Crystal Business Center

ул. "Осогово" 40, Sofia, Bulgaria, 1303

Crystal Business Center is located in the central part of Sofia, on the corner of "Osogovo" street. and "Todor Aleksandrov...

Subcategories (11)

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Wireshark
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VoIP
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Cisco
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Telecom
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Network Security
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HAProxy
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ProxySQL
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Software-Defined Networking (SDN)
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P4

Explore Our Courses

Cisco Switching Solutions: Advanced Implementation and Management

 35 Hours
This instructor-led, live training in Sofia (online or onsite) is aimed at intermediate-level network engineers, architects, and system administrators who wish to gain the knowledge and skills required to implement and manage Cisco's Nexus 9K and Catalyst 9200/9500 series switches. It combines theoretical knowledge with hands-on practical experience, focusing on the Cisco NX-OS and IOS-XE platforms.By the end of this training, participants will be able to:
  • Install and manage Cisco Nexus 9K and Catalyst 9200/9500 switches.
  • Configure advanced switch features for optimal performance.
  • Integrate switches into diverse network environments.
  • Enhance network resilience and efficiency.
  • Utilize switches for high availability and data management.
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CCNA Routing & Switching

 28 Hours
This instructor-led, live training in Sofia (online or onsite) is aimed at expert-level network professionals who wish to prepare for the CCNA Routing & Switching certification exam.By the end of this training, participants will be able to:
  • Develop a comprehensive understanding of networking fundamentals.
  • Master IP connectivity and understand WAN technologies.
  • Secure network devices using Access Control Lists (ACLs), VPNs, and other security protocols to prevent unauthorized access and threats.
  • Prepare for the CCNA Routing & Switching Certification exam.
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Implementing and Configuring Cisco Identity Services Engine (SISE) v4.0

 21 Hours
This instructor-led, live training in Sofia (online or onsite) is aimed at intermediate-level network security professionals who wish to learn how to implement and configure Cisco ISE to enhance the security posture of their network infrastructure.By the end of this training, participants will be able to:
  • Understand Cisco ISE architecture and access control capabilities.
  • Implement basic network access control and advanced network access control.
  • Configure and manage TACACS+ for device administration, command authorization, and role-based access control.
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Transforming to a Cisco Intent-Based Network (IBNTRN) v1.1

 21 Hours
This instructor-led, live training in Sofia (online or onsite) is aimed at intermediate-level network professionals who wish to achieve more agile, secure, and efficient networks that align closely with their business objectives and adapt to changing needs and threats dynamically.By the end of this training, participants will be able to:
  • Understand the fundamentals of Intent-Based Networking.
  • Implement network automation and integrate security in the Intent-Based Network.
  • Use analytics for network monitoring and how assurance can provide insights into network performance and user experience.
  • Designing and deploying an IBN that meets business requirements and operational objectives.
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Implementing Cisco Enterprise Wireless Networks (ENWLSI) v2.0

 21 Hours
This instructor-led, live training in Sofia (online or onsite) is aimed at intermediate-level network professionals who wish to implement and secure wireless networks within an enterprise environment using Cisco equipment and technologies.By the end of this training, participants will be able to:
  • Design and Implement FlexConnect Architectures.
  • Implement Quality of Service in a wireless network environment.
  • Configure and troubleshoot multicast in a wireless network.
  • Implement security for wireless client connectivity.
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Cisco Unified Communications Management v12.x Administration

 35 Hours
This instructor-led, live training in Sofia (online or onsite) is aimed at intermediate-level network engineers who wish to gain the skills and knowledge necessary to effectively administer, manage, and optimize Cisco Unified Communications Manager (CUCM) v12.x. By the end of this training, participants will be able to:
  • Understand CUCM architecture and deployment.
  • Learn how to install, set up, and perform initial configurations of CUCM, including the setup of users, devices, and basic network settings.
  • Implement and manage call routing.
  • Perform system maintenance and troubleshooting.
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Cisco ISE Management and Administration

 28 Hours
This instructor-led, live training in Sofia (online or onsite) is aimed at intermediate-level network administrators who wish to learn how to implement, configure, and optimize ISE for effective network security. By the end of this training, participants will be able to:
  • Deploy Cisco ISE in various network environments, considering best practices, hardware, and software requirements.
  • Implement network profiling to identify and classify connected devices.
  • Manage authorization and access control.
  • Configure posture policies, remediation actions, and compliance modules.
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Cisco CCNP

 35 Hours
This instructor-led, live training in Sofia (online or onsite) is aimed at advanced-level network professionals who wish to gain a deeper understanding of Cisco Enterprise Network and pass the CCNP certification exam. By the end of this training, participants will be able to:
  • Understand the architecture and components of Cisco enterprise networks.
  • Implement and troubleshoot advanced routing technologies and secure enterprise LAN and WAN networks.
  • Configure and manage Cisco SD-WAN solutions for enterprise networks.
  • Design enterprise networks with an emphasis on scalability, security, and availability.
  • Take the CCNP Certification Exam with confidence.
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Kubernetes Networking with Calico

 14 Hours
This instructor-led, live training in Sofia (online or onsite) is aimed at engineers who wish to optimize networking for Kubernetes clusters. By the end of this training, participants will be able to:
  • Install and configure Calico.
  • Understand how Calico differs from traditional overlay networks.
  • Understand how Calico combines internet routing protocols with consensus-based data stores.
  • Use Calico to create a container networking solution for Kubernetes clusters.
  • Use Calico to provide network policy for Kubernetes.
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Cisco CCNA Syllabus in 5 Days

 35 Hours
A 5 day practical networking course designed to familiarise students with Cisco IOS (version 12). The course details the key commands used to configure and secure Cisco routers and switches, and covers the CCNA syllabus - including wired and wireless LAN access. Students will inter-connect networks by implementing static routes, distance-vector and link-state based dynamic routing protocols. The devices will be configured to route traffic across LAN/VLAN//WAN boundaries, by encapsulating datagrams across serial data links using various WAN protocols, such as HDLC, Frame Relay, ISDN and PPP (with CHAP authentication). VLAN encapsulation/tagging will be via IEEE802.1Q/P. Standard and Extended Access Control Lists will be configured and applied to router interfaces to filter traffic based on IP address and/or traffic type. Students will configure static and dynamic NAT to route between private and public networks and cover the theory of Virtual Private Networks (VPN's) Students will copy router configurations and IOS images to/from a TFTP Server. Privileged commands will be used to debug TCP/IP protocols to ensure proper operation of the routers. Students will also perform password recovery operations. The course is primarily aimed at IP v4 but does give an overview of IP v6 addressing and covers migration from an IP v4 to an IP v6 network. Other protocols and technologies (VPN's / Wireless) may be demonstrated if time permits. Course can be customised to precise requirements of customer. Audience: This course is suitable for anyone looking for a basic understanding of internetworking with Cisco devices and covers the CCNA syllabus. Course is approximately 50% practical
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Cisco ASA/Pix Operation

 28 Hours
A 4 day instructor-led practical course designed to familiarise delegates with the Cisco ASA Firewall CLI and ASDM. The course details the key commands used to configure and secure networks using the ASA Firewall with v8 of the operating system and version 6 of the ASDM. Delegates will configure the ASA using the console port, TFTP server, telnet and SSH using local and RADIUS authentication. The device will be configured to utilise Syslog and SNMP. ASA Firewalls will also be configured to use Access-Lists, Network Address Translation and VPN's utilising IPSec protocols. The course will cover the theory of Public/Private Keys, shared secret keys and their use in forming Site to site VPN's between ASA Firewalls using IKE and IPSec. Students will configure the units to create site to site VPN's, remote access VPN's using the Cisco Secure VPN Client and Web VPN's. The course will cover the theory of failover and delegates will configure Active/Standby failover on the ASA. Privileged commands and protocol analyser traces will be used, where necessary, to debug protocols and ensure proper operation of the ASA Firewall. Students will also perform password recovery operations. This course will involve interfacing the ASA with other network equipment, such as routers and switches, as would be expected in a network environment. Audience: Course is suitable for anyone involved in ASA firewall configuration and network security Course is approximately 50% practical
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DNS and BIND: Setting Up, Managing and Securing Your DNS Server

 14 Hours
In this instructor-led, live training in Sofia, participants will learn the critical features of DNS while carrying out exercises in the setup and configuration of a BIND DNS server on Linux. The course starts with a refresher on key networking principles, then digs into hands-on practice with setup and configuration. Steadily, the discussion and practices move towards more complex topics such as security, availability, debugging and troubleshooting.
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Understanding IPSec VPNs

 14 Hours
This 2 day course investigates the theory and technology associated with IPSec VPN’s.VPN’s are setup using Cisco IOS Routers and ASA Firewalls using the web interface. The workings of the protocols are examined using debug commands and protocol analyser traces of relevant negotiations. Audience: Suitable for network planners, engineers or anyone interested in IPSec VPNs Course is approximately 40% practical
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Understanding IPv6

 14 Hours
A 2 day theoretical course (with some practical demonstrations) covering the fundamentals of Internet Protocol v6 – including addressing, protocol formats, ICMP v6, discovery processes and IP v6 routing. Audience: Network Planners, Designers, and Engineers requiring an understanding of IP v6. Those requiring a comprehensive overview of IP v6 and the migration process from an IP v4 environment.
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Metro-Ethernet Service and Troubleshooting

 28 Hours
This 4 day coursework is intended for Telecom management and technology professionals who
have to maintain MetroEthernet services across the globe. The course introduces all the
prevailing standards, Troubleshooting guides, vendor options and evolving technologies in
Metro Ethernet domain.
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Python for Network Engineers

 14 Hours
This instructor-led, live training in Sofia (online or onsite) is aimed at network engineers who wish to maintain, manage, and design computer networks with Python. By the end of this training, participants will be able to:
  • Optimize and leverage Paramiko, Netmiko, Napalm, Telnet, and pyntc for network automation with Python.
  • Master multi-threading and multiprocessing in network automation.
  • Use GNS3 and Python for network programming.
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Networking Fundamentals

 21 Hours
This instructor-led, live training in Sofia (online or onsite) is aimed at anyone who wish to understand and implement a network and various types of servers under Linux. By the end of this training, participants will be able to:
  • Understand how networking works under Linux.
  • Set up a sample LAN.
  • Understand the various protocols used on the internet and implement each one under Linux.
  • Secure a networking and various types of servers, such as a webs server.
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Interconnecting Cisco Networking Devices: Accelerated (Pre-CCNA)

 1 Hours
This course introduces you to how to install, operate, configure, and verify a basic Internet Protocol version 4 (IPv4), including configuring a LAN switch, configuring an IP router, connecting to a WAN, and identifying basic security threats   This course will help you:     Install, operate, configure, and verify a basic IPv4 network     Perform basic troubleshooting steps in enterprise branch office Format of the Course
  • Interactive lecture and discussion.
  • Lots of exercises and practice.
  • Hands-on implementation in a live-lab environment.
Course Customization Options
  • To request a customized training for this course, please contact us to arrange.
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SAN and NAS Storage

 14 Hours
This instructor-led, live training in Sofia (online or onsite) is aimed at network engineers who wish to converge storage infrastructures with SAN and NAS. By the end of this training, participants will be able to:
  • Perform configurations of SAN and NAS storage on a storage system.
  • Connect to storage systems and devices from a client.
  • Compare SAN and NAS solutions for centralized storage.
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Shadowsocks: Set Up a Proxy Server

 7 Hours
Shadowsocks is an open-source, secure socks5 proxy. In this instructor-led, live training, participants will learn how to secure an internet connection through a Shadowsocks proxy. By the end of this training, participants will be able to:
  • Install and configure Shadowsocks on any of a number of supported platforms, including Windows, Linux, Mac, Android, iOS, and OpenWrt.
  • Deploy Shadosocks with package manager systems, such as pip, aur, freshports and others.
  • Run Shadowsocks on mobile devices and wireless networks.
  • Understand how Shadowsocks encrypts messages and ensures integrity and authenticity.
  • Optimize a Shadowsocks server
Audience
  • Network engineers
  • System Administrators
  • Computer technicians
Format of the course
  • Part lecture, part discussion, exercises and heavy hands-on practice
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Practical TCP/IP

 28 Hours
This 4 day course involves a mixture of expository based (utilising protocol analyser traces where appropriate) and practical experiments to test and verify the operation of TCP/IP networks. The major aspects of the TCP/IP protocol stack are covered, including subnetting, supernetting and running dynamic routing protocols. TCP and UDP will be compared and contrasted, covering the end-to-end reliability and congestion avoidance capabilities of the TCP/IP stack. Some application layer protocols (HTTP, TLS, DNS, DHCP etc) will be investigated during the course. Network security in the form of TLS will be covered both from a theoretical and practical standpoint. The practical exercises are designed to augment the theory and enhance both the understanding of the underlying protocols and also the problem solving abilities of the delegates. Audience: Suitable for anyone looking for an understanding of TCP/IP. Course is approximately 50% practical.
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Tinc VPN

 14 Hours
Tinc VPN is an open source peer-to-peer virtual private network (VPN) daemon that is compatible with most operating systems. Tinc VPN makes use of tunneling and encryption to build a secure private network between hosts. In this instructor-led, live training, participants will learn the fundamentals of working with Tinc VPN. By the end of this training, participants will be able to:
  • Install, configure, run, test, and troubleshoot Tinc VPN on any operating system
  • Deploy a Tinc Mesh VPN
  • Use Tinc VPN for Centralized Cloud Interconnection
Audience
  • Developers
  • Network engineers
Format of the course
  • Part lecture, part discussion, exercises and heavy hands-on practice
Note
  • To request a customized training for this course, please contact us to arrange.
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Understanding Modern Information Communications Technology

 7 Hours
This instructor-led, live training in Sofia (online or onsite) is aimed at beginner-level to intermediate-level IT professionals who wish to understand the basics and principles of modern information and communication technologies and their applications. By the end of this training, participants will be able to:
  • Explain the main components and functions of the internet architecture and how they interact.
  • Describe the features and benefits of modern network solutions and implementations, such as fiber technology, clustering, and internet of things.
  • Understand the concepts and models of cloud computing and its services, such as infrastructure as a service and virtualization.
  • Identify the future trends and directions of information and communication technologies and their implications.
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VoIP with Cisco CallManager Express

 35 Hours
VoIP (Voice over Internet Protocol) is a technology that makes it possible for users to make voice calls over an Internet connection instead of through a regular phone line. In this instructor-led, live training, participants will learn how to set up a VoIP system using Cisco CallManager Express. By the end of this training, participants will be able to:
  • Understand fundamental VoIP concepts
  • Learn how to use VoIP equipment
  • Configure CISCO routers for VoIP
  • Implement VoIP and CallManager Express into their network
  • Configure CME features for SIP, SCCP, and soft phones
  • Work with advanced configuration settings and features of CME
Audience
  • Managers
  • System administrators
  • Software and support system developers
  • Technicians
  • Network engineers
Format of the course
  • Part lecture, part discussion, exercises and heavy hands-on practice
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Deploying a Cisco SD-WAN

 21 Hours
SD-WAN is a software-defined approach to managing a WAN (Wide Area Network). This instructor-led, live training (online or onsite) is aimed at engineers who wish to use Cisco SD-WAN products to set up and operate a software defined network. By the end of this training, participants will be able to:
  • Install and configure a Cisco SD-WAN.
  • Create policies to control network traffic.
  • Understand and implement overlay routing.
  • Simplify the management of the network used for public cloud applications.
Format of the Course
  • Interactive lecture and discussion.
  • Lots of exercises and practice.
  • Hands-on implementation in a live-lab environment.
Course Customization Options
  • To request a customized training for this course, please contact us to arrange.
Read more...

SIP protocol in VoIP

 21 Hours
The course consists of two complementary parts – a theoretical and a practical one. The first is a one day introduction covering motivation, philosophy, fundamentals and rules of operation of the SIP protocol and ways it is used to implement telecom services with focus on IP telephony and VoIP. The second two-day part enables participants to learn practical aspects of service operation within a framework of hand-on laboratory exercises giving detailed insight into configuration of components of SIP telephony architecture, SIP signalling at both message sequence chart and internal message structure levels, and assists in understanding of typical problems and troubleshooting including security and telecom fraud aspects. The trainers will share their experience in launching, operation and management of SIP telephony covering also virtualization and cloud based solutions. Practical part is presented using both SIP hardphones and softphones and IP telephony servers (Asterisk and Freeswitch). Participants can take advantage of the fact trainers have got rich technical and business experience in IP telephony and submit their own problems and questions. They will be included in the agenda at wrap-up as a supplement to the training to meet current urgent needs of clients. Training is addressed to participants with basic knowledge and experience in telecom services – specifically in VoIP and IP networking.
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BeyondCorp: Implementing Zero Trust Security

 14 Hours
BeyondCorp is an open source Zero Trust security framework that allows employees to work securely from any location without the need for a traditional VPN. In this instructor-led, live training, participants will learn hands-on how to set up a Zero Security system as they set up and deploy BeyondCorop in a live-lab environment. By the end of this training, participants will be able to:
  • Assess their organization's existing security model.
  • Shift access controls from the perimeter to individual devices and users.
  • Deploy applications using a user and device-centric authentication and authorization workflow.
  • Understand, plan and implement a Zero Trust network within their organization.
Audience
  • Network engineers
  • Cyber security professionals
  • System architects
  • IT managers
Format of the Course
  • Part lecture, part discussion, exercises and heavy hands-on practice
Note
  • To request a customized training for this course, please contact us to arrange.
Read more...

Network Security

 14 Hours
Since all applications today heavily rely on communication and networks, there is no application security without network security. This course focuses on network security with a software security viewpoint, and discusses common network attacks and defenses on different OSI layers, with an emphasis on application layer issues, tackling topics like session management or denial of service. As cryptography is a critical aspect of network security, the most important cryptographic algorithms in symmetric cryptography, hashing, asymmetric cryptography, and key agreement are also discussed. Instead of presenting an in-depth mathematical and theoretical background, these elements are discussed from a merely practical, engineering perspective, showing typical use-case examples and practical considerations related to the use of crypto, such as public key infrastructures. Security protocols in many areas of secure communication are introduced, with an in-depth discussion on the most widely-used protocol families such as IPSEC and SSL/TLS. Finally, typical crypto vulnerabilities are discussed – both related to certain crypto algorithms and cryptographic protocols, such as BEAST, CRIME, TIME, BREACH, FREAK, Logjam, Padding oracle, Lucky Thirteen, POODLE and similar, as well as the RSA timing attack. In each case, the practical considerations and potential consequences are described for each problem, again, without going into deep mathematical details. Participants attending this course will
  • Understand basic concepts of security, IT security and secure coding
  • Learn about network attacks and defenses at different OSI layers
  • Have a practical understanding of cryptography
  • Understand essential security protocols
  • Understand some recent attacks against cryptosystems
  • Get information about some recent related vulnerabilities
  • Get sources and further readings on secure coding practices
Audience Developers, Professionals
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Network Security in Linux

 14 Hours
During the course, participants will learn:
  • What is denial of service attacks, Flooding, Sniffing, MIM?
  • How to break from the network to the server?
  • How to watch packets on the network (also running on switches)?
  • Do you watch any combination of the world?
  • How to monitor the network?
  • How to configure a firewall?
  • How to use encrypted connections?
  • How to create tunnels?
  • How to log packets?
  • How to scan ports?
  • How to reduce the number of unnecessary services on the server?
Read more...

Network Security Administrator

 35 Hours
Audience: System Administrators and Network Administrators as well as anyone who is interested in defensive network security technologies.  
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Testimonials (20)

Interesting labs, help from trainer

Alexey - Tink Poland sp. z o. o.
Course - Certified Kubernetes Application Developer (CKAD) - exam preparation

The trainer Luc is fantastic, he has in-depth knowledge of the subject, a human approach and an ability to adapt to live needs.

Salim - LHH
Course - Certified Kubernetes Administrator (CKA) - exam preparation

Machine Translated

I found new things.

Cristian
Course - OpenStack Security

Professionalism on the part of the instructor and his commitment to transferring knowledge,

Tomasz - WB Electronics S.A.

Machine Translated

Ease and ease of conducting training.

Jarosław - Politechnika Wrocławska
Course - SIP protocol in VoIP

Machine Translated

Experience of the trainor and interaction

Michael Angelo - Metropolitan Bank and Trust Company
Course - Cisco CCNA Syllabus in 5 Days

The trainer is so well informed and engaging.

Elias - Armscor
Course - Cisco ASA/Pix Operation

Not standard transfer of knowledge.

Daniel - mikroBIT sp. z o.o.
Course - System and Network Security with FortiGate

Machine Translated

Trainer very engaging and knowledgeable

Effendy Bin Ahmad sata - SBS transit
Course - Basic Network Troubleshooting Using Wireshark

First of all it was very interesting practically for all topics covered by this training. Well balanced with theory, practise labs and breaks. Some of tips and tricks I have introduced to my work yet.

Dawid Woźny - ATOS PGS sp. z o.o.
Course - Advanced Network Troubleshooting Using Wireshark

examples based on our data

Witold - P4 Sp. z o.o.
Course - Deep Learning for Telecom (with Python)

knowledge about HAProxy

Marco - CloudFire
Course - HAProxy Administration

It gave me a clear and in depth understanding of NAS and SAN storage

Joubert Choshi - Netcampus
Course - SAN and NAS Storage

communication, knowledge from experience, solve problems,

Marcin Walewski - Intel Technology Poland Sp. z o.o.
Course - OpenStack Bootcamp

good knowledge of technical issues, very detailed explanation of topics

Marcin Brzozowski - Asseco Business Solutions S.A.
Course - Deploying a Cisco SD-WAN

Trainer knows very well the subject. He try to give a lot of examples in order that we understand "how" it is working. He answer to all questions raised. Very available.

christel salve - BICS
Course - Blockchain for Telecom

The varied topics

Daniel Lindh - Tele 2 Sverige AB
Course - OpenStack for Telecom

The virtual desktop in a browser feature was kind of neat.

Mikael Karlsson - Polystar OSIX
Course - OpenStack Architecture and Troubleshooting

His huge amount of knowledge.

Mirela Ochia - Deutsche Telekom Pan-Net Romania S.R.L.
Course - Practical SIP Telephony

I generally was benefit from the whole training.

Tassos Papadopoulos
Course - Nessus Manager

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