I can't do nslookup inside the virtual desktop (Sandbox).

Comodo Internet Security - CIS Defense+ / Sandbox Help - CIS
#1

Hi there community,

I am having a problem with Comodo Virtual Desktop. The problem is that the applications inside the sandbox can’t use or connect to the default 127.0.0.1:53 dns server for the system.

here is the situation:

Inside the sandbox, I run a cmd (command window) and I can:

ping any dns server on the internet or any ip address on the internet inside the sandbox including (8.8.8.8, 8.26.56.26, 8.20.247.20, 216.58.203.228).

I can do nslookup against any ip address on the internet that provides dns service, including (8.8.8.8, 8.26.56.26, 8.20.247.20, 216.58.203.228).

Now how can I use my internal dns service inside the sandbox?
(I can’t really change the global system default dns ip, under no condition. It HAS TO BE 127.0.0.1)

How can I tell the sandbox to allow access to 127.0.0.1:53 from inside the sandbox?

Is it possible to tell the sandbox, (only the sandbox) to use a different dns server to resolve this, like comodo secure dns?

#2

What OS? And is it specific to opening virtual desktop or does is also happen with any sandboxed application?

#3

It may be by design but for now you can disable filter loopback traffic in firewall advanced settings.

#4

Thank you so much futuretech for taking the time.

I am using Comodo CIS, on windows 10 1607 x64.

Also I have actually thought about disabling “Filter loopback traffic”, but I am afraid I am a very paranoid person, and I really need to know which application is doing what, even internally, including trying to do a simple lookup.

I have also tried to install a dns service indide the virtual desktop (sandbox) but it fails, giving me a message that the service is already installed. Even if I could start a new service running lets say on port 555 instead of default 53, there is no setting in the sandbox to set the default dns ip address.

#5

any ideas folks?

#6

Still no help? :-[ :-[