Windows Server Software Defined Networking (SDN) and Hyper-V Network Virtualization (HNV) – Part 5: Extending Overlapping Tenant Networks with VRFs
In the previous parts, we demonstrated how Hyper-V Network Virtualization (HNV) allows multiple tenants to use overlapping IP address spaces…
Troubleshooting a Btrfs Root Filesystem Forced Read-Only by ENOSPC During a Balance Operation
In this article, we will troubleshoot a Btrfs root filesystem that suddenly became read-only, even though df still reported several…
Understanding and Setting Up NFSv4 Kerberos Authentication in NetApp ONTAP
In previous articles, we explored how NFSv4 identity mapping works in NetApp ONTAP and how Microsoft Active Directory can be…
Using Active Directory as a Central UNIX Identity Store for NFS with NetApp ONTAP and Linux
In traditional NFS environments, consistent UNIX user and group identities must be available across NFS servers and clients. While these…
Understanding NFSv4 Identity Mapping in NetApp ONTAP (AUTH_SYS and File Ownership Under the Hood)
NFSv4 introduced significant changes compared with NFSv3, including how file and directory ownership is represented between NFS servers and clients….
Passwordless Authentication in Linux – Part 3 – Certificate-Based and FIDO2 Authentication
After exploring certificate-based authentication and Passkeys on FIDO2 for Windows in Part 1 and Part 2, this third part takes…
Understanding Windows-to-UNIX User Mapping with UNIX Security Style in NetApp ONTAP
When Windows users access data stored on a NetApp ONTAP volume using UNIX security style, ONTAP must translate the Windows…
Understanding NFS AUTH_SYS User Mapping with NTFS Security Style in NetApp ONTAP
When NFS clients access data on a NetApp ONTAP volume using NTFS security style, ONTAP cannot simply evaluate the UNIX…
Understanding ICMP Redirects – Why Your Network Traffic Suddenly Takes a Different Route
When a host needs to communicate with a destination outside its local subnet, it normally forwards the packet to its…
Understanding Remote Procedure Calls (RPC) on Linux – Building an ONC RPC Client and Server and Analyzing the Network Traffic
In my previous article, we explored Microsoft’s implementation of Distributed Computing Environment / Remote Procedure Call (DCE/RPC) by building a…
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