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Reliable servers, networks & email – engineered to last.

I’m Inder Kochar, a freelance systems & network engineer. I design, secure and support Windows and Linux infrastructure, Exchange and Postfix mail, and fast WordPress sites for businesses in India, Australia and beyond.

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  • 35+ years in IT
  • India & Australia
  • Security-first
  • Remote & on-site
20+Free engineering tools on this site
1998-2026Microsoft Windows & Exchange Server generations managed
2018–2026Postfix /Dovecot Mail Server
2018-2026Linux Server Generation Managed

What I do

End-to-end IT, from the server room to the inbox.

One engineer who understands the whole stack – so problems get solved at the root, not passed between vendors.

Servers & infrastructure

Windows Server and Ubuntu builds, Active Directory and Group Policy, DNS and DHCP, VMware and Hyper-V virtualisation, and backups you can actually restore from.

  • Windows Server
  • Active Directory
  • Ubuntu
  • VMware

Networking & security

Network design, VLANs, firewalls and VPNs, IPv6 roll-outs, SSL and hardening – so the network is fast, segmented and safe by default.

  • Firewalls
  • VPN
  • IPv6
  • Hardening

Email systems

Microsoft Exchange (2010–2019) and Linux mail with Postfix and Dovecot: deployments, migrations and deliverability with SPF, DKIM and DMARC.

  • Exchange
  • Postfix
  • Dovecot
  • DMARC

Web & WordPress engineering

Fast, secure, SEO-friendly websites on tuned LEMP servers, plus custom WordPress plugins for bookings, payroll, ticketing and more.

  • WordPress
  • Nginx
  • PHP
  • SEO

E-commerce

Online stores on WooCommerce, Shopify and Magento – secure checkout, reliable hosting and integrations that keep orders flowing.

  • WooCommerce
  • Shopify
  • Magento

Managed support

Ongoing maintenance, monitoring and remote support with a proper ticket system and agreed response times – one engineer who knows your setup.

  • Support plans
  • Remote help
  • Monitoring

Free tools

The utilities I use every day – free for you too.

Subnet calculators, config generators and mail-record checkers. They run in your browser, need no sign-up and store nothing.

All 23 tools
Network

IPv4 Subnet Calculator

Network, broadcast, usable host range, wildcard mask and binary view for any IPv4 address and CIDR prefix.

Open tool Linux

Netplan YAML Generator

Generate a correct Netplan file for a static IP or DHCP on Ubuntu 18.04 to 26.04 – with the right gateway syntax, file permissions and apply commands.

Open tool Email & DNS

SPF, DKIM & DMARC Checker

Check a domain’s MX, SPF, DMARC and DKIM records in one go, with plain-English findings and fixes for common mistakes.

Open tool Email & DNS

DNS Lookup

Look up A, AAAA, MX, TXT, NS, CNAME, SOA, CAA, SRV and PTR records for any domain or IP address.

Open tool Windows

Windows Repair Command Generator

Pick the problem – corrupt system files, update failures, network trouble, disk errors – and get the right SFC, DISM, chkdsk or netsh sequence in the right order.

Open tool Linux

Nginx Server Block Generator

Production-ready Nginx server blocks for WordPress/PHP-FPM, static sites and reverse proxies – HTTPS, HTTP/2, www redirect and security headers included.

Open tool

How I work

A clear process, with no surprises.

  1. 01

    Assess

    A review of your current setup – risks, bottlenecks and quick wins – in plain language.

  2. 02

    Design

    A documented plan with options, costs and a timeline you approve before any work starts.

  3. 03

    Build

    Careful implementation in agreed change windows, with testing and a rollback plan at every step.

  4. 04

    Support

    Hand-over documentation, monitoring and ongoing help through tickets or a support plan.

  • Windows Server
  • Active Directory
  • Group Policy
  • Exchange Server
  • Ubuntu Server
  • Postfix
  • Dovecot
  • Nginx
  • Apache
  • IIS
  • VMware
  • Hyper-V
  • DNS / DHCP
  • SPF · DKIM · DMARC
  • IPv6
  • WordPress
  • WooCommerce
  • Shopify
  • Magento
  • Acronis
Inder Kochar
Inder KocharSystems & Network Engineer

Why clients stay

Technology can be simple and powerful.

You are what you build. I design systems that are secure, efficient and scalable – and I document them so you are never locked in.

More about me →

  • Hands-on, end to end

    Hardware, operating systems, network, mail and web – one point of contact who sees how it all connects.

  • Secure by default

    Least privilege, patching, tested backups, SPF/DKIM/DMARC and hardened servers are part of every job, not extras.

  • Documented and transparent

    Clear hand-over notes, passwords in your vault and plain-English reports – your systems stay yours.

  • Two-country experience

    Projects across India and Australia, working remotely across time zones or on-site when it matters.

Guides & tips

Fixes from real support work.

All guides

Got an infrastructure headache?

Tell me what’s happening – I’ll reply within one business day with next steps, whether that’s a quick fix or a proper plan.

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