Ashish Kumar
Ashish Kumar
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Ashish Kumar
I build reliable IT infrastructure, network solutions and self-hosted lab environments
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Building reliable infrastructure, one system at a time.

IT Engineer with 7+ years of hands-on IT experience, focused on network operations, system administration, firewall security, virtualization, monitoring, and infrastructure troubleshooting. I work with Cisco and Huawei networking, Linux servers, Proxmox, OPNsense, FreeRADIUS, Pi-hole, Observium, and GPON/ISP environments, while continuously building and testing solutions in my self-hosted lab.
AK
IT Engineer • Network • Infrastructure
Networking & Switching •Cisco & Huawei •Firewall & Network Security •Linux Server Administration •Proxmox Virtualization •OPNsense •FreeRADIUS •Observium / SNMP Monitoring •GPON / ISP Networking •VLAN / STP / MSTP •Pi-hole / DNS •GenieACS / TR-069 •Cloudflare / DNS •Docker & Self-Hosting •Networking & Switching •Cisco & Huawei •Firewall & Network Security •Linux Server Administration •Proxmox Virtualization •OPNsense •FreeRADIUS •Observium / SNMP Monitoring •GPON / ISP Networking •VLAN / STP / MSTP •Pi-hole / DNS •GenieACS / TR-069 •Cloudflare / DNS •Docker & Self-Hosting •
Networking & Switching •Cisco & Huawei •Firewall & Network Security •Linux Server Administration •Proxmox Virtualization •OPNsense •FreeRADIUS •Observium / SNMP Monitoring •GPON / ISP Networking •VLAN / STP / MSTP •Pi-hole / DNS •GenieACS / TR-069 •Cloudflare / DNS •Docker & Self-Hosting •Networking & Switching •Cisco & Huawei •Firewall & Network Security •Linux Server Administration •Proxmox Virtualization •OPNsense •FreeRADIUS •Observium / SNMP Monitoring •GPON / ISP Networking •VLAN / STP / MSTP •Pi-hole / DNS •GenieACS / TR-069 •Cloudflare / DNS •Docker & Self-Hosting •
Networking & Switching •Cisco & Huawei •Firewall & Network Security •Linux Server Administration •Proxmox Virtualization •OPNsense •FreeRADIUS •Observium / SNMP Monitoring •GPON / ISP Networking •VLAN / STP / MSTP •Pi-hole / DNS •GenieACS / TR-069 •Cloudflare / DNS •Docker & Self-Hosting •Networking & Switching •Cisco & Huawei •Firewall & Network Security •Linux Server Administration •Proxmox Virtualization •OPNsense •FreeRADIUS •Observium / SNMP Monitoring •GPON / ISP Networking •VLAN / STP / MSTP •Pi-hole / DNS •GenieACS / TR-069 •Cloudflare / DNS •Docker & Self-Hosting •

Selected
works

Proxmox Homelab Infrastructure

A self-hosted virtualization lab built around Proxmox for running and testing infrastructure services. The environment is used for virtualization, Linux administration, network segmentation, firewalling, monitoring, and service deployment.

Enterprise Homelab
Proxmox Homelab Infrastructure

OPNsense Firewall Lab

A virtual OPNsense firewall lab used for routing, NAT, DNS, VPN, traffic control, network segmentation, monitoring, and secure gateway testing.

OPNsense Firewall Lab

Observium Network Monitoring

A network monitoring environment using Observium and SNMP for device discovery, interface monitoring, availability tracking, traffic graphs, alerts, and infrastructure visibility.

Observium Network Monitoring

FreeRADIUS Authentication Lab

A FreeRADIUS-based authentication lab for centralized AAA and network access testing across Wi-Fi, switches, routers, VPN, and firewall environments.

FreeRADIUS Authentication Lab

Pi-hole DNS Infrastructure

A Pi-hole based DNS infrastructure for network-wide DNS filtering, local name resolution, and centralized DNS management.

Pi-hole DNS Infrastructure

GenieACS / GPON Management Lab

A GenieACS TR-069 Auto Configuration Server lab for GPON/ONT management, provisioning, configuration, firmware operations, monitoring, and troubleshooting across OLT, splitter, ONT, and customer LAN environments.

GenieACS / GPON Management Lab

Here's how
I can help you

Network Troubleshooting

L2/L3 troubleshooting, VLANs, switching, STP/MSTP, connectivity faults, and structured incident resolution.

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Discuss the project
Discuss the project

Firewall & Network Security

Firewall configuration, NAT, routing, access control, secure remote access, and practical network security lab design.

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Discuss the project
Discuss the project

Linux & Server Administration

Linux server deployment, service configuration, troubleshooting, DNS, authentication, monitoring, and self-hosted infrastructure.

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Discuss the project
Discuss the project

Virtualization & Homelab

Proxmox-based virtualization, network lab design, service isolation, and testing of enterprise-style infrastructure at home.

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Discuss the project
Discuss the project
Discuss the project

Experience
History

01
L2 Network Engineer
02, 2026 - 06, 2026
Ultranet Syberspace Pvt. Ltd.Delhi, India

Worked in an L2 support role handling network and infrastructure operations, incident troubleshooting, service restoration, and escalation support in a high-availability ISP/IT environment.

  • Provided L2 troubleshooting for network connectivity and infrastructure issues
  • Worked with VLANs, Layer 2 switching, and network service restoration
  • Supported incident handling, complaint resolution, and escalation workflows
  • Coordinated with field and service teams to restore links and customer services
02
IT / Network Support Engineer
01, 2019 - 01, 2026
IT & Network Engineering ExperienceIndia

Hands-on experience across desktop support, networking, system administration, Linux, virtualization, and security operations.

  • Supported end users, systems, LAN/WAN connectivity, and infrastructure troubleshooting
  • Worked with Cisco/Huawei switching, VLANs, STP/MSTP, routing, and network diagnostics
  • Managed Linux and virtualization environments for lab and infrastructure workloads

Interested in talking,
let’s do it.

Get in touch
Delhi, India