**XJTUANA** is a student society under the guidance of NIC. XJTUANA was established on 2014, it achieved A-level society status within only 3 years. Members of XJTUANA volunteer to maintain the network in student dormitories. We are not a part of school administration and definitely not computer repairman or customer service from ISPs. All of us are students at school, working as hard as we can to solve the network problems within our reach. Please be kind to us even if your problems are not answered or solved immediately. In the meantime, we welcome any feedback regarding quality of our service.
The focus of our work is the **Campus network in student dormitories**. If you encounter problems regarding network in offices or labs, please contact NIC directly. Problems with ISPs such as China Telecom, China Unicom or China Mobile are also out of our reach. - Office or labs – Contact NIC；Telephone: 029-82667777；Address: Network and Information Center, east side of Qian Xuesen Library
Wrong password, log in to check if you remember the correct password. The log in password used on auth.xjtu.edu.cn IS your Internet authentication password. <br> <br> Update<br> Overdue Internet fees may also cause this problem. If an account has fees overdue, usually its Internet access will be disabled on 20th next month. Go to **[Date Usage Inquiry System](http://auth.xjtu.edu.cn)** to check out if you have Internet fees overdue.
If you are the only one encountering this problem in your dormitory, the problem may be solved by reinstalling network adapter driver or Windows operating system. You may also buy a router to solve this problem. You don’t need to dial with your computer if you access the Internet using a router.
Usually this happens when you type in a wrong password or have Internet fees overdue. Try log in the <a href="http://auth.xjtu.edu.cn">Date Usage Inquiry System</a>, if you can log in successfully, then you can rule out the password error and check out if you have any fees overdue. <br> <br> Update:<br> Log in from multiple locations or log out abnormally may also cause this error, the system regards you as an online user therefore prevents you from dialing. If this happens, no further actions are required, you just need to wait several minutes to dial again. <br> <br> Update:<br> Official Answer from NIC<br> Error 629: Port disconnected by the remote computer (Same as Error 678)<br> Possible Problem：No response from remote computer, disconnected; ISP server error, network adapter error, network protocol error caused by abnormal shutdown <br> Solution: Reconnecting, checking the wiring.<br> <br> Error 691: Access was denied because the user name and/or password was invalid on the domain<br> Probably caused by: <br> 1) Invalid username or password<br> 2) Last dialing session ended abnormally, user was not removed properly from the online user list, the BRAS (Broadband Remote Access Server) prevents you from dialing. <br> 3) The account was expired or locked for overdue fees. <br> Solution:<br> 1）Make sure you entered the correct login confidential, check the spelling. Both username and password are case-sensitive. Try log in the <a href="http://auth.xjtu.edu.cn">Date Usage Inquiry System</a> if you can log in successfully, then you can rule out the password error (The log in password used on auth.xjtu.edu.cn IS your Internet authentication password); if you cannot log in，Click “Recover Password” button on the same page. <br> 2）Wait <b>15 minutes</b> and dial again; <br> 3）Call XJTUNIC at 82667777.
Usually caused by Windows services <br> <ol class="fg-red"><li>Press <code>Win+R</code>, type <code>services.msc</code>, Enter；</li> <li>Looking for <code>Device Install Service </code> and <code>Device Setup Manager</code> on the right side of the window, set their “Start Type” to “Automatic”. Restart the computer and try dial again.</li> <li>If the problem persists, you may need to reinstall Windows or buy a router(recommended). You don’t need to dial with your computer if you access the Internet using a router. </li></ol>
Official reply from NIC<br> Error 678: The remote computer did not respond <br> Client cannot connect to the BRAS (Broadband Remote Access Server), can be caused by the malfunction of one or many devices on the way from your computer to the BRAS. <br> Solution: <br> 1. Check if your modem and network adapter are working properly <br> 2. Check all the wirings.
Error 651: The modem (or other connecting device) has reported an error If you are the only one encountering this problem in your dormitory, check the wiring first. The problem may be solved by reinstalling network adapter driver or Windows operating system. You may also buy a router to solve this problem. You don’t need to dial with your computer if you access the Internet using a router. If the whole dormitory have Error 615 at once, submit a ticket<br>
Official Answer from NIC <br> The last connecting attempt is failed; the new connecting attempt follows up too quickly, therefore could not be answered by the server.<br> Solution: Try again in 10-15 minutes.
Usually caused by abnormal logout. If this happens, no further actions are required, you just need to wait 20 minutes to dial again. If the problem persists, your login confidential maybe compromised, change your password immediately. Notice: After password change the current user will not be kicked offline, but when they log out, they will not be able to log in with the old password. <br> <br> Update: <br> NIC has implemented the force logout function. Click “Log out” on the authentication page to force the other user to log out.
Usually this is caused by browser. Type 10.6.8.2 in the address bar, if the authentication page opens, you may add the page to your favorite for future use. If you cannot open the authentication page this way, these are the probable causes: <b>1. DNS Configuration error<b/> <b>2. VPN or other similar virtual network utilities are not disconnected properly.<b/> <b>3. Correct IP address could not be retrieved. <b/> <b>Notes: all these problems mentioned above are problems of your personal computers, for which we are not responsible. If you submit a ticket, we may try to solve your problem, but there is not guarantee. <b/>
PPPoE dialing only grants the ip address to the client, any data usage and fees will only be counted towards the account logged in the authentication page<code>10.6.8.2</code>So remember to log out on that page if you don’t need internet connection
First, if you are using a router, check if your router supports IPv6. Most of the routers on the market do not support IPv6. Plugging uplink cable into the LAN of router downgrades your router into a switchbox, which is not relevant to this issue. <br> Second, NIC states that Windows XP and Mac OSX operating systems are currently unable to use IPv6 Network.