How to build ipv6 with tunnel

**Introduction to Tunnel Technology** IPv6 is still in the experimental phase and has not yet reached the average user's home, but we can already sense its coming. For example, the world’s largest IPv6 experimental network, CERNET2, has been fully completed, and many students at Tsinghua University are already using IPv6 addresses. Despite this progress, most Internet Service Providers (ISPs) in mainland China do not support direct IPv6 access. Therefore, ordinary users who want to experience IPv6 must rely on tunneling technology. Tunneling is a transitional solution during the transition from IPv4 to IPv6. It allows IPv6 packets to be encapsulated and transmitted over existing IPv4 networks, eventually reaching an IPv6 network. Many research institutions and commercial companies around the world offer free IPv6 tunnel services. Some of the most commonly used ones include: - **Shanghai Jiaotong University** (http://ipv6.sjtu.edu.cn/news/041231.php): You can use it directly without applying. - **NECTEC** in Thailand (http://tb.ipv6.nectec.or.th/tb/index.php): Free application with immediate activation. - **Hurricane Electric** (http://tunnelbroker.net/tunnel_detail.php), also known as HENET: Free to apply, and the service becomes active after 24 hours. No matter which tunnel you choose, you will need a real public IP address to set it up. **How to Set Up an IPv6 Tunnel Without Being on the Campus Network** 1. Open the Command Prompt by going to Start → Accessories → Command Prompt. 2. Type `ipv6 install` and press Enter. 3. Wait until "Installing..." appears. 4. If successful, proceed to the next step. Next, go to `C:\Documents and Settings\user`, then type `netsh` and press Enter. Wait for the prompt `netsh>` to appear, then type `interface ipv6` and press Enter. Once you see `netsh>interface>ipv6`, type `isatap` and press Enter. Then, type `set router 10.1.18.33` and press Enter. If you see "Ok," the setup is successful. After that, you can browse the web using IPv6. Simply add `.sixxs.org` to the URL you want to visit. Baidu, for example, supports IPv6, making it easy to access the web without being connected to the campus network. **Second Tip: Accessing BT Sites Without a Campus Network** If you're into downloading movies, you might want to try the music BT site from Shanghai University at `bt.shu6.edu.cn`. Most six-dimensional BT sites require an invitation code to register, but this one doesn't. You don’t even need an education email address. An example is the email from Huangshi Institute of Technology: `mail.hsit.edu.cn`. Registration is straightforward, and the site offers massive resources with download speeds typically ranging from 10 Mbps upwards. **Third Tip: Using QQ via IPv6** If you can access the BT site, you’ll find a version of QQ there. Here’s how to use it: 1. Download .NET 2.0. 2. Install it. The download link is: http://bt6.shu6.edu.cn/details.php?TId=17967. 3. Download ProXY4To6. 4. Open ProXY4To6, set the port (default is 8888). You don’t need to open the flow. Then, open QQ, go to Settings → System Settings → Proxy Settings. Choose "Use Custom Network Settings," set the type to "HTTP," the server to "127.0.0.1," and the port to 8888, 66, or 6666 (make sure it matches the port in ProXY4To6). 5. Log in to QQ every time you use IPv6; make sure to keep ProXY4To6 running and consistent with the QQ port. **Fourth Tip: Watching TV via IPv6** Try the IPv6 Tianhu Network TV V2.0: 1. Open the program by double-clicking it. 2. To record a show, click the "Record" button at the bottom right and follow the prompts. This method makes it easier than ever to enjoy streaming content over IPv6.

Benchtop DC Power Supplies

SMP series Bench DC Power Supplies are economical, MOSFETs-based, high switching speed, high power density desktop DC power supplies with output power covering 300W ~ 6KW, and maximum voltage up to 800VDC.

Compared with IGBT-based DC switching power supplies, MOSFET-based switching power supplies have a higher switching frequency, making this series Benchtop DC power supplies can use smaller semiconductor devices and LC filter units while ensuring low ripple, high precision, and fast response characteristics of the Benchtop Laboratory Power Supplies DC output. Which gives more space to use a smaller chassis size at the same output power, resulting the high-power density feature of this series Benchtop AC DC power supplies.

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The main design purpose of this series of Bench AC-DC power supplies is to fulfill the needs of small laboratory test, precise experiment and universities.

At present, this series of Bench AC DC power supplies below 1KW adopts desktop chassis to match laboratory applications, they are mainly used in LED testing, small electroplating, heating of new materials, electrical component testing and other applications.

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