Category: Network

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SSH Public Key Authentication to Access Linux (2)

SSH Public Key Authentication to Access Linux (2)

This post demonstrates how to generate a public and private key pair using PuTTYgen on Windows; and how to convert a .pem ( Privacy Enhanced Mail cert [...]
VRF Route Leaking with MP-BGP: routing control for AWS transit VPC

VRF Route Leaking with MP-BGP: routing control for AWS transit VPC

The AWS transit VPC, which adopts a hub-spoke architecture to traverse traffic between other VPCs and on-premises, uses BGP as dynamic routing. VRF ro [...]
Jabber Deployment ‘Gotchas'(2): Contact Directory Search Why LDAP?

Jabber Deployment ‘Gotchas'(2): Contact Directory Search Why LDAP?

Despite Cisco supports both UDS and LDAP directory search, I'd recommend to use LDAP directory search only, due to the caveats associated with UDS sea [...]
Jabber Deployment ‘Gotchas'(1): Cisco Unified Communications Manager IM and Presence Centralised Deployment

Jabber Deployment ‘Gotchas'(1): Cisco Unified Communications Manager IM and Presence Centralised Deployment

The centralised deployment can provide IM and Presence services to multiple remote CUCM voice and video clusters. In a centralised deployment, the IM [...]
Avoid Asymmetric Routing in Load Balancing (pfSense example)

Avoid Asymmetric Routing in Load Balancing (pfSense example)

Introduction My previous blogs Use pfSense to Load Balance Web Servers (1) and Use pfSense to Load Balance Web Servers (2) introduced the deployment o [...]
Set up NGINX as Reverse Proxy with Caching

Set up NGINX as Reverse Proxy with Caching

Introduction This lab reuses the server infrastructure built in Deploy Scalable and Reliable WordPress Site on LEMP(1), but add another Nginx server [...]
Use pfSense to Load Balance Web Servers (2)

Use pfSense to Load Balance Web Servers (2)

Use pfSense to Load Balance Web Servers (1) introduces pfSense, the lab setup, VM specs and download links. This blog will demonstrate pfSense configu [...]
Use pfSense to Load Balance Web Servers (1)

Use pfSense to Load Balance Web Servers (1)

What is pfSense? pfSense is a FreeBSD-based distribution to be installed as physical or virtual machine. It can function as below: Router Firewall [...]
Multi-VRF DMVPN with NHS Cluster and IPSec IKEv1

Multi-VRF DMVPN with NHS Cluster and IPSec IKEv1

Lab Introduction This lab is related to my previous post DMVPN Phase3 IKEv1 and NHS Cluster. The previous post shows 'the crypto keyring can only be t [...]
GNS3 Lab: Connect to Physical LAN and Use Layer3 Switch

GNS3 Lab: Connect to Physical LAN and Use Layer3 Switch

Introduction This lab covers: Connecting GNS3 dynamips devices to physical LAN, so that we can Telnet/SSH devices from host PC/laptop. Installing L [...]
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