You are viewing a plain text version of this content. The canonical link for it is here.
Posted to user@guacamole.apache.org by benchu yao <ya...@gmail.com> on 2020/02/24 05:49:29 UTC
Question about connecting centos through rdp and vnc
Install xrdp and vncserver on centos7, and then use the rdp or vnc protocol
to connect remotely many times,after that the centos server login becomes
difficult.
It used to take 2s to log in successfully through the ssh protocol, but now
it may take 60s. The rdp and vnc protocols can no longer be used, and often
need to restart the virtual machine to resolve
When I say that I have logged in to the centos7 system through the rdp and
vnc protocols many times, it means no more than 50 times, maybe only 20
times, and each time does not exceed half an hour.
Of course, I connected via guacamole
I want to ask if you have such a problem. Is it a problem with my operating
system?
Re: Question about connecting centos through rdp and vnc
Posted by ivanmarcus <iv...@yahoo.com.INVALID>.
Do you mean on the Guacamole server?
If so the Guacamole manual lays it out:
https://guacamole.apache.org/doc/gug/ - Chapt 2 in particular.
In case it's of any interest I posted an install procedure for Guacamole
1.1.0 on a fresh Ubuntu 18.04 load. I realise it's not CENTOS (sorry),
but it'd be reasonably easy to spin up a VM and test... Although I've
not tried it with VNC it should work, however it works fine with RDP to
Winboxen and exhibits none of the issues you mention. I can't comment on
connections to XRDP, I've never tried it:
http://apache-guacamole-general-user-mailing-list.2363388.n4.nabble.com/ANNOUNCE-Apache-Guacamole-1-1-0-td7127.html
In general use over the past two or three years I've not had any issues
at all, except for one related to RAM. I see others have commented
similarly and I would concur that increasing RAM allocation may assist.
I have 2Gb allocated to my VM's, this serves a total of ~60 users well,
with a max of 5-9 concurrent connections.
On 25/02/2020 3:48 p.m., benchu yao wrote:
> What do you usually install on a linux server to support rdp and vnc
> protocols
>
> Mike Jumper <mjumper@apache.org <ma...@apache.org>>
> 于2020年2月25日周二 上午10:27写道：
>
> On Mon, Feb 24, 2020 at 5:36 PM benchu yao <yaobenchu@gmail.com
> <ma...@gmail.com>> wrote:
>
> In fact, when I only connect to linux via ssh or rdp to
> windows, there is no problem.
>
> The problem only occurs when I connect to the linux system
> through rdp or vnc. Maybe it is a problem with xrdp and
> vncserver. Maybe it is a problem with my configuration, but
> there is actually no configuration.
> I wonder if it may be that the connection has not been closed
> since the connection was opened, and it directly appears that
> the resources have not been released.
>
> I'm still looking for a solution
>
>
> I can't speak to whether XRDP might be holding on to any
> resources, but the Guacamole webapp and guacd will both
> automatically close the underlying RDP connection and release all
> related resources after you have disconnected or closed the tab.
> If network disruption occurs and the client can't signal the
> server to disconnect, the server will still automatically do so
> after the client has been unresponsive for around 15 seconds.
>
> - Mike
>
Re: Question about connecting centos through rdp and vnc
Posted by benchu yao <ya...@gmail.com>.
What do you usually install on a linux server to support rdp and vnc
protocols
Mike Jumper <mj...@apache.org> 于2020年2月25日周二 上午10:27写道：
> On Mon, Feb 24, 2020 at 5:36 PM benchu yao <ya...@gmail.com> wrote:
>
>> In fact, when I only connect to linux via ssh or rdp to windows, there is
>> no problem.
>>
>> The problem only occurs when I connect to the linux system through rdp or
>> vnc. Maybe it is a problem with xrdp and vncserver. Maybe it is a problem
>> with my configuration, but there is actually no configuration.
>> I wonder if it may be that the connection has not been closed since the
>> connection was opened, and it directly appears that the resources have not
>> been released.
>>
>> I'm still looking for a solution
>>
>
> I can't speak to whether XRDP might be holding on to any resources, but
> the Guacamole webapp and guacd will both automatically close the underlying
> RDP connection and release all related resources after you have
> disconnected or closed the tab. If network disruption occurs and the client
> can't signal the server to disconnect, the server will still automatically
> do so after the client has been unresponsive for around 15 seconds.
>
> - Mike
>
>
Re: Question about connecting centos through rdp and vnc
Posted by Mike Jumper <mj...@apache.org>.
On Mon, Feb 24, 2020 at 5:36 PM benchu yao <ya...@gmail.com> wrote:
> In fact, when I only connect to linux via ssh or rdp to windows, there is
> no problem.
>
> The problem only occurs when I connect to the linux system through rdp or
> vnc. Maybe it is a problem with xrdp and vncserver. Maybe it is a problem
> with my configuration, but there is actually no configuration.
> I wonder if it may be that the connection has not been closed since the
> connection was opened, and it directly appears that the resources have not
> been released.
>
> I'm still looking for a solution
>
I can't speak to whether XRDP might be holding on to any resources, but the
Guacamole webapp and guacd will both automatically close the underlying RDP
connection and release all related resources after you have disconnected or
closed the tab. If network disruption occurs and the client can't signal
the server to disconnect, the server will still automatically do so after
the client has been unresponsive for around 15 seconds.
- Mike
Re: Question about connecting centos through rdp and vnc
Posted by benchu yao <ya...@gmail.com>.
In fact, when I only connect to linux via ssh or rdp to windows, there is
no problem.
The problem only occurs when I connect to the linux system through rdp or
vnc. Maybe it is a problem with xrdp and vncserver. Maybe it is a problem
with my configuration, but there is actually no configuration.
I wonder if it may be that the connection has not been closed since the
connection was opened, and it directly appears that the resources have not
been released.
I'm still looking for a solution
Michael Ballard <mi...@gmail.com> 于2020年2月24日周一 下午9:32写道：
> I may have had a similar problem. After a few days/weeks, connections
> through guacamole would take a long time. I could connect directly to the
> computers via ssh or rdp just fine from a different computer in my lan.
>
> I realized RAM usage on my server hosting guacamole was very high, and it
> looked to not be directly related to guacamole processes. I restarted. And
> it's been working fine for months.
>
> My guacamole server is inside a virtual machine, this guest is also my web
> server, the host is also serving several different guests.
>
> I've monitored ram use periodically since, and it has remained at a
> reasonable level and I have not seen the problem return. I do not think it
> was a guacamole-specific issue.
>
> On Sun, Feb 23, 2020, 21:49 benchu yao <ya...@gmail.com> wrote:
>
>> Install xrdp and vncserver on centos7, and then use the rdp or vnc
>> protocol to connect remotely many times,after that the centos server login
>> becomes difficult.
>> It used to take 2s to log in successfully through the ssh protocol, but
>> now it may take 60s. The rdp and vnc protocols can no longer be used, and
>> often need to restart the virtual machine to resolve
>>
>> When I say that I have logged in to the centos7 system through the rdp
>> and vnc protocols many times, it means no more than 50 times, maybe only 20
>> times, and each time does not exceed half an hour.
>>
>> Of course, I connected via guacamole
>>
>> I want to ask if you have such a problem. Is it a problem with my
>> operating system?
>>
>
Re: Question about connecting centos through rdp and vnc
Posted by Michael Ballard <mi...@gmail.com>.
I may have had a similar problem. After a few days/weeks, connections
through guacamole would take a long time. I could connect directly to the
computers via ssh or rdp just fine from a different computer in my lan.
I realized RAM usage on my server hosting guacamole was very high, and it
looked to not be directly related to guacamole processes. I restarted. And
it's been working fine for months.
My guacamole server is inside a virtual machine, this guest is also my web
server, the host is also serving several different guests.
I've monitored ram use periodically since, and it has remained at a
reasonable level and I have not seen the problem return. I do not think it
was a guacamole-specific issue.
On Sun, Feb 23, 2020, 21:49 benchu yao <ya...@gmail.com> wrote:
> Install xrdp and vncserver on centos7, and then use the rdp or vnc
> protocol to connect remotely many times,after that the centos server login
> becomes difficult.
> It used to take 2s to log in successfully through the ssh protocol, but
> now it may take 60s. The rdp and vnc protocols can no longer be used, and
> often need to restart the virtual machine to resolve
>
> When I say that I have logged in to the centos7 system through the rdp and
> vnc protocols many times, it means no more than 50 times, maybe only 20
> times, and each time does not exceed half an hour.
>
> Of course, I connected via guacamole
>
> I want to ask if you have such a problem. Is it a problem with my
> operating system?
>