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Cisco Computer Security Linux Network Administration System Admin
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A.K.M. Tohidur R.

@touhidecevw

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5.0
167

6.9

6.9

99%

Network & System Specialist|CCNP|Fortinet|RHCE|CEH

$60 USD / Hour

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Bangladesh (12:45 PM)

Joined on May 23, 2011

4 Recommendations

$60 USD / Hour

✅As a highly skilled and experienced network and system administrator with over 11 years of expertise, I hold notable certifications such as CCNP, CCNA, RHCE, and Certified Ethical Hacker (CEH) . I have established myself as an accomplished network, system, and security engineer, capable of delivering complete solutions for designing, configuring, automating, and managing network and system projects. My proficiency in using simulation software such as Packet Tracer and GNS3, as well as real-life network and system devices, make me a valuable asset for any project. My few hands-on experiences is : ✅Network Design by MS Visio, Cisco packet tracer, GNS3, and EVE-NG ✅Netacad CCNA and CCNP packet tracer Labs activities, projects design and solution ✅Cisco routers, switches, FTD, FMC, and ASA firewalls. ✅WatchGuard, Palo Alto, CheckPoint Firewall, SonicWall, Fortigate, pfSense, OPNsense, Huawei firewalls. ✅Unifi Enterprise Fortress Gateway, Ubiquiti UDM Pro, Unifi Cloudkey, USG UniFi Firewall , Security Gateway, Switch, and AP devices ✅ Netgear, Huawei, Aruba switch, DrayTek router, TP-Link and others vendor wireless router configurations. ✅Cisco, Tp-Link, Aruba, Fortinet, Ubiquiti, Planet, Huwei switch configurations. ✅MikroTik Routers and switch configuration ✅ SNMP monitoring configuration: Observium, Librenms, Cacti, Nagios core ✅ Cloud Administrator: Azure, AMAZON AWS , Google GCP, OVH Cloud and Digital Ocean, Contabo ✅Hyper-V, VMware ESXi, VMware Workstation, VirtualBox, KVM, and Proxmox. ✅Ubuntu, Red Hat, CentOS, Debian, openSUSE, and Kali Linux distributions. ✅Windows server administration , Active Directory management, Exchange Server administration, DNS configuration ✅Servers: HP Proliant Servers, Dell/EMC Servers, IBM ✅VLSM/subnetting of small to large enterprises ✅VLANs, Inter-VLAN routing, VTP, CDP, Ether-Channel(LACP, PAGP) ✅DHCP, NAT/PAT configuration and IP helper address ✅static and Dynamic Routing protocols (RIP, OSPF, EIGRP, BGP) configuration ✅Layer-3 Redudent/backup links Using HSRP, VRRP ✅Port security, ACL( access list) configuration ✅Network troubleshooting and optimization ✅VPN Configuration Expert (GRE , SSL, IPSEC, PPTP, OpenVPN & DMVPN) ✅Network automation script for any Cisco and FortiGate devices using python ✅Overlay Networks VPN Expertise: Proficient in configuring and managing various overlay network VPNs, including ZeroTier, Tailscale, WireGuard, SoftEther VPN, Netbird , Netmaker, OpenVPN Cloud, I, Twingate and PeerVPN for secure, scalable, and decentralized networking, enabling seamless remote access, team collaboration, and encrypted communications across distributed systems. ✅Cisco Duo: MFA, 2FA, SSO, Identity Security Integration, Windows Logon, RDP, Microsoft AD, VPN Authentication.

Verifications

On time

98%

On budget

92%

Accept rate

89%

Repeat hire rate

10%

Portfolio

Portfolio

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5.0 · 167 Reviews
Reviews
N

Fix VPS VPN and Secure VNC tunnel €40 EUR

He is very professional, knows how to listen and understand your needs and offer you the best option. I have worked with him several times. 10/10

Adrian M.

@nairdao1

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Murcia, Spain

20 days ago

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N

NordLayer IP Camera VPN Setup $130 USD

Excellent job. The way I had in mind did not work but Tohidur came up with a solution, implemented very quickly and it solved my network problems. Will use again!

Nick R.

@nickrowley

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Warwick, United Kingdom

27 days ago

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Virtualizor KVM Server Setup ₹3,050 INR

I am happy with the work done by Tohidur. Thanks.

Aman D.

@amandhanda

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Noida, India

30 days ago

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C

Fix Windows 11 Share Credentials $40 USD

Thank you for your great support!

Ross L.

@cybervision7

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Surrey, Canada

1 month ago

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Resolve Outlook Configuration for Hostinger Email ₹1,200 INR

He was very quick with availability, finished the work on time and is very reliable.

Mufeez M.

@MufeezM

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Dubai, United Arab Emirates

1 month ago

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Experience

Assistant Manager(ICT)

Jun, 2021 - Present

4 years, 5 months

Power Sector

Jun, 2021 - Present

4 years, 5 months

Currently Working as System, Network, and System Administrator in charge of the infrastructure, virtual & Physical server, and a firewall. Main key responsibilities include network configuration, troubleshooting, virtualization, server management, system administration, and strategic planning. Hand-on experience: 1. Wide range of Cisco Routers, Switch, & Next Generation Network 2. Security administration (Fortgate and CISCO ASA, firewall configuration, customization, and troubleshooting), etc.

Jun, 2021 - Present

4 years, 5 months

Network Engineer

Nov, 2019 - Jun, 2021

1 year, 7 months

IDLC Finance Limited

Nov, 2019 - Jun, 2021

1 year, 7 months

Hands-On experience : 1. Extensive experience with Fortinet Security Fabric, including FortiGate Firewall, FortiGate VM virtualization, FortiAnalyzer, FortiClient, and FortiClient EMS. 2. Skilled in configuring and maintaining network devices such as Cisco, Mikrotik & Juniper Routers, and Nesux & Catalyst Switches. 3. Experienced in monitoring network performance, troubleshooting problems, and scheduling upgrades to optimize network performance

Nov, 2019 - Jun, 2021

1 year, 7 months

Network System Administrator

May, 2018 - Oct, 2019

1 year, 5 months

BRACNet Limited

May, 2018 - Oct, 2019

1 year, 5 months

1. Configuration, troubleshooting & monitoring of IP network a. Setting up Cisco routers and switches b. Routing protocols (OSPF, EIGRP, BGP) configuration c.Network security and firewall setup 2. Responsible for planning, designing, and implementing IP networks for corporate clients 3. Responsible for advanced enterprise wireless solutions using a wide range of wireless routers and access points

May, 2018 - Oct, 2019

1 year, 5 months

Education

Jahangirnagar University

2019 - 2020

1 year

Ms.c in Computer Science

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Bangladesh

2019 - 2020

1 year

Khulna University

2009 - 2013

4 years

B. Sc. in Electronics and Communication Engineering

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Bangladesh

2009 - 2013

4 years

Qualifications

Cisco Certified Specialist - Enterprise Core

2019

Cisco

Earners of Cisco Certified Specialist - Enterprise Core have demonstrated knowledge of implementing core enterprise network technologies including dual stack (IPv4 and IPv6) architecture, virtualization, infrastructure, network assurance, security and automation

2019

Cisco Certified Network Professional Enterprise (CCNP Enterprise)

2019

Cisco

Holders of CCNP Enterprise certification have demonstrated skills with enterprise networking solutions.

2019

Oracle Cloud Infrastructure 2019 Certified Architect Professional

2020

Oracle

An Oracle Cloud Infrastructure Certified Architect Professional has demonstrated hands-on experience and knowledge required to plan, design, implement and operate solutions on OCI. The abilities validated includes: Plan and design solutions; implement and operate solutions; Design, implement and operate databases; Design for hybrid cloud architecture; Migrate on-premises workloads to OCI; Design for Security and Compliance Up-to-date training and field experience are recommended.

2020

Publications

Target detection performance of coherent MIMO radar using Space Time Adaptive Processing.

IEEE

Multiple-input-multiple-output (MIMO) radar is advantageous for target detection, parameters identification, and target classification due to waveform diversity and perspective. By taking the benefit of spatial diversity, MIMO radar system performance can be dramatically enhanced.

Certifications

P

Preferred Freelancer Program SLA

US English - Level 1

US English

F

Foundation vWorker Member

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