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How do we know if the port is blocked?
The original version of qq used port 4000, but now it is 5000 or 8000. Start-run. You can check the port usage by typing netstat -ano. Qq is blocked, and it is easy to be broken. You can install a proxy server software on this machine, and then set up a proxy server to surf the Internet, ip 127.0.0. 1.

The method of breaking through the blockade of QQ and MSN ports by unit network management

Many companies' firewalls have made strict restrictions, which makes many network services such as QQ and MSN unable to transmit.

Ok, if you can still open the web page, then using Http channel software can let you break through the restrictions. You can

Use any network service under the existing network conditions.

Using Http channel software can break through the limitation of firewall and obtain it by using unique Http access rights.

He uses the internet. So what is a channel? The so-called channel here refers to a way to bypass the firewall.

The communication mode of port shielding. The packets at both ends of the firewall are encapsulated in the packet types allowed by the firewall.

Or port, and then communicate with each other through the firewall. When an encapsulated packet arrives at its destination, it will

Recover the data packet and forward the recovered data packet to the corresponding server.

Http-Tunnel is a company specializing in providing http channel services. Through their online tunnel,

Servers and users in LAN can use ICQ, E-mail and PC anywhere, which are protected by firewall.

, MSN, QQ, Napster and other software.

The tunnel server using Http-tunnel must use the client program Http-

The free versions of tunnel client and Http-Tunnel client allow 40Kb/ s data forwarding service.

In this way, ccproxy proxy software should also be possible.

I. Program installation and setup

1. Run the downloaded installation program. The installation process is relatively simple and can be completed until the next step.

2. After the installation is completed, the "Configuration" window will pop up to set up the Internet of this machine.

Connection, there are three options:

A) Automatic detection: If you don't know the connection of your machine, you can choose this one.

A.

B) No proxy, only firewall (with firewall): using LAN and direct

Internet users choose this.

C) Designated proxy: If you use a proxy server to access the Internet, please select this option.

At the same time, you must also enter the address and port of the proxy server. If you need a user name and password, you need it.

Enter them together.

After the connection is established, you can click the "Test" button to test it. If you see "test"

The prompt "successful" means that the content you set has been completed.

4. After the program runs normally, it can be minimized, and it will generate a message in the prompt area of the taskbar.

Icon, click to restore.

Second, set up QQ access

Because the port used by QQ for external access is 4000, network administrators usually limit the port.

Used to restrict QQ access. Here is how to set QQ access.

1. Open QQ, click "QQ Menu" button and select "System Parameters".

2. In the QQ parameter setting window that pops up, select "Network Settings".

3. Check "Use proxy server".

4. Enter the proxy server address: 127.0.0. 1 and the port number: 1080.

Ok, close all windows and log in again to use QQ.

Third, set up msn access

MSN access settings may be similar to QQ, but the access settings are as follows:

1. Select the Edit menu, and then select Settings to open the settings window.

2. Expand Connections and select SOCKS and SOCKs4. Host: 127.0.0. 1 port: 1080.

. (tu5.bmp)

3. select "firewall" and check "enable firewall access" and "PASV mode"

4. Ok, close all windows, and then choose the site where you log in and download files.

Five, set up Windows XP remote desktop connection using Http-Tunnel.

Because remote desktop connection does not provide the interface set by proxy server, it can't be like QQ, msn and

Cuteftp is direct. At this time, we can use SocksCap to help us complete it. The specific steps are as follows.

1. Install SocksCap.

2. Run SOCKCAP, and select Settings from the File menu to pop up the SOCKCAP Settings dialog box.

.

3. Fill in "server /SOCKS server" with 127.0.0. 1 and "port" with 1080.

4. Select SOCKS Version 4 in Protocol and Resolve All in Domain Name Resolution.

Remote naming ".

5. Click "New" button and enter mstsc in "Identifier Name".

6. Click the Browse button to find the location of the MStsc.exe file.

7. Click the "OK" button.

When using, double-click the mstsc icon in the SocksCap list, start mstsc, and mstsc can access the network.

Will be carried out through the institutional springboard. It should be noted that mstsc must be started from SocksCap, otherwise it will not.

A proxy springboard will be used. In fact, many Internet applications that can't set a firewall can pass.

In this way, the function of Http channel is realized.