networking Archives - ITFROMZERO

Configuring Docker Macvlan Network: Assigning Static IPs from the Physical LAN to Containers

By IT From Zero October 27, 2026

A guide to Docker Macvlan configuration: assign physical LAN static IPs to containers, bypass NAT, and resolve host-to-container connectivity issues.

Virtualization

Configuring SR-IOV on KVM/Proxmox: Share 10GbE NICs with Near Bare-Metal Performance

By IT From Zero October 24, 2026

A comprehensive guide to configuring SR-IOV on Proxmox/KVM to split 10GbE NICs into Virtual Functions. Achieve 9.4 Gbps throughput, reduce host CPU usage below 5%, and drop latency to 0.05ms.

Virtualization

Optimizing KVM Networking with virtio-net Multiqueue and vhost-net: Hitting Full 10GbE Without CPU Bottlenecks

By IT From Zero October 23, 2026

KVM virtual machine stuck at 2 Gbps on a 10GbE network? A single-queue virtio setup is usually to blame. Learn how to configure virtio Multiqueue and vhost-net to unlock full 9.4 Gbps throughput without overloading your vCPUs.

Virtualization

Configuring Open vSwitch on Proxmox VE: Bridges, Bonds, and GRE Tunnels

By IT From Zero October 17, 2026

Troubleshoot Proxmox VE networking with Open vSwitch: quickly deploy emergency OVS Bridges, aggregate fault-tolerant 10GbE links with LACP Bonds, and connect cross-node VMs via GRE Tunnels.

Network

How to Set Up an Internal Chrony NTP Server on Linux: Accurate and Secure for Production

By IT From Zero October 5, 2026

A hands-on guide to resolving distributed clock drift and setting up a secure, robust internal Chrony NTP server cluster on Linux.

VMware

Fixing MTU Mismatch: When Jumbo Frames Backfire in vSphere Infrastructure

By IT From Zero September 15, 2026

Is your vSphere system lagging or is vMotion stuck at 14%? It might be an MTU Mismatch. Learn how to use vmkping and PowerCLI to diagnose and sync Jumbo Frames 9000 quickly.

Network

WireGuard Split Tunneling Mastery: Don’t Let Your VPN Slow Down Your Internet

By IT From Zero September 6, 2026

Split Tunneling allows you to use a VPN without slowing down your connection. Learn how to configure WireGuard on Linux for selective routing by IP and domain.

Network

Optimizing MTU, Jumbo Frames, and MSS Clamping: The Secret to Fixing Slow Networks and Lag on Linux

By IT From Zero September 4, 2026

Slow network despite high bandwidth? Learn how to optimize MTU, Jumbo Frames, and MSS Clamping on Linux to fix packet fragmentation and boost performance.

Network

Avahi Installation Guide: Automating LAN DNS Without a Central Server

By IT From Zero August 31, 2026

Configure Avahi on Linux to automate device discovery in a LAN via mDNS. A highly efficient alternative to manual DNS for SysAdmins and Developers.

VMware

Mastering pktcap-uw on VMware ESXi: The Ultimate Network Debugging Trick for Every Packet

By IT From Zero August 31, 2026

Forget tcpdump-uw; pktcap-uw is the most powerful tool for network troubleshooting on VMware ESXi. A detailed guide on capturing packets at vSwitch and Uplinks and exporting expert-level pcap files.