POP, IMAP, LDAP, Telnet, DNS and many more.</li>
<li><a href="http://www.handcraftedsoftware.org/index.php?page=5/" class="external text" title="http://www.handcraftedsoftware.org/index.php?page=5/" rel="nofollow">Freeproxy</a> Is free proxy server software. It supports HTTP, SOCKS, and many other protocols.</li>
<li><a href="/wiki/WinGate" title="WinGate">WinGate</a> is a multi-protocol proxy server and SOCKS server for Microsoft Windows.</li>
</ul>
<p><a name="References" id="References"></a></p>
<h2><span class="editsection">[<a href="/w/index.php?title=SOCKS&amp;action=edit&amp;section=9" title="Edit section: References">edit</a>]</span> <span class="mw-headline">References</span></h2>
<div class="references-small references-column-count references-column-count-2" style="-moz-column-count:2; column-count:2;">
<ol class="references">
<li id="cite_note-0"><b><a href="#cite_ref-0">^</a></b> Darmohray, Tina. "<a href="http://www.usenix.org/publications/login/2005-02/pdfs/firewalls.pdf" class="external text" title="http://www.usenix.org/publications/login/2005-02/pdfs/firewalls.pdf" rel="nofollow">Firewalls and fairy tales</a>".&#160;;LOGIN:. Vol 30, no. 1.</li>
<li id="cite_note-1"><b><a href="#cite_ref-1">^</a></b> <a href="http://www.socks.permeo.com/" class="external free" title="http://www.socks.permeo.com/" rel="nofollow">http://www.socks.permeo.com/</a> (broken link as of July 2008)</li>
<li id="cite_note-2"><b><a href="#cite_ref-2">^</a></b> <cite style="font-style:normal" class="web">"<a href="http://www.bluecoat.com/news/releases/2006/010306_permeo.html" class="external text" title="http://www.bluecoat.com/news/releases/2006/010306_permeo.html" rel="nofollow">News Release from</a>". Bluecoat. 2009-06-14<span class="printonly">. <a href="http://www.bluecoat.com/news/releases/2006/010306_permeo.html" class="external free" title="http://www.bluecoat.com/news/releases/2006/010306_permeo.html" rel="nofollow">http://www.bluecoat.com/news/releases/2006/010306_permeo.html</a></span><span class="reference-accessdate">. Retrieved 2009-06-19</span>.</cite><span class="Z3988" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=bookitem&amp;rft.btitle=News+Release+from&amp;rft.atitle=&amp;rft.date=2009-06-14&amp;rft.pub=Bluecoat&amp;rft_id=http%3A%2F%2Fwww.bluecoat.com%2Fnews%2Freleases%2F2006%2F010306_permeo.html&amp;rfr_id=info:sid/en.wikipedia.org:SOCKS"><span style="display: none;">&#160;</span></span></li>
<li id="cite_note-3"><b><a href="#cite_ref-3">^</a></b> <a href="http://www.infosecurityproductsguide.com/hot2006/PermeoTechnologies.html" class="external text" title="http://www.infosecurityproductsguide.com/hot2006/PermeoTechnologies.html" rel="nofollow">Article from</a> infosecurityproductsguide.com</li>
<li id="cite_note-4"><b><a href="#cite_ref-4">^</a></b> <cite style="font-style:normal" class="web">"<a href="http://tools.ietf.org/html/rfc1961" class="external text" title="http://tools.ietf.org/html/rfc1961" rel="nofollow">RFC 1961</a>". Tools.ietf.org<span class="printonly">. <a href="http://tools.ietf.org/html/rfc1961" class="external free" title="http://tools.ietf.org/html/rfc1961" rel="nofollow">http://tools.ietf.org/html/rfc1961</a></span><span class="reference-accessdate">. Retrieved 2009-06-19</span>.</cite><span class="Z3988" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=bookitem&amp;rft.btitle=RFC+1961&amp;rft.atitle=&amp;rft.pub=Tools.ietf.org&amp;rft_id=http%3A%2F%2Ftools.ietf.org%2Fhtml%2Frfc1961&amp;rfr_id=info:sid/en.wikipedia.org:SOCKS"><span style="display: none;">&#160;</span></span></li>
<li id="cite_note-5"><b><a href="#cite_ref-5">^</a></b> <cite style="font-style:normal" class="web">"<a href="http://tools.ietf.org/html/rfc1929" class="external text" title="http://tools.ietf.org/html/rfc1929" rel="nofollow">RFC 1929</a>". Tools.ietf.org<span class="printonly">. <a href="http://tools.ietf.org/html/rfc1929" class="external free" title="http://tools.ietf.org/html/rfc1929" rel="nofollow">http://tools.ietf.org/html/rfc1929</a></span><span class="reference-accessdate">. Retrieved 2009-06-19</span>.</cite><span class="Z3988" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=bookitem&amp;rft.btitle=RFC+1929&amp;rft.atitle=&amp;rft.pub=Tools.ietf.org&amp;rft_id=http%3A%2F%2Ftools.ietf.org%2Fhtml%2Frfc1929&amp;rfr_id=info:sid/en.wikipedia.org:SOCKS"><span style="display: none;">&#160;</span></span></li>
<li id="cite_note-6"><b><a href="#cite_ref-6">^</a></b> <a href="http://www.iana.org/assignments/socks-methods" class="external free" title="http://www.iana.org/assignments/socks-methods" rel="nofollow">http://www.iana.org/assignments/socks-methods</a></li>
<li id="cite_note-7"><b><a href="#cite_ref-7">^</a></b> <cite style="font-style:normal" class="web">"<a href="http://mindprod.com/jgloss/socksify.html" class="external text" title="http://mindprod.com/jgloss/socksify.html" rel="nofollow">SOCKSIFY&#160;: Java Glossary</a>". Mindprod.com. 1996-2008<span class="printonly">. <a href="http://mindprod.com/jgloss/socksify.html" class="external free" title="http://mindprod.com/jgloss/socksify.html" rel="nofollow">http://mindprod.com/jgloss/socksify.html</a></span><span class="reference-accessdate">. Retrieved 2008-10-23</span>.</cite><span class="Z3988" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=bookitem&amp;rft.btitle=SOCKSIFY+%3A+Java+Glossary&amp;rft.atitle=&amp;rft.date=1996-2008&amp;rft.pub=Mindprod.com&amp;rft_id=http%3A%2F%2Fmindprod.com%2Fjgloss%2Fsocksify.html&amp;rfr_id=info:sid/en.wikipedia.org:SOCKS"><span style="display: none;">&#160;</span></span></li>
</ol>
</div>
<p><a name="External_links" id="External_links"></a></p>
<h2><span class="editsection">[<a href="/w/index.php?title=SOCKS&amp;action=edit&amp;section=10" title="Edit section: External links">edit</a>]</span> <span class="mw-headline">External links</span></h2>
<ul>
<li><a href="http://www.tools.ietf.org/html/draft-ietf-aft-socks-chap" class="external text" title="http://www.tools.ietf.org/html/draft-ietf-aft-socks-chap" rel="nofollow">draft-ietf-aft-socks-chap</a>, Challenge-Handshake Authentication Protocol for SOCKS V5</li>
<li><a href="http://tools.ietf.org/html/rfc3089" class="external" title="http://tools.ietf.org/html/rfc3089">RFC 3089</a>: A SOCKS-based IPv6/IPv4 Gateway Mechanism</li>
<li><a href="http://tools.ietf.org/html/rfc1961" class="external" title="http://tools.ietf.org/html/rfc1961">RFC 1961</a>: GSS-API Authentication Method for SOCKS Version 5</li>
<li><a href="http://tools.ietf.org/html/rfc1929" class="external" title="http://tools.ietf.org/html/rfc1929">RFC 1929</a>: Username/Password Authentication for SOCKS V5</li>
<li><a href="http://tools.ietf.org/html/rfc1928" class="external" title="http://tools.ietf.org/html/rfc1928">RFC 1928</a>: SOCKS Protocol Version 5</li>
<li><a href="http://ftp.icm.edu.pl/packages/socks/socks4/SOCKS4.protocol" class="external text" title="http://ftp.icm.edu.pl/packages/socks/socks4/SOCKS4.protocol" rel="nofollow">SOCKS: A protocol for TCP proxy across firewalls</a>, SOCKS Protocol Version 4 (<a href="/wiki/NEC" title="NEC">NEC</a>)</li>
</ul>
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