Issue when going into RDP session

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Issue when going into RDP session

aschappell
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Hey all, it just started happening the other day, not sure if the customer started a new proxy or what but it always used to work. Anyways this is the error we are getting when on site.....

The connection has been closed because the server is taking too long to respond. This is usually caused by network problems, such as a spotty wireless signal, or slow network speeds. Please check your network connection and try again or contact your system administrator.

Reconnecting in 15 seconds...

It is guac 0.9.9. Is there anyway to work around this or any suggestion anyone has? It works perfectly fine when on other networks.
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Re: Issue when going into RDP session

aschappell
Anyone out there?
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Re: Issue when going into RDP session

Mike Jumper
Can you resend your original question?

As this latest email made it through, I assume you're now subscribed,
but this is the first email in the thread which has been received.
From the perspective of anyone on the user@ mailing list, your latest
email has no context.

Thanks,

- Mike


On Mon, Dec 12, 2016 at 9:58 AM, aschappell <[hidden email]> wrote:
> Anyone out there?
>
>
>
> --
> View this message in context: http://apache-guacamole-incubating-users.2363388.n4.nabble.com/Issue-when-going-into-RDP-session-tp89p128.html
> Sent from the Apache Guacamole (incubating) - Users mailing list archive at Nabble.com.
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Re: Issue when going into RDP session

aschappell
This post was updated on .
Hey Mike,

Yeah I think you are right.

Here is my previous question.

Hey all, it just started happening the other day, not sure if the customer started a new proxy or what but it always used to work. Anyways this is the error we are getting when on site.....

The connection has been closed because the server is taking too long to respond. This is usually caused by network problems, such as a spotty wireless signal, or slow network speeds. Please check your network connection and try again or contact your system administrator.

Reconnecting in 15 seconds...

It is guac 0.9.9. Is there anyway to work around this or any suggestion anyone has? It works perfectly fine when on other networks.
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Re: Issue when going into RDP session

Mike Jumper
On Mon, Dec 12, 2016 at 10:51 AM, aschappell <[hidden email]> wrote:

> Hey Mike,
>
> Yeah I think you are write.
>
> Here is my previous question.
>
> Hey all, it just started happening the other day, not sure if the customer
> started a new proxy or what but it always used to work. Anyways this is the
> error we are getting when on site.....
>
> The connection has been closed because the server is taking too long to
> respond. This is usually caused by network problems, such as a spotty
> wireless signal, or slow network speeds. Please check your network
> connection and try again or contact your system administrator.
>
> Reconnecting in 15 seconds...
>
> It is guac 0.9.9. Is there anyway to work around this or any suggestion
> anyone has? It works perfectly fine when on other networks.
>

This does sound like a proxy is involved. If a proxy sits between the
browser and the Guacamole server, and that proxy buffers data until
the connection is closed, then the proxy will prevent Guacamole from
working by effectively blocking communication until the connection
times out.

Setting up proper SSL/TLS will often solve issues with proxies. If you
haven't done this, you can maybe kill two birds with one stone by
doing so now.

If you can confirm with your user whether there is indeed a new proxy
involved, that would be a good first step. You should also check
whether virus scanning software has recently been installed with
features which might involve acting as a proxy (ie: automatic scanning
of all downloads), as such things would interfere in the same way.

- Mike
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Re: Issue when going into RDP session

aschappell
Actually I know for a fact they are going through a proxy but there no way of getting information about that proxy. Is there any way to turn off "ssl" and just allow proxies since i do not have any information on it?
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Re: Issue when going into RDP session

Mike Jumper
On Mon, Dec 12, 2016 at 12:39 PM, aschappell <[hidden email]> wrote:
> Actually I know for a fact they are going through a proxy but there no way of
> getting information about that proxy. Is there any way to turn off "ssl"

You don't want to turn SSL off - you want to turn it *on* (assuming it
isn't already). There is documentation in the manual for doing this.
We recommend using a reverse proxy like Apache or Nginx:

http://guacamole.incubator.apache.org/doc/gug/proxying-guacamole.html

>  and just allow proxies since i do not have any information on it?
>

It's not that Guacamole doesn't "allow" proxies, or that there is some
configuration setting which would make proxies suddenly work. The
issue is that web proxies often assume that web traffic is
non-interactive, and that it is thus safe to buffer the entire HTTP
stream until the connection is closed. This assumption fails for
Guacamole, because it is very much interactive, and buffering the
connection in that manner means the data simply never reaches the
user.

If you set up SSL in front of Guacamole, then there is a good chance
the proxy will pass that through untouched. Proxies generally have to
pass SSL traffic through unbuffered and unmodified, as doing otherwise
prevents SSL from working. Some corporate proxies are exceptions to
this, but if you don't have SSL set up yet, it's really worth trying.
You absolutely should be encrypting your Guacamole traffic, and if it
happens to solve your issue with the proxy, so much the better.

- Mike
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Re: Issue when going into RDP session

aschappell
Would this be generating an error in the logs? Where is the log that I could check to see this?
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Re: Issue when going into RDP session

Mike Jumper
On Dec 13, 2016 08:17, "aschappell" <[hidden email]> wrote:
Would this be generating an error in the logs? Where is the log that I could
check to see this?

Would what be generating an error?

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Re: Issue when going into RDP session

aschappell
When a user try's to login to the rdp session and it keeps timing out. will that generate at error or tell you anything?