OpenDNS and unable to find LanSync - D-Tools Forum

04-21-2009, 04:04 PM

Just making a post to help users out with something we found out yesterday.

We had never been able to see LanSync on any machine except the machine it was installed on. We are a smaller company so its wasnt that big of a deal at the time, but as we are growing we had to fix this.

What we found is that our server name was/is dtserver and we can access this computer just fine on the network at \\dtserver, but if you ping or try to resolve the name, it comes back with 208.xx.xx.xx, not 192.168.1.99. Once we found this problem we disabled OpenDNS and now could resolve this name at 192.168.1.99 and now LanSync was visible. Playing around with OpenDNS, we figured out if you turn typo-correction off it will resolve the named server correctly on the internal network. And yes you could also edit the host file on each machine as well.

Anyway, just wanted to throw this post up in case anyone else is having a similar issue.

Tim

JoseM · 10-25-2009, 06:10 AM

Tim - This is a great post and thank you for sharing. Many users have ran across this issue because they use a 3rd party DNS provider like OpenDNS.

JoseM · 10-25-2009, 06:13 AM

BTW for those that do not know how to edit their host file, here's a great write up (borrowed from another site - Click Here)

How-To: Edit your HOSTS file in XP

Please note this post only pertains to machines with Windows XP installed.

Access is prevented to the websites listed in your HOSTS file, so if you're irritated by a particular pop-up, for example, you could simply add the website it’s coming from to your HOSTS file.

The first step in editing your HOSTS file is to find it.

My Computer > C: (or whatever drive Windows is on) > WINDOWS > system32 > drivers > etc > hosts

Note: If you aren't sure where My Computer is or you just want to use a keyboard shortcut to open it, you can hold down the Windows key (which looks like this) on your keyboard while you press the “E” key.

Right-click on the HOSTS file, and click Open. A window will appear asking what to open it with; find Notepad, select it, and click OK.

If you've never edited your HOSTS file before, this is what it should look like:

# Copyright (c) 1993-1999 Microsoft Corp.
#
# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.
#
# This file contains the mappings of IP addresses to host names. Each
# entry should be kept on an individual line. The IP address should
# be placed in the first column followed by the corresponding host name.
# The IP address and the host name should be separated by at least one
# space.
#
# Additionally, comments (such as these) may be inserted on individual
# lines or following the machine name denoted by a '#' symbol.
#
# For example:
#
# 102.54.94.97 rhino.acme.com # source server
# 38.25.63.10 x.acme.com # x client host

127.0.0.1 localhost

You'll notice all entries begin with “127.0.0.1”; all entries MUST begin with this. If a website is preceded by “127.0.0.1”, this means the website cannot load and is blocked. The first entry in the HOSTS file is “127.0.0.1 localhost”. Your HOSTS file MUST begin with that entry.

To add websites to your HOSTS file (to block them), use this as a guideline:
Code:
127.0.0.1 www.blockthiswebsite.com
After you've edited your HOSTS file, save the changes made (File > Save).

You’re done!

Optional but recommended:

If you would like to use a pre-made HOSTS file, I recommend you use the MVPS HOSTS file. This HOSTS file blocks websites with ads/banners, parasites, hijackers, and unwanted search engines.

Quote:
Originally Posted by MVPS.org
In many cases using a well designed HOSTS file can speed the loading of web pages by not having to wait for these ads, annoying banners, hit counters, etc. to load. This also helps to protect your Privacy and Security by blocking sites that may track your viewing habits, also known as "click-thru tracking" or Data Miners. Simply using a HOSTS file is not a cure-all against all the dangers on the Internet, but it does provide another effective "Layer of Protection".
If you would like to use the MVPS HOSTS file, open your HOSTS file and delete everything in it. Copy everything in the MVPS HOSTS file (a quick way to select everything is Ctrl+A, then right-click > Copy). Once everything is copied, paste it into your HOSTS file (right-click > Paste). Then, you can save.

Optional but recommended:

I would also suggest you make your HOSTS file read-only. This is not necessary, but by doing so, it makes it harder for malicious software to modify your HOSTS file. To make your HOSTS file read-only:

1) Right-click on the HOSTS file
2) Click Properties
3) You will see a window open. Look at the bottom of the window. To the right of Attributes, check the box that says Read-only.
4) Click Apply/OK.

Note: When your HOSTS file is read-only, you cannot make any changes to it (setting it to read-only helps in preventing modifications to the file), so if you want to add a new entry to your HOSTS file later on, you'll have to uncheck the Read-only box before you edit; you can then set it back to read-only when you're finished.