Gkhan Tips

How to check your port forwarding is work

go to this website and you can check .

https://www.yougetsignal.com/tools/open-ports/

How to find VMware supported Hardware

VMware has provided search option to check hardware combability. you can check on below link .

https://www.vmware.com/resources/compatibility/search.php

How to setup your IT Infrastructure for Work From Home

How to setup your IT Infrastructure for Work From Home in low cost with open source secure industry standard technologies.

Here I am going to talk about talk about small and medium size offices and companies who are not able to invest big amount to upgrade or migrate there IT infrastructure for there workers to work from home in the COVID pandemic .

There are few things mostly you are using in the office as IT infrastructure as end user. if that IT infrastructure is available at your home then mostly people can work from home easily.

I am taking a small office example scenario with 30 employees which you require to work from home.

Simple small office network diagram .

Continue reading How to setup your IT Infrastructure for Work From Home

How to Restart Management agents in ESXi Using ESXi Shell or Secure Shell (SSH)

How to Restart Management agents in ESXi Using ESXi Shell or Secure Shell (SSH).

Restart the ESXi host daemon and vCenter Agent services using these commands:

/etc/init.d/hostd restart

/etc/init.d/vpxa restart

To reset the management network on a specific VMkernel interface, by default vmk0, run the command:esxcli network ip interface set -e false -i vmk0; esxcli network ip interface set -e true -i vmk0
Note: Using a semicolon (;) between the two commands ensures the VMkernel interface is disabled and then re-enabled in succession. If the management interface is not running on vmk0, change the above command according to the VMkernel interface used.
To restart all management agents on the host, run the command:services.sh restart
original link

how to restart vmware esxi Network adapter

check the network interfaces by following command .

# esxcli network nic list

----To  down your interface -----

# esxcli network nic down -n vmnicX                 X   replace X with your nic number

---To  make interface UP ---

# esxcli network nic up -n vmnicX

How to enable call forwarding from SIP extension Softphone or Analog Phone

How to enable call forwarding from SIP extension Softphone or Analog Phone if you are using Asterisk PBX or Issabel PBX .

From the Softphone or Analog Phone

Dial *72 with number where you want to forward the call for example I want to forward my all calls on

my mobile no 83199999 then i will dial *7283199999 make sure you are able to dial outside from your phone . and add prefix which you dial for outside calls.

To Disable Call Forwarding

Dial *73

MikroTik DHCP Server configuration for multiple Networks

If you are having multiple Network and want to configure DHCP server for your Networks .

Follow the steps and change the IP Address and Interface names according to your requirement.

Here I will configure two networks for my home

1- 172.16.10.0/24 for my LAB

2- 10.34.200.0/24 for my Home

My Interfaces IP address

/ip address
add address=172.16.10.1/24 interface=ether2_lab network=172.16.10.0
add address=10.34.200.1/24 interface=ether3_home network=10.34.200.0

1- Create IP Pools for your Network

/ip pool
add name=lab ranges=172.16.10.100-172.16.10.150
add name=home ranges=10.34.200.100-10.34.200.150
add name=PPTP ranges=172.16.11.100-172.16.11.150

2- Create DHCP Server

/ip dhcp-server
add address-pool=lab disabled=no interface=ether2_lab name=dhcp1
add address-pool=home disabled=no interface=ether3_home name=server1

3- Create DHCP-Server Network

/ip dhcp-server network
add address=10.34.200.0/24 gateway=10.34.200.1
add address=172.16.10.0/24 gateway=172.16.10.1

how to configure sip trunk between cme and issabel

how to configure sip trunk between cme and issabel or how to configure sip trunk between cme and elastix.

Some time we require sip communication between Cisco CME and Asterisk servers to send and receive calls to and from CME to Asterisk .

First we will configure Issabel side with following steps. we will go through following steps .

1- Configure Trunk

2- Configure Outbound Routes

3-Inbound Routes

Continue reading how to configure sip trunk between cme and issabel

centos 5.11 yum repository

It is now EOD no updates available. but we require yum repo to install old applications .

go to and run

cd /etc/yum.repos.d
for i in $(ls *.repo); do mv $i $i.orig; done

copy the below code and save as CentOS-Base.repo

# CentOS-Base.repo
#
# The mirror system uses the connecting IP address of the client and the
# update status of each mirror to pick mirrors that are updated to and
# geographically close to the client.  You should use this for CentOS updates
# unless you are manually picking other mirrors.
#
# If the mirrorlist= does not work for you, as a fall back you can try the 
# remarked out baseurl= line instead.
#
#

[base]
name=CentOS-$releasever - Base
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os
baseurl=http://vault.centos.org/5.11/os/$basearch
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5

#released updates 
[updates]
name=CentOS-$releasever - Updates
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates
baseurl=http://vault.centos.org/5.11/updates/$basearch
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5

#packages used/produced in the build but not released
[addons]
name=CentOS-$releasever - Addons
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=addons
baseurl=http://vault.centos.org/5.11/addons/$basearch
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5

#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras
baseurl=http://vault.centos.org/5.11/extras/$basearch
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5

#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus
baseurl=http://vault.centos.org/5.11/centosplus/$basearch
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5

#contrib - packages by Centos Users
[contrib]
name=CentOS-$releasever - Contrib
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=contrib
baseurl=http://vault.centos.org/5.11/contrib/$basearch
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5

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How to check Internet Speed on Centos CLI

Speedtest-cli is Python script its works on Python program.

you must have Python installed. check if have installed .

python –version
python3 –version
lsb_release -a

if you have not install then install it by

# yum install python

Download the script

#wget -O speedtest-cli https://raw.githubusercontent.com/sivel/speedtest-cli/master/speedtest.py

#chmod +x speedtest-cli

Now check the internet speed

#./speedtest-cli

#python speedtest-cli

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