Ceyhun KIRMIZITAS

12Aug 2015 by Ceyhun Kirmizitas 0 Comments

Wake on LAN Stops Working After a Windows 10 Upgrade

Applies to: Windows 10 Wake on LAN (WOL) stopped working on one of my systems after upgrading from Windows 8.1 to Windows 10. The system used an onboard Realtek PCIe GBE Family Controller. In this case, the problem was the network adapter driver installed after the Windows upgrade. Replacing it with the Realtek vendor driver restored WOL. This was the finding in this specific system, not a general rule for every Windows 10 WOL problem. In This Article 1. Original Environment 2. Check the WOL Power State 3. Verify Network Adapter Settings 4. Check the Network Adapter Driver 5. What Fixed It in This System 6. Key Takeaways 1. Original Environment Previous OS: Windows 8.1 Pro x64 Current OS: Windows 10 Pro x64 Mainboard: ASUS H87-Plus NIC: Onboard Realtek PCIe…

29Jul 2013 by Ceyhun Kirmizitas 0 Comments

How to Join VMware ESXi to an Active Directory Domain

Active Directory, Identity, VMware, vSphere

Applies to: VMware ESXi 9.x / 8.x / 7.x / 6.7 / 6.5 / 6.0 / 5.5 / 5.1 VMware ESXi can use Microsoft Active Directory for direct host authentication. This lets administrators assign ESXi permissions to domain users and groups instead of maintaining separate local accounts on every host. Security note: Current VMware security guidance no longer recommends joining ESXi hosts directly to Active Directory as the default design. In centrally managed environments, prefer managing authentication and permissions through vCenter unless direct host-level AD authentication is specifically required. The original version of this article was written for ESXi 5.1. The capability still exists in current ESXi releases, but the interface and security defaults have changed. In This Article 1. Before You Join the Domain 2. Join ESXi to Active…

20Jul 2013 by Ceyhun Kirmizitas 0 Comments

How to Enable TLS for VSFTPD on RHEL-Family Linux

Linux

Applies to: RHEL-family Linux — RHEL 6–10 | Rocky Linux 8–10 | AlmaLinux 8–10 | CentOS 6–8 | CentOS Stream 8–10 Traditional FTP sends usernames, passwords, and file data without encryption. If you still need to run vsftpd, you can protect the connection with TLS and use FTPS instead of plain FTP. Current guidance: For new deployments, prefer SFTP over OpenSSH where possible. Red Hat has deprecated FTP client and server software, including vsftpd, in RHEL 10 and recommends moving new workflows to SFTP or WebDAV. FTPS and SFTP are different protocols. FTPS is FTP protected with TLS. SFTP is the SSH File Transfer Protocol and does not use vsftpd. In This Article 1. Install VSFTPD 2. Prepare the TLS Certificate 3. Configure VSFTPD for TLS 4. Restart VSFTPD 5.…

14Jul 2013 by Ceyhun Kirmizitas 0 Comments

How to Configure a Secondary BIND DNS Server on RHEL-Family Linux

Linux

Applies to: RHEL-family Linux — RHEL 6–10 | Rocky Linux 8–10 | AlmaLinux 8–10 | CentOS 6–8 | CentOS Stream 8–10 A secondary BIND DNS server keeps an authoritative copy of a DNS zone by transferring it from the primary server. If the primary DNS server is unavailable, clients can still query the secondary server for the zone. The original version of this article used the older master/slave terminology. Current BIND documentation prefers primary/secondary, although the older configuration keywords are still supported and remain useful for compatibility with older RHEL releases. In This Article 1. Configure the Primary Server 2. Install BIND on the Secondary Server 3. Configure the Secondary Zone 4. Start BIND and Open the Firewall 5. Validate the Zone Transfer 6. Current BIND Terminology 7. Key Takeaways…

08Jul 2013 by Ceyhun Kirmizitas 0 Comments

How to Manage Swap Partitions on RHEL, Rocky Linux, AlmaLinux, and CentOS

Linux

Applies to: RHEL-family Linux — RHEL 6–10 | Rocky Linux 8–10 | AlmaLinux 8–10 | CentOS 6–8 | CentOS Stream 8–10 Linux can use swap when physical memory is under pressure. Swap can be provided by a dedicated partition, an LVM logical volume, or a swap file. The original version of this article was written for RHEL 6 and CentOS 6. The same core swap-management commands are also used on current RHEL, Rocky Linux, AlmaLinux, and CentOS releases, so the procedure below has been updated while keeping the older versions in scope. In This Article 1. Check Current Swap Space 2. Create a Swap Partition 3. Initialize the Partition as Swap 4. Add the Swap Partition to /etc/fstab 5. Activate and Verify Swap 6. Key Takeaways 1. Check Current Swap…

02Jul 2013 by Ceyhun Kirmizitas 0 Comments

Common Linux Network Troubleshooting Commands

Linux

Applies to: RHEL-family Linux — RHEL 6–10 | Rocky Linux 8–10 | AlmaLinux 8–10 | CentOS 6–8 | CentOS Stream 8–10 Linux includes a small set of command-line tools that can quickly answer the most common network troubleshooting questions: Is the interface up? Is there a route? Is the remote host reachable? Is the port listening? Is DNS resolving correctly? The original version of this article used tools such as netstat, arp, and telnet. Those commands are still useful in older environments, but current RHEL-family systems primarily use ip, ss, ip neigh, nmcli, and tools such as nc or curl. In This Article 1. IP Address and Interface Status 2. Routing 3. Reachability 4. Listening Ports and Connections 5. Test a Remote Port 6. DNS Lookups 7. Neighbor Cache 8.…

23May 2013 by Ceyhun Kirmizitas 0 Comments

How to Perform Dial Tone Recovery in Exchange Server

Exchange, Exchange Server SE / 2019 / 2016, High Availability

Applies to: Exchange Server SE / 2019 / 2016 / 2013 / 2010 Dial tone recovery is an Exchange Server recovery method that gives users temporary mailboxes so they can continue sending and receiving email while the original mailbox database is being restored. The original version of this article was written for Exchange Server 2010 with Windows Server Backup. Microsoft still documents dial tone recovery for Exchange Server Subscription Edition, Exchange Server 2019, and Exchange Server 2016. The recovery concept is the same, although the current procedure is based on Exchange Management Shell, a dial tone database, a Recovery Database, and mailbox restore requests. In This Article 1. What Is Dial Tone Recovery? 2. Dial Tone Recovery Process 3. Same Server or Alternate Server 4. Recovery Database and Data Merge…

07May 2013 by Ceyhun Kirmizitas 0 Comments

Step by Step Upgrade from VMware vCenter Server 5.1 to vCenter Server 5.1 Update 1

Archive / Legacy Topics, VMware, vSphere

Applies to: VMware vCenter Server 5.1 → 5.1 Update 1 Historical: This article covers the Windows-based vCenter Server 5.1 architecture and its upgrade to vCenter Server 5.1 Update 1. This release is no longer supported and the component-by-component upgrade model described here does not apply to current vCenter Server releases. vCenter Server 5.1 separated several core services into individual components, including Single Sign-On (SSO), Inventory Service, vCenter Server, and the vSphere Web Client. Because of that architecture, upgrading to 5.1 Update 1 required the components to be updated in the correct order. In This Article 1. Before the Upgrade 2. Recommended Upgrade Sequence 3. Verify the Upgrade 4. Key Takeaways 1. Before the Upgrade Before upgrading a vSphere 5.1 environment, verify interoperability with any VMware products and plug-ins that depend…

07Mar 2013 by Ceyhun Kirmizitas 0 Comments

How to Install Data Protection Manager 2010 on Windows Server 2008 R2 SP1

Archive / Legacy Topics, System Center, Windows Server

Applies to: System Center Data Protection Manager 2010 | Windows Server 2008 R2 SP1 Historical: System Center Data Protection Manager (DPM) 2010 reached the end of extended support on October 14, 2020. This article is preserved as a reference for older environments. A DPM 2010 installation includes two main parts: installing the required prerequisite components and installing the DPM application itself. The DPM Setup Wizard performs most of this work as part of the integrated installation process. In This Article 1. Before You Start 2. Language Support 3. Install DPM 2010 4. After Installation 5. Key Takeaways 1. Before You Start Before starting the installation, confirm that the DPM server meets the hardware and software requirements for DPM 2010 and Windows Server 2008 R2 SP1. Verify the operating system and…