Author Archives: Gkhan

How to troubleshoot CallerID issues on a FXO

How to troubleshoot CallerID issues on a FXO The Digium® X100M FXO module and X400M FXO module are daughter cards that allow Digium® analog cards to terminate analog telephone lines (POTS). This document is intended to be a brief description … Continue reading

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How to change VCenter Server 5.5 Appliance IP address CLI

How to change VCenter Server 5.5 Appliance IP address CLI Open a console session of the VCSA  Login as: root Default password is: vmware Execute the following command  /opt/vmware/share/vami/vami_config_net Now you will get the option to change the network setting. … Continue reading

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CCIE RS LAB config mistake BGP neighbor not coming up

CCIE RS LAB  config mistake BGP neighbor not coming up While I was configuring BGP neighbors it was not coming up . What I did mistake

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How to check tftp events in Elastix

How to check tftp events in Elastix you can check tftp events requested by Cisco Phones by the following command . tail -f   /var/log/messages this is show you the request and response by served by tftp server on Elastix … Continue reading

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Elastix OpenVPN Configuration

Elastix  OpenVPN Configuration I have taken a scenario of Elastix PBX install on two geographical location  connecting over OpenVpn and working as a VPN server and client. As we want to use OPENVPN for data and voice connectivity for both … Continue reading

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Cisco UCS KVM The Virtual Media program will close

Cisco UCS KVM The Virtual Media program will close I was trying to mount ISO image on Cisco UCS KVM ,when I clicked on Virtual Media tab I got the following Error . I googled it and got solution remove … Continue reading

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Backup VOS3000 CDR database

Backup VOS3000 CDR database CDR data maybe very large, about 73G/year/1000cc the backup is slowly,vos3000 user should depend this by yourself There are two methods to do this 1)You should stop mbx3000d,vos3000d,mysql services before taking backup   /bin/tar -jcvf /home/kunshi/vos3000/databackup/vos3000cdr.tar.bz2 … Continue reading

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VOS3000 Switch Firewall rules

VOS3000 Switch  Firewall rules If you are running you VOS3000 server behind the firewall then you need to allow the following ports on your firewall. tcp port: vos-client: 1202 web: 8080 H323: 1719 1720 3719 3720 H245: 10000-39999 UDP port: … Continue reading

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How to Add the sip register port in VOS3000 2.1.4.0

How to  Add the sip register port in VOS3000 2.1.4.0 Vos3000 sip default port is 5060 and 6060 The rc4 is 5070(the encryption is defined by linknat.com) You can modify the mbx3000 config file to add the register port by … Continue reading

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fail2ban missing whois program

fail2ban missing whois program missing whois program in fail2ban email alerts . you are not able to receive IP information . #yum search whois gnome-nettool.x86_64 : A GNOME interface for various networking tools jwhois.x86_64 : Internet whois/nicname client. perl-Net-Whois.noarch : … Continue reading

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