Ceyhun KIRMIZITAS – Page 9 – Cloud Solution Architect at Microsoft

15Mar 2019 by Ceyhun Kirmizitas No Comments

How to Install IBM x3850 X5 Intel 82576 and 82580 Gigabit Ethernet Controller on VMware ESXi 4x and ESX 4x

vSphere

The IBM x3850 X5 server is a nice machine. This particular IBM x3850 X5 came with IBM I340-T4 Network Adapters, however they weren't being detected by VMware ESXi 4x. The NICs are supported by vmware but drivers aren't included by default on the ESXi media. You need to manually download the driver packages from VMWare, and inject the driver into ESXi/ESX in order to utilize the NICs. These NICs can be ordered with any IBM System x Server, so you can run into this issue on anything from an IBM x3250 through to an IBM x3950. Driver Install Process: 1- Download the ESX/ESXi 4.x Driver CD for Intel 82576 and 82580 Gigabit Ethernet Controller. Then, mount the ISO, extract the driver bundle from the " offline-bundle " folder. 2- Upload " INT-intel-lad-ddk-igb-2.1.10.2-offline_bundle-268793.zip…

15Mar 2019 by Ceyhun Kirmizitas No Comments

How to Enable SSL Support for VSFTPD – RHEL 6 – CentOS 6

Red Hat - CentOS - Fedora, Video Tutorials

FTP, or file transfer protocol, was a popular way to transfer files between local and remote computers in the past. Traditional FTP is rather insecure. When you login, your username and password are transmitted in clear text, raising the possibility of your credentials being sniffed. If you still want to use FTP instead of a more secure alternative like SFTP, which uses the SSH protocol to implement file transfers, you can secure it somewhat by configuring FTP to use SSL. You can quite easily configure your vsftpd server to use OpenSSL encryption, so that usernames & password, and even data files, are encrypted during transfer. It takes just a few simple steps. Steps: 1. Check whether the latest mod_ssl installed locate mod_ssl 2. Install the latest mod_ssl via yum yum…

14Mar 2019 by Ceyhun Kirmizitas No Comments

Common Network Utilities in Linux

Linux

Computers are connected in a network to exchange information or resources each other. Maintaining of system and network up and running is an essentials task of System or Network Administrator’s job. In this tutorial, I will explain various tools which can be useful when networking with other computers both within the network and across the internet, obtaining more information about other computers. ping - Determine if remote host is up/available telnet - Determine if local/remote service is available netstat - Shows network connections, routing tables, interface statistics netstat -a - dumps ALL sockets with: service/port and hostname resolution netstat -an - same as above, but suppresses name resolution netstat -ntl - suppresses name resolution, shows all TCP and listeners netstat -ntlp - same as above, includes programs bound to ports netstat…

14Mar 2019 by Ceyhun Kirmizitas No Comments

multiextent loaded successfully – Long Time to Boot ESX/ESXi 4.x hosts with passive MSCS nodes with RDM

VMware

You might experience significant delays while booting your ESX/ESXi 4.x hosts that have passive MSCS nodes with RDM LUNs on a SAN. This could be because conflicts between the LUN SCSI reservations. For ESX and ESXi 4.1 hosts To resolve this issue in ESX/ESXi 4.1 hosts, you must modify the Scsi.CRTimeoutDuringBoot parameter from the GUI. To modify the Scsi.CRTimeoutDuringBoot parameter: Go to Host > Configuration > Advanced Settings. Select SCSI. Change the Scsi.CRTimeoutDuringBoot value to 1. For ESX and ESXi 4.0 hosts The Scsi.UWConflictRetries parameter for ESX/ESXi 4 Update 1 hosts have a default value of 1000. This increases the time spent enumerating LUN and VMFS volumes. To resolve this issue and to speed up the boot process, modify this value to 80. To modify the Scsi.UWConflictRetries parameter from the…

13Mar 2019 by Ceyhun Kirmizitas No Comments

Installing Arch Linux 2013.05.01 + Xfce 4.10 in VMware Workstation 9

Linux, Video Tutorials

What is Arch Linux? Arch Linux is an independently developed general purpose GNU/Linux distribution. Development focuses on simplicity, minimalism. Arch Linux was founded by Canadian programmer Judd Vinet. Its first formal release, Arch Linux 0.1, was on March 11, 2002. Although Arch is completely independent, it draws inspiration from the simplicity of other distributions including Slackware, CRUX and BSD. Arch Linux is one of my favorite GNU/Linux distributions, however it is not as easy to install as are other Linux distributions. Related Video: https://www.youtube.com/watch?v=8ILPjsZvs8Y Hope you found it informative and useful. Any questions or comments are welcomed.

13Mar 2019 by Ceyhun Kirmizitas No Comments

How to Perform Windows Server 2008 Complete Server Backup and Restore

Video Tutorials

Windows Server 2008 contains new and updated features to help you create backups and, if needed, perform a recovery of your operating system, applications, and data. You can recover your server operating system or full server by using Windows Recovery Environment and a backup that you created earlier with Windows Server Backup. Using the Windows Recovery Environment on Windows Server 2008 you can perform a bare-metal restore to recover your server operating system or the entire server itself. An operating system restore will only recover critical drive volumes that contain system components. If you would like to restore all volumes, you will need to conduct a full server recovery.

12Mar 2019 by Ceyhun Kirmizitas No Comments

How to Perform Step by Step Exchange 2010 Single Mailbox Item Restore with Windows Server Backup

Exchange Server, Video Tutorials

Exchange Server 2010 no longer has the notion of Storage Groups, which were used in Exchange 2007 and 2003 to contain logical groupings of databases. Exchange 2010 now simply lets you create databases on mailbox servers. The difference is that in Exchange 2003/2007, you created a Recover Storage Group (RSG) to restore the database into. In Exchange 2010, you simply restore the database and connect to it as a Recovery Database (RDB). While the main purpose of Exchange backup is to enable server, storage, and datacenter disaster recovery scenarios, a common and routine request of Exchange admins is to restore an individual mailbox. Microsoft does not provide a native and fully automated way to granularly restore a single mailbox from an Exchange database backup. In this video I'll demonstrate the…

12Mar 2019 by Ceyhun Kirmizitas No Comments

Event ID: 16 Client Access server failed to proxy Exchange Web Services to Active Directory site

Exchange Server

Log Name: Application Source: MSExchange Web Services Event ID: 16 Task Category: Core Level: Error Keywords: Classic User: N/A Description: Client Access server Internet-Facing-CAS-Name failed to proxy Exchange Web Services to Active Directory site CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=yourdomain,DC=tld because there are no applicable Client Access servers in the destination site. Please check the configuration of the servers in site [No Server]. If you have an Exchange Server 2010 infrastructure that contains more than 1 Client Access Server (CAS) with 1 Internet facing and the rest are not, then you may see this error message in application log in Internet Facing CAS server. The problem is that the Internet Facing CAS proxies the request for Exchange Web Services (EWS) to the Non-Internet facing CAS. It is failing because the servers are not trusting the…

11Mar 2019 by Ceyhun Kirmizitas No Comments

VMware vSphere 5 features a new ESXi firewall

VMware

VMware vSphere 5 features a new ESXi firewall that you can configure though the vSphere Client or command line. The addition brings a feature to ESXi 5 that was previously found only in the recently discontinued ESX hypervisor. VMware argued that ESXi didn't require a firewall, because the lightweight hypervisor had hardly any services or ports open, leaving it with almost nothing to attack. I believe VMware added a firewall to ESXi 5 for few reasons. With a firewall, ESXi 5 isn't missing a notable feature found in the old ESX Server. Also, a firewall signals to customers and partners that VMware is committed to security. And finally, vSphere 5 is just as secure as before, if not more so. Five things to know about the ESXi 5 firewall It?s…

11Mar 2019 by Ceyhun Kirmizitas No Comments

SSH Connection: Wait long after entering username – ssh password prompt delay

Linux

When I make ssh connection I get long wait just after entering username. It's most likely that ssh daemon is set up to do a DNS reverse-lookup on the host that's connecting. So, sshd try to find reverse DNS record for a while before prompting you password. If you do not want to wait, you can either add your client's ip and hostname information to /etc/hosts file on linux or you can disable reverse dns lookup in /etc/ssh/sshd_config 1- Open your terminal window 2- Edit /etc/ssh/sshd_config 3- Add UseDNS no at the end 4- Restart your ssh daemon