SETI@home DNS Server problem fix

SETI@home DNS Server problem fix
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References
https://support.rackspace.com/how-to/modify-your-hosts-file/
File: c:\Windows\System32\Drivers\etc\hosts (open editor as admin)
http://www.isitdownrightnow.com/setiathome.berkeley.edu.html
https://setiathome.berkeley.edu/forum_thread.php?id=81776 (amongst other threads)

208.68.240.118 setiboincdata.ssl.berkeley.edu # upload server Oct 2016
208.68.240.119 boinc2.ssl.berkeley.edu # Georgem download server Oct 2016
208.68.240.126 setiboinc.ssl.berkeley.edu # scheduler Oct 2016
208.68.240.110 setiathome.berkeley.edu # IP address for the messages/email system(s)
#208.68.240.127 vader.ssl.berkeley.edu    # Vader download server Oct 2016

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If the site is UP (you can use http://www.isitdownrightnow.com/setiathome.berkeley.edu.html to verify if it is) but you cant access the page, try one of the below solutions:

Browser Related Problems

 - Force a full refresh for the site. This can be achieved by pressing CTRL + F5 keys at the same time on your favourite browser (Firefox, Chrome, Explorer, etc.)

 - Try alternative urls such as setiathome.ssl.berkeley.edu

 - Clear the temporary cache and cookies on your browser to make sure that you have the most recent version of the web page.

   If you have to fix a DNS Problems :

A Domain Name System (DNS) allows a site IP address (192.168.x.x) to be identified with words (*.com) in order to be remembered more easily, like a phonebook for websites. This service is usually provided by your ISP.

Clear your local DNS cache to make sure that you grab the most recent cache that your ISP has. For Windows - (Start > Command Prompt (CMD.EXE) > type "ipconfig /flushdns" and hit enter). It is useful to know for confirmation purposes that sending the command ipconfig /displaydns will give you the ip adresses for setiathome.berkeley.edu

*** If nothing works, try modifying your hosts file. ***

    Last updated on: 2016-06-08 Authored by: Rackspace Support

Modifying your hosts file enables you to override the DNS for a domain, on that particular machine. This is useful when you want to test your site without the test link, prior to going live with SSL; verify that an alias site works, prior to DNS changes; and for other DNS-related reasons. Modifying your hosts file causes your local machine to look directly at the IP address specified.

To modify the hosts file, you add two entries to the file that contains the IP address that you want the site to resolve to and the address. Adding the following two lines, for example, point www.domain.com and domain.com to our current PHP5-ITK (“Refreshed” PHP5) cluster:

64.49.219.194 www.domain.com
64.49.219.194 domain.com

For SETI@home, the entries are :

208.68.240.118 setiboincdata.ssl.berkeley.edu # upload server Oct 2016
208.68.240.119 boinc2.ssl.berkeley.edu # download server Oct 2016
208.68.240.126 setiboinc.ssl.berkeley.edu # scheduler Oct 2016
208.68.240.110 setiathome.berkeley.edu # IP address for the messages/email system(s)

The sections in this article provide instructions for locating and editing the hosts file on the following operating systems:

    Windows 10, Windows 8, Windows 7, and Windows Vista
    Windows NT, Windows 2000, and Windows XP
    Linux
    Mac OS X 10.0 through 10.1.5
    Mac OS X 10.6 through 10.12

After you add the domain information and save the file, your system begins resolving to the specified IP address. After testing is finished, remove these entries.

Windows

Windows 10, Windows 8, Windows 7, and Windows Vista use User Account Control (UAC),
so Notepad must be run as Administrator.

For Windows 10 and 8

    Press the Windows key.
    Type Notepad in the search field.
    In the search results, right-click Notepad and select Run as administrator.
    From Notepad, open the following file: c:\Windows\System32\Drivers\etc\hosts
    Make the necessary changes to the file.
    Click File > Save to save your changes.

For Windows 7 and Vista

    Click Start > All Programs > Accessories.
    Right-click Notepad and select Run as administrator.
    Click Continue on the Windows needs your permission UAC window.
    When Notepad opens, click File > Open.
    In the File name field, type C:\Windows\System32\Drivers\etc\hosts.
    Click Open.
    Make the necessary changes to the file.
    Click File > Save to save your changes.

Windows NT, Windows 2000, and Windows XP

    Click Start > All Programs > Accessories > Notepad.
    Click File > Open.
    In the File name field, type C:\Windows\System32\Drivers\etc\hosts.
    Click Open.
    Make the necessary changes to the file.
    Click File > Save to save your changes.

Linux

    Open a terminal window.

    Open the hosts file in a text editor (you can use any text editor) by typing the following line:

    sudo nano /etc/hosts

    Enter your domain user password.
    Make the necessary changes to the file.
    Press Control-x.
    When asked if you want to save your changes, answer y.

Mac OS X 10.0 through 10.12

Mac OS X 10.0 through 10.1.5

    Open /Applications/Utilities/NetInfo Manager.
    To allow editing of the NetInfo database, click the padlock in the lower-left corner of the window.
    Enter your domain user password and click OK.

    In the second column of the browser view, select the node named machines.

    The third column contains entries for -DHCP-, broadcasthost, and localhost.
    In the third column, select localhost.

    From the Edit menu, select Duplicate. (The quickest way to create a new entry is to duplicate an existing one.)

    A confirmation alert appears.

    Click Duplicate.

    A new entry called localhost copy appears, and its properties are shown below the browser view.
    Double-click the value of the ip_address property and enter the IP address of the other computer.
    Double-click the value of the name property and enter the hostname you want for the other computer.
    Click the serves property and select Delete from the Edit menu.

    From the File menu, select Save.

    A confirmation alert appears.
    Click Update this copy.
    Repeat steps 6 through 12 for each additional host entry that you want to add.

    From the NetInfo Manager menu, select Quit.

    You do not need to restart the computer.

Mac OS X 10.6 through 10.12

    Open Applications > Utilities > Terminal.

    Open the hosts file by typing the following line in the terminal window:

    sudo nano /private/etc/hosts

    Type your domain user password when prompted.

    Edit the hosts file.

    The file contains some comments (lines starting with the # symbol), and some default hostname mappings (for example, 127.0.0.1 – local host). Add your new mappings after the default mappings.
    Save the hosts file by pressing Control+x and answering y.

    Make your changes take effect by flushing the DNS cache with the following command:

    dscacheutil -flushcache

The new mappings should now take effect.

-30-

Dowload servers problems :
# In case of server problems setiathome windows windows32 drivers etc hosts
208.68.240.118 setiboincdata.ssl.berkeley.edu # upload server Oct 2016
#208.68.240.119 boinc2.ssl.berkeley.edu # general download server Oct 2016
208.68.240.119	boinc2.ssl.berkeley.edu		# Georgem download server Oct 2016
#208.68.240.127  vader.ssl.berkeley.edu         # Vader download server Oct 2016
208.68.240.126 setiboinc.ssl.berkeley.edu # scheduler Oct 2016

# https://pastebin.com/sePA36DM
# https://support.rackspace.com/how-to/modify-your-hosts-file/