Console via browser is very slow

System version
NethServer release 7.6.1810 (final)
Kernel release

not install module

The system has just been installed, the console via browser is very slow and often goes into “connection timed out; no servers could be reached”

please help me

Do you use Firefox? If not, please try it. I have the same issue with SOGo Interface, IE very slow, Firefox is OK.

I tried with all the browsers,
I found that by changing the DNS from to the GUI navigation improves.

Strange, very strange, give me some info ???

I’ve just an idea. Is your domainname also a public one? This could be a problem.

Please give us some infos about your configuration.

sorry what do you mean by domain name?
I think there is some query or control that tries to do to the outside that does not answer.
The same configuration with the 7.5 version works fine.

The box i clear, nothing is installed.
The problem manifests immediately after installation
I have also tried to update but the problem is not resolved


please help me

You might use browser’s developer tools to see network requests.
Also check httpd-admin logs.

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I mean something like the following
If your domain name is something like for example, the Google DNS finds also an entry for the domain and tries to redirect to it.

400 - Bad Request
;; connection timed out; no servers could be reached

  1. i see browser’s developer tools to see network requests, but I do not see anything unusual
  2. the domain name is registered on DNS and revers DNS and i vahe the https lets encrypted ok.

Please help me.


NethServer release 7.6.1810 (final)
Hyper-v windows server 2012 R2

I solved the problems slowness and reachability via browser and ssh with the installation of LIS 4.2.8

now what happens? can I continue to update from the software center if other updates come out?

What is LIS and why did it solve your issue on a standard NS7 server please?

without LIS ( no connection no fun (at least on my HyperV16).

To Install LIS 4.2.8 download the ISO from MS and attached it as CDROM to the NS virtual maschine and mount it after boot.
mount /dev/cdrom /media
cd /media

In case you already have an old version installed then remove it from NS.

Update to the latest kernel 3.10.0-957.1.3 and reboot to ensure the kernel is active.

In case you can not ssh into NS anymore then use Hyper-V Manager and connect from there to the NS virtual machine.

Mount CDROM/iso again.

reboot (and detach cdrom).

You should be done.

I will no longer update the kernel from the software center since it most probably will damage the system until the corresponding LIS package is available.

May be the developers @dev_team can add a checkbox so that we can deselect the update of the kernel.

You can try to exclude kernel updates manually by creating a template-custom with exclude=kernel*

echo exclude=kernel* > /etc/e-smith/templates-custom/etc/yum.conf/15excludekernelupdates
expand-template /etc/yum.conf

But be aware, that this disables kernel-updates permanently.
To enbale them again, you have to delete the “kernel*” and do the expand-template command again and vice versa.

What do you think @giacomo ? To risky??

(see also

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The solution should work but it’s really a bad bad bad idea.
@gperna if you have troubles with the latest kernel, please bear mind that you can boot the machine with old one: this why there are multiple kernels installed.

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