Hello, I'm
Mostafa Raihan
Passionate junior network engineer experienced in Cisco, MikroTik, GPON fiber, and ISP operations.
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About Mostafa Raihan
Professional Profile
I am Mostafa Raihan, a passionate Junior Network Engineer with practical knowledge of computer networking, ISP infrastructure, Cisco devices, MikroTik RouterOS and GPON fiber technology.
Industrial Attachment Experience
Successfully completed Industrial Attachment training at One Sky Communications Limited. During this period, gained practical experience in ISP network operations, device configuration, troubleshooting and network maintenance.
Career Objective
My goal is to build my career as a professional Network Engineer by working with modern networking technologies, improving infrastructure reliability and continuously developing my technical skills.
Routing & Switching
VLAN, Inter-VLAN Routing, STP, RSTP, EtherChannel, OSPF and network design.
ISP Network System
MikroTik RouterOS, PPPoE, Firewall, Bandwidth Management.
Fiber Optic Technology
GPON OLT/ONU, Fiber Link Testing, Optical Power Measurement.
Technical Skills
Networking matrix, hardware configuration and practical ISP technology skills.
NETWORKING
CISCO
MIKROTIK
ISP & GPON
SYSTEM ADMIN
Engineering Services
Network infrastructure, ISP solutions and enterprise system support services.
Network Design
LAN/WAN architecture planning, IP addressing, redundancy design and scalable network solutions.
Cisco Configuration
Router and switch configuration, VLAN, trunking, EtherChannel, OSPF, ACL and NAT setup.
MikroTik Configuration
RouterOS configuration, PPPoE server, Firewall, Queue Management, QoS and VPN setup.
ISP Network Setup
ISP user management, bandwidth control, BDIX connectivity, NOC operation and troubleshooting.
GPON Deployment
OLT/ONU provisioning, fiber troubleshooting, optical power checking and FTTH deployment.
Network Security
ACL implementation, NAT/PAT rules, firewall policies and access protection.
One Sky Communications Limited
72 Classes Practical Industrial Training Program Focused on Networking, ISP & IT Infrastructure
Training Provider
One Sky Communications Limited
Lab Environment
Core Technical Competencies
Hands-on skills developed through real-world ISP infrastructure and enterprise networking training.
Networking Fundamentals
Built practical expertise in TCP/IP networking, subnetting, Layer 2 & Layer 3 switching, routing concepts and structured network troubleshooting.
Cisco Enterprise Networking
Configured Cisco enterprise networks including VLANs, Inter-VLAN Routing, STP, EtherChannel, OSPF, ACLs and secure network access.
MikroTik RouterOS
Deployed MikroTik RouterOS services including PPPoE, Hotspot, Firewall, QoS, Queue Management and VPN connectivity.
GPON & Fiber Technology
Worked with GPON infrastructure, OLT/ONU provisioning, optical power measurement and FTTH deployment procedures.
ISP Operation & NOC
Gained operational experience in ISP monitoring, bandwidth management, customer support workflows and Network Operations Center (NOC) activities.
System Administration
Performed Windows system administration, hardware diagnostics, software deployment and enterprise technical support.
Hands-On Practical Experience
Featured Projects
Implemented Network Infrastructures, ISP Servers & Security Frameworks.
[Cisco LAN]
Core Switch ↔ VLAN 10/20/30 ↔ OSPF Router
1. Corporate LAN Design
Multi-floor corporate LAN with VLAN segmentations, Inter-VLAN routing, Rapid Spanning Tree Protocol (RSTP) for loop prevention, and EtherChannel link bundling.
[MikroTik PPPoE ISP Server]
PPPoE Server ↔ PCQ Queue ↔ Radius Sync
2. MikroTik PPPoE ISP Server
Full MikroTik PPPoE access server deployment with automated profile bandwidth queues, PCQ fair sharing, and user profile management.
[GPON OLT Configuration]
OLT PON Port -> Optical Splitter 1:32 -> ONU
3. GPON FTTH Architecture
Optical access network provisioning with GPON OLT, registering subscriber ONU devices, optical loss budget calculation, and VLAN assignment per PON port.
[Network Monitoring System]
Router/Switch SNMP ↔ Zabbix ↔ Traffic Graphs
4. SNMP Monitoring Dashboard
SNMP-based centralized NOC dashboard monitoring live interface traffic, device CPU loads, latency spikes, and sending instant automated uptime alerts.
[VPN Remote Access]
Remote User ↔ L2TP/WireGuard ↔ Branch LAN
5. Secure Remote Access VPN
Encrypted Site-to-Site and client-to-site VPN solution using WireGuard and L2TP/IPsec for secure remote employee access to internal company servers.
[Firewall Security System]
Access Control Lists (ACLs) & Anti-DDoS
6. Infrastructure Firewall Edge
Multi-layer network security firewall implementing Cisco Extended ACLs and MikroTik Filter rules to block unauthorized probes, SYN floods, and brute-force attacks.
Practical Experience
Real-world ISP deployment and live Network Engineering operations.
Junior Network Engineer (Trainee)
One Sky Communications Limited
Managed live core network simulation environments, optimized active fiber-to-the-home (FTTH) distribution architectures, and contributed to resolving network disruptions within a highly responsive Network Operations Center (NOC) framework.
Core Engineering Responsibilities Handled:
Certifications & Training
Formal validations of technical capabilities and industrial training tracks.
Industrial Attachment Certificate
One Sky Communications Ltd.
Official commercial training credential validating competencies across routing matrices, loop preventions, and active GPON alignments.
Cisco CCNA Preparation
Cisco Networking Track
Rigorous architectural study tracking network topologies, IPv4/IPv6 address allocations, subnet boundaries, and link aggregations.
MikroTik MTCNA Preparation
MikroTik RouterOS Track
Technical syllabus mastery covering explicit interface allocations, queue management tree configurations, NAT, and WinBox administration.
Contact Mostafa Raihan
Available for NOC, Network Engineer, and ISP System Administration Roles.