Setting up a 2-in-1 VM for Labs using Windows Subsystem Linux (WSL)

I am currently preparing a Network Fundamentals training that I'll be presenting in June and as part of that, I need a VM that I can share with the participants as I'll be incorporating some hands-on exercises in my presentation. Instead of setting up two different machines, I opted to use a Windows 10 VM … Continue reading Setting up a 2-in-1 VM for Labs using Windows Subsystem Linux (WSL)

Setting up an IPSec VPN using Cisco Packet Tracer

This week was a rather intense one. I offered to be a volunteer trainer for a Network Security Bootcamp whose aim was to provide practical experience to new graduates and prepare them for a job in the Network Security field. At the end of the course, the students are expected to pass several exams among … Continue reading Setting up an IPSec VPN using Cisco Packet Tracer

Patching Cisco ACS 5.4

Current Status and version before patching acs100/admin# show application version acs Cisco ACS VERSION INFORMATION ----------------------------- Version : 5.4.0.46.0a Internal Build ID : B.221 acs100/admin# show application status acs ACS role: PRIMARY Process 'database'                  running Process 'management'                running Process 'runtime'                   running Process 'ntpd'                      running Process 'view-database'             running Process 'view-jobmanager'           running Process 'view-alertmanager'         running Process 'view-collector'            … Continue reading Patching Cisco ACS 5.4

Citrix Netscaler 10 Summary Notes – Getting Started – Day 6

Load Balancing Overview Distributes client requests across multiple servers to optimize resource utilization Prevents bottlenecks Configuration: Define a virtual server that proxies multiple servers in a server farm Balance the load Provides traffic management from Layer 4 (TCP and UDP) through Layer 7 (FTP, HTTP, and HTTPS) Load balancing algorithms are used to determine how to … Continue reading Citrix Netscaler 10 Summary Notes – Getting Started – Day 6

CCDA 640-864 Summary Notes – Chapter 5 – Day 10

Exam Topic 2 - Part 1: Cisco Unified Wireless Network (UWN) Architecture Benefits: Deliivers scalable, manageable and secure WLANs Combines wired and wireless network Reduced Total Cost of Ownership (TCO) Enhanced visibility and control Dynamic RF management WLAN Security Mobility Enhanced productivity and collaboration Network Elements: Client devices access points - access to the network network … Continue reading CCDA 640-864 Summary Notes – Chapter 5 – Day 10

Citrix Netscaler 10 Summary Notes – Getting Started – Day 5

System Configuration slot/port VLANS Supports IEEE802.1Q VLANS Supported: Default VLAN = 1 PortBased VLAN Tagged VLAN (nsvlan) Link Aggregate Channels Channel parameters have precedence over the interface parameters Clock Clock synchronization is done in shell DNS Can Function as: Authoritative Domain Name Server (ADNS) DNS proxy server End Resolver Forwarder (typical config) Can add resource records such … Continue reading Citrix Netscaler 10 Summary Notes – Getting Started – Day 5

Citrix Netscaler 10 Summary Notes – Getting Started – Day 4

Citrix NetScaler Editions Feature licence required on all editions Standard Edition SME comprehensive L4-L7 traffic management Web application availability Enterprise Edition Advanced  L4-L7 traffic management Web Application acceleration Increases Web application performance, availability and reduced costs Platinum Edition Reduces data center costs Accelerates application performance End to end visibility of application performance Advanced application security Administration options: … Continue reading Citrix Netscaler 10 Summary Notes – Getting Started – Day 4

CCDA 640-864 Summary Notes – Chapter 4 – Day 8

Exam Topic 4: Virtualization Overview Virtualization technologies abstract logical elements from hardware (applications or operating systems) or networks (LANs and SANs) and run them in a virtual state Allow a physical device to share its resources by acting as multiple versions of itself Allow multiple physical devices to logically appear as one Benefits of virtualization improves network efficiency provides enhanced flexibility … Continue reading CCDA 640-864 Summary Notes – Chapter 4 – Day 8

Citrix Netscaler 10 Summary Notes – Getting Started – Day 3

Understanding the NetScaler An Application L4-L7 Switch. Used for Web Applications. Functions as a TCP Proxy Features: Switching Features for optimal distribution of client requests Security and protection Features protects web applications from application-layer attacks Server-farm Optimization Features speeds up applications by offloading resource-intensive operations from the server Placement Request Switching Netscaler is deployed infront of a … Continue reading Citrix Netscaler 10 Summary Notes – Getting Started – Day 3

CCDA 640-864 Summary Notes – Chapter 4 – Day 7

Data Center Design Exam Topic 1: Enterprise DC Architectures Data Center 1.0 Centralized Used mainframes to process and store data Users used terminals to access and work on mainframes benefits: availability, resiliency, and service level agreements (SLA) Data Center 2.0 client/server and distributed computing into the mainstream data center Bussiness applications installed on servers users accessed data … Continue reading CCDA 640-864 Summary Notes – Chapter 4 – Day 7

CCDA 640-864 Summary Notes – Chapter 3 – Day 6

Server Connectivity Options Single NIC (FE GE Full duplex + No redundancy) Dual NIC Etherchannel - redundancy Dual NIC to separate access - redundancy Content switching - redundancy + load balancing per user request Enterprise Data Center Port density for servers Low latency layer 2 Suport both single and dual connected servers Aggregation (Distribution) Layer … Continue reading CCDA 640-864 Summary Notes – Chapter 3 – Day 6

CCDA 640-864 Summary Notes – Day 5

LAN Hardware Repeaters Layer 1 device Connects separate segments Do not control broadcasts or collision domains Forward frames out all other interfaces Protocol transparent understands bits Amplify the signals 5-4-3 Rule: The maximum path between two stations on the network should not be more than five segments, with four repeaters between those segments, and no more than … Continue reading CCDA 640-864 Summary Notes – Day 5

CCDA 640-864 Summary Notes – Day 4

IEEE 802.3-2002 (Ethernet Standards) Design Rules Round trip propagation delay should be less than 512-bit times in one collision domain. Max for 10 Mbps - 51.2 microseconds. Max for 100 Mbps - 5.12 microseconds 10 Base 5 No longer used Max segment = 500 m Max collision domain = 2500m of 5 segments Has a maximum diameter … Continue reading CCDA 640-864 Summary Notes – Day 4

CCDA 640-864 Summary Notes – Day 3

Hierarchical Network Models Advantages Cost savings Ease of understanding becausee of simple design and lower management costs as monitoring systems are distributed. Network growth as changes are contained to a small subset  of the network and only impact that small area Easy to isolate a problem in the network if the hierarchial model is used … Continue reading CCDA 640-864 Summary Notes – Day 3

Summary Notes: JUNOS as a second Language

Differences between IOS and JUNOS. 1) JUNOS can be managed using the following options: CLI - Console, SSh and Telnet J-Web SNMP Junoscope Junos Script API NETCONF API SDX Service Deployment System 2) Using pipe show interfaces terse show interfaces terse | match se-3 show interfaces terse | except fe- show interfaces terse | count … Continue reading Summary Notes: JUNOS as a second Language

Aruba 3200XM – Initial Configuration – Part 1

Got a larger toy 🙂 Initialization Wizard via Console Loading image 0:0############################################################################################################################################################################################################################################################################################################## Image is signed; verifying checksum... passed Signer Cert OK Policy Cert OK RSA signature verified. Booting image... Uncompressing core image files... 00:00:07 done. 00:00:42 Aruba Networks ArubaOS Version 6.1.3.6 (build 36470 / label #36470) Built by p4build@corsica.arubanetworks.com on 2012-12-11 at 12:51:05 PST (gcc … Continue reading Aruba 3200XM – Initial Configuration – Part 1

Day out with Aruba Controller 620 – Initial Configuration – Part 1

Playing around with my new toy 🙂 Just trying to find out what the Controller supports: Number of APs supported (Aruba620) #show license-usage ap AP Licenses ----------- Type Number ---- ------ AP Licenses 4 Overall AP License Limit 4 AP Usage -------- Type Count ---- ----- CAPs 0 RAPs 0 Tunneled nodes 0 Total APs … Continue reading Day out with Aruba Controller 620 – Initial Configuration – Part 1

Aruba 620 Controller Factory Reset

Doesn't it feel good starting on a clean slate...! Oh well, at least for Networking devices 🙂 Erase it all... (Aruba620) #write erase all Switch will be factory defaulted. All the configuration and databases will be deleted. Press 'y' to proceed : Write Erase successful Reload (Aruba620) #reload Do you really want to restart the … Continue reading Aruba 620 Controller Factory Reset

JNCIA Summary Notes – Day 2

JUNOS software Naming Example: jbundle-5.2R1.4-domestic-signed.tgz jbundle - package (jbundle, jroute, jpfe) 5.2 - Major version R - Stage (R - publicly released, A - Alpha version , B - Beta Version, I - Internal Test version) 1.4 - released_version domestic - type ( domestic contains jcrypto, expo does not) signed - package is protected with md5 … Continue reading JNCIA Summary Notes – Day 2