Changes to /etc/hosts are Wiped out after Reboot

No, there's nothing that will change the hosts file, as far as I know. I can't replicate this problem. I've got a huge list of sites that I sometimes add to my hosts file so they redirect to the local machine 127.0.0.1. I've just done this and then rebooted; nothing changed it back; the file we as I saved it.

I suggest you save it again, then reboot, then check it again. Maybe look at the time stamp on the file and see exactly _when_ it was saved. Since the file is owned by root, there cant' be too many things messing with it.

Chris

Hello Chris,

Thank you for the response. I am not in a position to test again (I will
try again tonight), but I made my changes twice yesterday and both times
after a reboot things were wiped out except for the orginal values in the
file. I will confirm the timestamp and all but I am fairly confident that
something wiped out the file.

I was reading that (as of 12.04), DNS is handled differently, but I haven't
seen much explaining what the differences are. This is a fresh install of
12.04 versus an upgrade, not sure if that makes a difference.

Neal
On Mar 19, 2012 5:10 AM, "Chris" <email address hidden>
wrote:

> Your question #191063 on Ubuntu changed:
> https://answers.launchpad.net/ubuntu/+question/191063
>
> Status: Open => Answered
>
> Chris proposed the following answer:
> No, there's nothing that will change the hosts file, as far as I know.
> I can't replicate this problem. I've got a huge list of sites that I
> sometimes add to my hosts file so they redirect to the local machine
> 127.0.0.1. I've just done this and then rebooted; nothing changed it
> back; the file we as I saved it.
>
> I suggest you save it again, then reboot, then check it again. Maybe
> look at the time stamp on the file and see exactly _when_ it was saved.
> Since the file is owned by root, there cant' be too many things messing
> with it.
>
> Chris
>
> --
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>
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> following page to enter your feedback:
> https://answers.launchpad.net/ubuntu/+question/191063
>
> You received this question notification because you asked the question.
>

It could be a regression of this bug: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/659872

Hello Dave,

Yes, I believe you are correct, this sounds a lot like my issue as the
entries I put in are mostly 127.*.*.* ...that being said, not all of my
entries that were removed are 127 entries. But it does sound like a similar
issue to what I am seeing.

Thank you for the reply. Hopefully there is a simple solution to this
problem. I won't be able to play with things until tonight.

Neal
On Mar 19, 2012 10:05 AM, "Dave Lentz" <email address hidden>
wrote:

> Your question #191063 on Ubuntu changed:
> https://answers.launchpad.net/ubuntu/+question/191063
>
> Dave Lentz posted a new comment:
> It could be a regression of this bug:
> https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/659872
>
> --
> You received this question notification because you asked the question.
>

It's due to dnsmasq defaulting to sys dns settings.
http://www.stgraber.org/2012/02/24/dns-in-ubuntu-12-04/#comment-39367

http://wiki.debian.org/HowTo/dnsmasq

Hello Sam,

Thank you for the links. It does appear that dnsnasq is probably what is causing my issue. However, is it fair to say there is currently no work-around to this issue? We just need to wait for the fix? Do I need to convert this to an official bug? I would assume this issue will affect a fairly large number of people if it goes out in the official release :-)

I am very happy with 12.04, this is one of the last issues I find to be a major one. Thanks again to everyone.

In order to provide some more info to developers please run in a terminal:
ubuntu-bug network-manager

After running over 130+ updates this morning, it appears someone already squished this bug. I am no longer seeing my /etc/hosts getting overwritten after a reboot. I will continue to monitor, but it appears someone fixed their bug. I thank everyone for the feedback.

I have discovered that the cause of this is my companies Juniper Network Connect VPN software. Any changes you make to /etc/hosts or /ets/resolv.conf during the VPN session are wiped out when you disconnect from the VPN. I just wanted to add these details in case someone else had this same issue.

Good thinking Neal !
You caught me with you last comment ! Thank you !

To continue the VPN agent theme - Cisco AnyConnect did the same thing for me with this version:

Cisco Systems VPN Agent (version 2.5.3055 )

It wipes out all static/maintained entries. I'm not aware of a workaround, but I wasn't using it anymore, so removed it. There are later versions available from Cisco, so these might be worth a try.