Proxy Server - Revision history

Eversom at 15:35, 4 April 2009

2009-04-04T15:35:45Z

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	Abuse of open proxies is currently implicated in a significant portion of e-mail spam delivery. Spammers frequently install open proxies on unwitting end users' Microsoft Windows computers by means of computer viruses designed for this purpose. Internet Relay Chat (IRC) abusers also frequently use open proxies to cloak their identities.		Abuse of open proxies is currently implicated in a significant portion of e-mail spam delivery. Spammers frequently install open proxies on unwitting end users' Microsoft Windows computers by means of computer viruses designed for this purpose. Internet Relay Chat (IRC) abusers also frequently use open proxies to cloak their identities.

-	Because proxies could be implicated in abuse, system administrators have developed a number of ways to refuse service to open proxies. IRC networks such as the Blitzed network automatically test client systems for known types of open proxy. Likewise, an email server may be configured to automatically test e-mail senders for open proxies, using software such as Michael Tokarev's proxycheck.	+	Because proxies could be implicated in abuse, system administrators have developed a number of ways to refuse service to open proxies. IRC networks such as the Blitzed network automatically test client systems for known types of open proxy. Likewise, an email server may be configured to automatically test e-mail senders for open proxies, using software such as Michael Tokarev's proxycheck. [3]

	Groups of IRC and electronic mail operators run DNSBLs publishing lists of the IP addresses of known open proxies, such as Blitzed OPM and CBL.		Groups of IRC and electronic mail operators run DNSBLs publishing lists of the IP addresses of known open proxies, such as Blitzed OPM and CBL.
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	*[http://whatis.techtarget.com/definition/0,,sid9_gci212840,00.html] - Proxy Server Functionality		*[http://whatis.techtarget.com/definition/0,,sid9_gci212840,00.html] - Proxy Server Functionality
	*[http://www.how-to-hide-ip.info/2008/01/16/types-of-proxy-sites/] - Proxy Site Types		*[http://www.how-to-hide-ip.info/2008/01/16/types-of-proxy-sites/] - Proxy Site Types
		+	*[http://www.corpit.ru/mjt/proxycheck.html] - Michael Tokarev's ProxyCheck

	== See Also ==		== See Also ==

Eversom at 15:34, 4 April 2009

2009-04-04T15:34:18Z

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	* [http://whatismyipaddress.com/staticpages/index.php/open-proxies-abuse-detection Open Proxies] at WhatIsMyIP		* [http://whatismyipaddress.com/staticpages/index.php/open-proxies-abuse-detection Open Proxies] at WhatIsMyIP

-	--[[User:Eversom\|Eversom]] 14:12, ~~12 March~~ 2009 (EDT)	+	--[[User:Eversom\|Eversom]] 11:34, 4 April 2009 (EDT)

Eversom at 05:00, 4 April 2009

2009-04-04T05:00:24Z

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	There are a number of beneficial reasons to use proxy servers. They are as follows:		There are a number of beneficial reasons to use proxy servers. They are as follows:
		+

	1. Can create virtual UDP and TCP connections and manage them using state information.		1. Can create virtual UDP and TCP connections and manage them using state information.
		+
	2. Reduces exposure of internal clients and servers.		2. Reduces exposure of internal clients and servers.
		+
	3. Reduces logins required on firewall hosts.		3. Reduces logins required on firewall hosts.
		+
	4. Can cache requested information.		4. Can cache requested information.
		+
	5. Can translate network addresses.		5. Can translate network addresses.
		+
	6. Can be transparent to users.		6. Can be transparent to users.
		+
	7. Can relay requests safely across firewalls.		7. Can relay requests safely across firewalls.
		+
	8. Fewer bad things happen!		8. Fewer bad things happen!

Eversom at 03:37, 4 April 2009

2009-04-04T03:37:49Z

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	A '''proxy server''' is a server that acts as a liaison between a client seeking resources and a server that can provide that resource. The client makes a request to the proxy, which then evaulates the request according to its pre-set filtering rules. If the request is validated, the proxy makes the request of the target server on behalf of the client and provides the resource to the client. Sometimes the proxy server may modify the client's request or the server's response based on the filtering rules, and may even contact a server different than the specified one in order to provide the requested resource. Proxies are used to ensure security, administrative control and caching services.		A '''proxy server''' is a server that acts as a liaison between a client seeking resources and a server that can provide that resource. The client makes a request to the proxy, which then evaulates the request according to its pre-set filtering rules. If the request is validated, the proxy makes the request of the target server on behalf of the client and provides the resource to the client. Sometimes the proxy server may modify the client's request or the server's response based on the filtering rules, and may even contact a server different than the specified one in order to provide the requested resource. Proxies are used to ensure security, administrative control and caching services.
-
-	~~There are three very good reasons to use a proxy server: They prevent the necessity of direct TCP/UDP connections, they can relay requests across a firewall, and in general fewer bad things happen!~~

	== Functionality ==		== Functionality ==
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	=== Distorting Proxy ===		=== Distorting Proxy ===
	This type of proxy server identifies itself as a proxy server, but makes an incorrect original IP address available through the http headers.		This type of proxy server identifies itself as a proxy server, but makes an incorrect original IP address available through the http headers.
		+
		+
		+	== Benefits of Using a Proxy Server ==
		+
		+	There are a number of beneficial reasons to use proxy servers. They are as follows:
		+
		+	1. Can create virtual UDP and TCP connections and manage them using state information.
		+	2. Reduces exposure of internal clients and servers.
		+	3. Reduces logins required on firewall hosts.
		+	4. Can cache requested information.
		+	5. Can translate network addresses.
		+	6. Can be transparent to users.
		+	7. Can relay requests safely across firewalls.
		+	8. Fewer bad things happen!

Eversom at 03:35, 4 April 2009

2009-04-04T03:35:22Z

← Older revision		Revision as of 03:35, 4 April 2009
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	A '''proxy server''' is a server that acts as a liaison between a client seeking resources and a server that can provide that resource. The client makes a request to the proxy, which then evaulates the request according to its pre-set filtering rules. If the request is validated, the proxy makes the request of the target server on behalf of the client and provides the resource to the client. Sometimes the proxy server may modify the client's request or the server's response based on the filtering rules, and may even contact a server different than the specified one in order to provide the requested resource. Proxies are used to ensure security, administrative control and caching services.		A '''proxy server''' is a server that acts as a liaison between a client seeking resources and a server that can provide that resource. The client makes a request to the proxy, which then evaulates the request according to its pre-set filtering rules. If the request is validated, the proxy makes the request of the target server on behalf of the client and provides the resource to the client. Sometimes the proxy server may modify the client's request or the server's response based on the filtering rules, and may even contact a server different than the specified one in order to provide the requested resource. Proxies are used to ensure security, administrative control and caching services.

-	There are three very good reasons to use a proxy server:	+	There are three very good reasons to use a proxy server: They prevent the necessity of direct TCP/UDP connections, they can relay requests across a firewall, and in general fewer bad things happen!
-	~~1. Prevents~~ the necessity of direct TCP/UDP connections	+
-	~~2. Can~~ relay requests across a firewall	+
-	~~3. Fewer~~ bad things happen!	+

	== Functionality ==		== Functionality ==

Eversom at 03:34, 4 April 2009

2009-04-04T03:34:39Z

← Older revision		Revision as of 03:34, 4 April 2009
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	A '''proxy server''' is a server that acts as a liaison between a client seeking resources and a server that can provide that resource. The client makes a request to the proxy, which then evaulates the request according to its pre-set filtering rules. If the request is validated, the proxy makes the request of the target server on behalf of the client and provides the resource to the client. Sometimes the proxy server may modify the client's request or the server's response based on the filtering rules, and may even contact a server different than the specified one in order to provide the requested resource. Proxies are used to ensure security, administrative control and caching services.		A '''proxy server''' is a server that acts as a liaison between a client seeking resources and a server that can provide that resource. The client makes a request to the proxy, which then evaulates the request according to its pre-set filtering rules. If the request is validated, the proxy makes the request of the target server on behalf of the client and provides the resource to the client. Sometimes the proxy server may modify the client's request or the server's response based on the filtering rules, and may even contact a server different than the specified one in order to provide the requested resource. Proxies are used to ensure security, administrative control and caching services.
		+
		+	There are three very good reasons to use a proxy server:
		+	1. Prevents the necessity of direct TCP/UDP connections
		+	2. Can relay requests across a firewall
		+	3. Fewer bad things happen!

	== Functionality ==		== Functionality ==
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	=== Credential-based Kerberos Services ===		=== Credential-based Kerberos Services ===
	A Secured Over Credential-based Kerberos Services (SOCKS) proxy server simply provides the task of transferring data from a client to a server using any number of protocols so that according to the point of view of an Internet web server, the SOCKS server appears to be a client in itself. Because a SOCKS proxy server does not add anything from itself or change the data it is transferring from the true client, anonymity of this type of proxy server is really always absolute.[2]		A Secured Over Credential-based Kerberos Services (SOCKS) proxy server simply provides the task of transferring data from a client to a server using any number of protocols so that according to the point of view of an Internet web server, the SOCKS server appears to be a client in itself. Because a SOCKS proxy server does not add anything from itself or change the data it is transferring from the true client, anonymity of this type of proxy server is really always absolute.[2]
-