How to configure Mikrotik DHCP Server for Cisco Phone TFTP option
1- Change your TFTP server IP in to hex code
you can use this online tool : http://www.miniwebtool.com/ip-address-to-hex-converter/
2- Now configure Mikrotik RouterOS :
/ip dhcp-server option add code=150 name=ciscotftp value=0xC0A80307
Continue reading How to configure Mikrotik DHCP Server for Cisco Phone TFTP option
How to install VMware tools in Linux Virtual Machine
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VERIFY ERROR: depth=0, error=CRL has expired: CN=servername
In order to fix the issue, we just need to recreate the crl.pem file.
we need to backup the current crl.pem file before creating a new one.
The location of the crl.pem file at /etc/openvpn/
#mv crl.pem crl.pem.back
Now go to easy-rsa folder
# cd easy-rsa
now generate crl.pem
# ./easyrsa gen–crl
Now copy the new crl.pem to openvpn folder
# cp –pr /etc/openvpn/easy–rsa/pki/crl.pem
Now restart openvpn service
source link :- https://www.jobishmathew.me/openvpn-crl-has-expired/
OPENVPN Logs
To troubleshoot connection issues check below logs
grep the client name in /var/log/messages
# grep VPN /var/log/messages
Check the connection time
#cat /etc/openvpn/openvpn-status.log
Check the connection negotiation activity
# tail -f /var/log/messages
How to install vos3000 2.1.4.0 on CentOS 6.X
Follow the steps
#/etc/init.d/iptables save
#/etc/init.d/iptables stop
#chkconfig iptables off
#/etc/init.d/ip6tables save
#/etc/init.d/ip6tables stop
#chkconfig ip6tables off
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VMware OS Optimization Tool
The VMware OS Optimization Tool helps optimize Windows 7/8/2008/2012/10 systems for use with VMware Horizon View. The optimization tool includes customizable templates to enable or disable Windows system services and features, per VMware recommendations and best practices, across multiple systems. Since most Windows system services are enabled by default, the optimization tool can be used to easily disable unnecessary services and features to improve performance.
You can perform the following actions using the VMware OS Optimization Tool:
Download latest VMware OS Optimization Tool
SSH Login Email Alerts
The examples below send an email when someone logs into your server. For this to work, your server must be able to send mail using the mail command.
Open the file ~/.bash_profile in a text editor.
Append the following lines:
IP="$(echo $SSH_CONNECTION | cut -d " " -f 1)"
HOSTNAME=$(hostname)
NOW=$(date +"%e %b %Y, %a %r")
echo 'Someone from '$IP' logged into '$HOSTNAME' on '$NOW'.' | mail -s 'SSH Login Notification' YOUR_EMAIL_ADDRESSiptables port forwarding
I am port forwarding public ip x.x.x.x to private ip 192.168.200.200 .
iptables -A INPUT -i eth0 -p tcp –dport 5001 -m state –state NEW,ESTABLISHED -j ACCEPT
iptables -A OUTPUT -o eth0 -p tcp –sport 5001 -m state –state ESTABLISHED -j ACCEPT
iptables -t nat -A PREROUTING -i eth0 -p tcp -m tcp –dport 5001 -j DNAT –to-destination 192.168.200.200:5001
How to configure Cisco Unity Connection with CUCM with SCCP
I will be configuring very simple way without CSS and Partition with Default Basic Configuration.
Below are the Call flow From CUCM and Cisco Unity Connection.
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How to configure UCCX Simple Auto Attendant
I am going to configure UCCX and CUCM for simple Auto Attendant using inbuilt script (aa.aef) in Cisco UCCX. I am not making any restriction so I am not using CSS and Partition to make it very simple .
we need to go through following steps .
Before going above steps UCCX basic configuration should be done as AXL, JTAPI and RMCM integration. As it is the POST UCCX configuration after installation .
Continue reading How to configure UCCX Simple Auto Attendant