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Im doing project in proxy server.i want to develop coding for proxy server using cache concept.

Im doing project in proxy server.i want to develop coding for proxy server. 1.login 2.restricted sites 3.moitoring the client system 4.maintaining the cache memory 5.maintaining the ip address

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Hi

Use analog Proxy its too simple u can manage all thing what u want

Harry

Posted on Aug 10, 2009

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How can proxy server bolked ?


A proxy server is a computer used to act as the one contact point between your computer and the open Internet. The primary benefit of a proxy server as that it can cache (store) Internet web pages and other content on its disc drives. When a user connected to the proxy server requests a web page or content that was previously accessed by another user, the proxy server can deliver that content/page from its cache to the new user without having to go out to the Internet.

Network administrators can configure a proxy server to prevent users from reaching dangerous or unauthorized web sites. So if your computer is connecting to the Internet through a proxy server, you will be using whatever restrictions the network administrators have set up. If you are not using only your home network, you are most likely NOT using a proxy server. If you are using a school, university, organization or corporate network, then you are most likely USING a proxy server to connect.

Feb 28, 2015 | Computers & Internet

2 Answers

Unable to connect to the proxy server A proxy


This is a brain-dead system default setting from Microsoft. If your company/network requires you to use a proxy server, they can make it happen invisibly to you. There is nothing wrong with turning it off except that your connection might slow down if there is a proxy on your network and you don\'t use it. Proxy can cache (save recent pages) and/or restrict your access (filter porn sites). Filtering should be invisible or not configurable by users. The MS default is just plain wrong.

Oct 11, 2013 | Google Chrome

1 Answer

I am trying to downlaod something but i need to wright a proxy sever but i don't know what a proxy sever is or how to do it?


In computer networks, a proxy server is a server (a computer system or an application program) that acts as an intermediary for requests from clients seeking resources from other servers. A client connects to the proxy server, requesting some service, such as a file, connection, web page, or other resource, available from a different server. The proxy server evaluates the request according to its filtering rules. For example, it may filter traffic by IP address or protocol. If the request is validated by the filter, the proxy provides the resource by connecting to the relevant server and requesting the service on behalf of the client. A proxy server may optionally alter the client's request or the server's response, and sometimes it may serve the request without contacting the specified server. In this case, it 'caches' responses from the remote server, and returns subsequent requests for the same content directly.
A proxy server has a large variety of potential purposes, including:
1: To keep machines behind it anonymous (mainly for security.
2: To speed up access to resources (using caching). Web proxies are commonly used to cache web pages from a web server.
3: To apply access policy to network services or content, e.g. to block undesired sites
4: To log / audit usage, i.e. to provide company employee Internet usage reporting
5: To bypass security/ parental controls

Aug 01, 2010 | Computers & Internet

1 Answer

When im on fb it just blocks me out of it...n im not doin it..how do i stop it??


You can try two different solutions:
.
Solution 1
Download Firefox 3.5 and used that instead of Internet Explorer.
here is the link for downloading it
http://www.mozilla.com/en-US/firefox/personal.html
.
Solution 2
Use a Proxy Server to connect to Facebook.com
1. Search Proxy in GOOGLE
2. Select Proxy Server
3. Type in facebook.com (in the proxy server webpage)
4. login into facebook account
5. Enjoy (although all games will work but Farmville may have problems loading)
.
recommended Proxy Server >http://www.youtubeproxy.ws/
.
If you found this information helpful, please give me a big thumbs up when you rate my answer. Thanks.

Feb 04, 2010 | Computers & Internet

1 Answer

Difference between proxy server firewall and something called a gateway firewall ....Just a homework question..need another angle other then the veryconfusing textbook


In computer networks, a proxy server is a server (a computer system or an application program) that acts as an intermediary for requests from clients seeking resources from other servers. A client connects to the proxy server, requesting some service, such as a file, connection, web page, or other resource, available from a different server. The proxy server evaluates the request according to its filtering rules. For example, it may filter traffic by IP address or protocol. If the request is validated by the filter, the proxy provides the resource by connecting to the relevant server and requesting the service on behalf of the client. A proxy server may optionally alter the client's request or the server's response, and sometimes it may serve the request without contacting the specified server. In this case, it 'caches' responses from the remote server, and returns subsequent requests for the same content directly.
A proxy server has many potential purposes, including:
  • To keep machines behind it anonymous (mainly for security).[1]
  • To speed up access to resources (using caching). Web proxies are commonly used to cache web pages from a web server.[2]
  • To apply access policy to network services or content, e.g. to block undesired sites.
  • To log / audit usage, i.e. to provide company employee Internet usage reporting.
  • To bypass security/ parental controls.
  • To scan transmitted content before delivery for malware.
  • To scan outbound content, e.g. for data leak protection.
  • To circumvent regional restrictions.
A proxy server that passes requests and replies unmodified is usually called a gateway or sometimes tunneling proxy.
A proxy server can be placed in the user's local computer or at various points between the user and the destination servers on the Internet.
A reverse proxy is a (usually) Internet-facing proxy used as a front-end to control and protect access to a server on a private network, commonly also performing tasks such as load-balancing, authentication, decryption or caching

A firewall is a dedicated appliance, or software running on a computer, which inspects network traffic passing through it, and denies or permits passage based on a set of rules.
It is a software or hardware that is normally placed between a protected network and an unprotected network and acts like a gate to protect assets to ensure that nothing private goes out and nothing malicious comes in.
A firewall's basic task is to regulate some of the flow of traffic between computer networks of different trust levels. Typical examples are the Internet which is a zone with no trust and an internal network which is a zone of higher trust. A zone with an intermediate trust level, situated between the Internet and a trusted internal network, is often referred to as a "perimeter network" or Demilitarized zone (DMZ).
A firewall's function within a network is similar to physical firewalls with fire doors in building construction. In the former case, it is used to prevent network intrusion to the private network. In the latter case, it is intended to contain and delay structural fire from spreading to adjacent structures.
Without proper configuration, a firewall can often become worthless. Standard security practices dictate a "default-deny" firewall ruleset, in which the only network connections which are allowed are the ones that have been explicitly allowed. Unfortunately, such a configuration requires detailed understanding of the network applications and endpoints required for the organization's day-to-day operation. Many businesses lack such understanding, and therefore implement a "default-allow" ruleset, in which all traffic is allowed unless it has been specifically blocked. This configuration makes inadvertent network connections and system compromise much more likely.

Dec 11, 2009 | Office Equipment & Supplies

1 Answer

A good proxy software


Proxy server is for internet caching.
I suggest the following:
If your server running Linux, Squid is a good proxy software ...

If your server running Windows ISA server from Microsoft is a
good alternative.

Jan 12, 2009 | Computers & Internet

1 Answer

Hello


SOCKS is an Internet protocol that facilitates the routing of network packets between client-server applications via a proxy server. SOCKS performs at Layer 5 of the OSI model - the Session Layer (an intermediate layer between the presentation layer and the transport layer).

Clients behind a firewall may connect to a SOCKS proxy server in order to access external services through the firewall. Such a proxy server controls the eligibility of the client to access the external server and, if the client has eligibility, passes the request on to the server. SOCKS can also be used in the opposite way, allowing the clients outside the firewall ("exterior clients") to connect to servers inside the firewall (internal servers).

SOCKS software

* Kernel SOCKS Bouncer 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.
* SS5 Socks Server is an open-source SOCKS4/SOCKS5 server.
* Dante is an open-source SOCKS4/SOCKS5 implementation with commercial support developed by Inferno Nettverk A/S.
* OpenSSH allows dynamic creation of tunnels, specified via a subset of the SOCKS protocol, supporting the CONNECT command.
* WinSocks is a light-weight SOCKS4/SOCKS5 server developed by Proxy Labs.
* SOcat Multipurpose relay (SOcket CAT): includes socks4, and socks4a functionality (Linux / Mac)
* FreeCap Socksifyer for Windows, any App can run its network traffic transparently via a SOCKS or HTTP proxy.
* Simple Socks Server for Perl - SSS is a Simple SOCKS Server written in perl that implements the SOCKS v5 protocol.
* Sun Java System Web Proxy Server is a caching proxy server running on Solaris, Linux and Windows servers that supports HTtp://S, NSAPI I/O filters, dynamic reconfiguration, SOCKSv5 and reverse proxy.
* BarracudaDrive Web Server - commercial SOCKS HTTP HTTPS tunnel/server, available for Windows, embedded Linux and Mac OS X (PowerPC)
* DeleGate 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.

Jan 05, 2009 | Computers & Internet

2 Answers

Proxy sever


A server that sits between a client application, such as a Web browser, and a real server
. It intercepts all requests to the real server to see if it can fulfill the requests itself. If not, it forwards the request to the real server.


Proxy servers have two main purposes:

# Improve Performance: Proxy servers can dramatically improve performance for groups of users. This is because it saves the results of all requests for a certain amount of time. Consider the case where both user X and user Y access the World Wide Web through a proxy server. First user X requests a certain Web page, which we'll call Page 1. Sometime later, user Y requests the same page. Instead of forwarding the request to the Web server where Page 1 resides, which can be a time-consuming operation, the proxy server simply returns the Page 1 that it already fetched for user X. Since the proxy server is often on the same network as the user, this is a much faster operation. Real proxy servers support hundreds or thousands of users. The major online services
such as America Online, MSN and Yahoo, for example, employ an array of proxy servers.


# Filter Requests: Proxy servers can also be used to filter requests. For example, a company might use a proxy server to prevent its employees from accessing a specific set of Web sites.



A proxy server receives a request for an Internet service (such as a Web page request) from a user. If it passes filtering requirements, the proxy server, assuming it is also a cache server , looks in its local cache of previously downloaded Web pages. If it finds the page, it returns it to the user without needing to forward the request to the Internet. If the page is not in the cache, the proxy server, acting as a client on behalf of the user, uses one of its own IP addresses to request the page from the server out on the Internet. When the page is returned, the proxy server relates it to the original request and forwards it on to the user.

To the user, the proxy server is invisible; all Internet requests and returned responses appear to be directly with the addressed Internet server. (The proxy is not quite invisible; its IP address has to be specified as a configuration option to the browser or other protocol program.)

An advantage of a proxy server is that its cache can serve all users. If one or more Internet sites are frequently requested, these are likely to be in the proxy's cache, which will improve user response time. In fact, there are special servers called cache servers. A proxy can also do logging.

The functions of proxy, firewall, and caching can be in separate server programs or combined in a single package. Different server programs can be in different computers. For example, a proxy server may in the same machine with a firewall server or it may be on a separate server and forward requests through the firewall.

Dec 17, 2008 | Sega Medieval II: Total War for Windows

1 Answer

Errors found:Code 8024402C Windows can't check for updates


Description:
The 0×8024402C error code occurs because an incorrect character exists in the proxy override settings.
Possible Cause/s:
1. Incorrect character exists in the proxy override settings.
2. A misconfigured Proxy/Firewall can cause this problem.
3. You are trying to access Windows Update using VPN. The website and Automatic Update may not function properly.
4. The corporate environment does not have autoproxy implemented.
5. Your workstations sits behind a Microsoft ISA server.
Resolution 1:
Remove invalid characters from the proxy exception list and then clear the proxy cache:
1. Open Internet Explorer.
2. On the Tools, select Internet Options.
3. Click on the Connections tab.
4. Click on the LAN Settings.
5. Click on the Advanced button.
6. Please delete any entry in the Exceptions section.
Next, clear your proxy cache:
1. Click on Start, and then click Run.
2. Type cmd in the Open box to get a DOS prompt.
3. Type proxycfg -d at the command prompt, and press Enter.
4. Type net stop wuauserv at the command prompt, and press Enter.
5. Type net start wuauserv at the command prompt, and press Enter.
6. Now try the site again.
Resolution 2:
Reconfigure or update your firewall program:
1. Double-check the Proxy/Firewall settings. Add the following urls to the exception list within your Firewall/Proxy:
http://*.windowsupdate.microsoft.com
https://*.windowsupdate.microsoft.com
http://download.windowsupdate.com
Resolution 3:
VPN and Proxy.
You are trying to access Windows Update using VPN. The website and Automatic Update may not function properly.
Autoproxy is not picking up the wpad.dat proxy configuration file to determine the proxy to be used for the target URL. Thus we are going with no proxy!
1. Try to access Windows Update while not using VPN connection.
2. Use the proxycfg tool to specify a proxy server to use (proxycfg.exe -p <proxy server>). (contact your network administrator to find out the name and port of this proxy.)
This is every possible cause and solution for this error code and how to fix it. Please take the time to rate this Fixya for me for spending an hour researching every possible cause and solution for this code you posted for free, even if you don't figure it out. The solution to your problem is definitely here so read it carefully.

Jul 30, 2008 | Computers & Internet

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