Sajjan's Blog

Category: Technology

  • Backup/Restore Zimbra LDAP for DR

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    sajjanbh
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    Overview In this post, I’m going to cover the topic on how to backup and restore LDAP database and config in case of disaster. If you’re a Zimbra administrator, this is a must have knowledge. This can be useful for anyone with an interest in system administration and mail servers. The reason I’m writing this…

  • Route Based IPSec VPN in JunOS

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    sajjanbh
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    In this blog, I’m going to cover how to setup a Route based IPSec VPN in Juniper Networks’ JunOS. I hope you’ve read my previous blog which was about configuring Policy based IPSec VPN in JunOS. In case you haven’t, you can find it here: Policy Based IPSec VPN in JunOS The reason I’m mentioning about the…

  • Policy Based IPSec VPN Junos

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    sajjanbh
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    Hello! I’m going to dedicate this post to talk about Policy Based IPSec VPN in Juniper Networks device. For the purpose of setting up IPSec VPN, I’ve prepared a lab in GNS3 using three vSRX machines, one Cisco 2691 router and three Cirros machines. However, for now, I’ll be using only two vSRX devices for policy based VPN…

  • Setup Zimbra Mail Server-Post Installation

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    sajjanbh
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    Welcome back! If you’ve been following up with my previous blogs, it is a continuity to my last blog on how to setup Zimbra mail server in CentOS. Till now, I’ve already covered the preparation and installation of ZCS package. From here, I’ll get into the post-installation part for our mail server setup. Changing SSH…

  • Setup Zimbra Mail Server in CentOS

    Setup Zimbra Mail Server in CentOS

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    sajjanbh
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    Hello and welcome back to my next blog! In this post, I’m going to share how to setup Zimbra Mail Server in CentOS server. Since I’m going to cover this topic from start to end, it might be a long read and I hope you’ll manage to go through it. Just to give you a…

  • Getting Started With Juniper vSRX

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    sajjanbh
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    My objective here is to perform the basic configuration in a vSRX machine to provide Intenet access for its users sitting inside the local area network. For that purpose, I’m setting up DHCP, DNS, Default Route, Zones, Policies, and Source NAT in this virtual appliance. To get started, I designed a network topology in GNS3…

  • Running vSRX Within GNS3 In Ubuntu

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    sajjanbh
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    Hello and welcome back! In this blog, I’m going to cover a little different topic than my previous ones. This time, it’s about setting up Juniper‘s vSRX within GNS3 in Ubuntu. To briefly introduce the involved subjects; vSRX is the virtual firewall appliance made by Juniper Networks, GNS3 is the best open-source network simulation software…

  • NFS Sharing Between CentOS Servers

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    sajjanbh
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    In this blog, I’m going to describe how we can share folders between CentOS servers using Network File System (NFS). For this purpose, I’m setting up two CentOS 6.5 Minimal servers named as CentOS-1 and CentOS-2. The IP addresses of CentOS-1 and CentOS-2 are 172.16.5.5 and 172.16.5.6 respectively. I’m going to create a folder in…

  • How To Restore Zimbra When LDAP DB Is Corrupted

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    sajjanbh
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    A week ago, I received a call from one of our clients to whom we provide system and networking support. They had called me to inform that their Zimbra server had stopped working after an unexpected power outage. So, I asked them to provide me a remote access to their server so that I could analyze…

  • Custom Disk Partitioning in CentOS

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    sajjanbh
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    Here, I’m going to explain how we can perform custom disk partitioning while installing a CentOS system. This is a continuity to my earlier blog in which I wrote about the installation of CentOS 6.5 Minimal system. If you haven’t read my previous blog and want to know from where I’m continuing this blog, please…