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WireGuard Site-to-Site VPN: wg0.conf Configuration Example

WireGuard Site-to-Site VPN: wg0.conf Configuration Example

Build a WireGuard site-to-site VPN between two Linux gateways: key generation, wg0.conf [Interface]/[Peer] sections, AllowedIPs routing, MTU and keepa

admin admin 2026-09-06
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nginx Reverse Proxy Setup: proxy_pass, Headers and Buffers

nginx Reverse Proxy Setup: proxy_pass, Headers and Buffers

Configure nginx as a reverse proxy with proxy_pass: location matching rules, header propagation, buffer tuning and upstream logging, with working conf

admin admin 2026-09-06
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tcpdump Command Examples: Filters and Practical Packet Capture

tcpdump Command Examples: Filters and Practical Packet Capture

Practical tcpdump command examples: interface selection, BPF host/port/protocol filters, pcap capture files, output reading and troubleshooting recipe

admin admin 2026-09-06
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Open vSwitch Basics: Bridges, Access Ports and VLANs

Open vSwitch Basics: Bridges, Access Ports and VLANs

Configure Open vSwitch with ovs-vsctl: bridges, access and trunk ports, tags, internal ports, LACP bonds, tunnels, QoS, mirroring and verification com

admin admin 2026-09-05
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Keepalived VRRP for HAProxy: Virtual IP Failover Setup

Keepalived VRRP for HAProxy: Virtual IP Failover Setup

Build HAProxy high availability with keepalived VRRP: virtual IP failover, health checks, sysctl tuning, unicast VRRP, notify scripts and failover tes

admin admin 2026-09-05
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SSH Tunneling: Local, Remote and Dynamic Port Forwarding

SSH Tunneling: Local, Remote and Dynamic Port Forwarding

SSH tunnel guide: local -L, remote -R and dynamic SOCKS -D port forwarding, ssh_config aliases, GatewayPorts, autossh, security and troubleshooting.

admin admin 2026-09-05
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Docker Networking Drivers: Bridge, Host, Macvlan and Overlay

Docker Networking Drivers: Bridge, Host, Macvlan and Overlay

Docker network drivers: default and user-defined bridge, host, none, overlay, macvlan and ipvlan, with docker network create and troubleshooting examp

admin admin 2026-09-05
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nftables from Scratch: Tables, Chains and NAT Examples

nftables from Scratch: Tables, Chains and NAT Examples

Build a production nftables firewall: inet tables and base chains, ct state filtering, named sets and verdict maps, masquerade NAT, DNAT and iptables

admin admin 2026-09-05
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Linux Policy Routing with ip rule: Multiple Routing Tables

Linux Policy Routing with ip rule: Multiple Routing Tables

Linux policy routing with ip rule: custom tables in rt_tables, source, iif and fwmark rules, symmetric replies and verification on multi-homed hosts.

admin admin 2026-09-05
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Linux tc Traffic Shaping with HTB: Rate, Ceil and Filters

Linux tc Traffic Shaping with HTB: Rate, Ceil and Filters

Shape outbound bandwidth on Linux with tc and HTB: qdisc and class basics, guaranteed rate vs ceil borrowing, u32 filters, burst tuning and iperf3 che

admin admin 2026-09-05
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