Certified Linux Professional with 6 years of experience in managing, securing, and optimizing Linux environments. Specializing in VoIP/Asterisk systems, I provide complete solutions for businesses looking to implement or maintain robust voice-over-IP infrastructures. My skills range from Linux server administration, VPN configuration, and network security, to VoIP system design and Asterisk deployment.
With my extensive experience in deploying and managing VoIP systems, I help clients set up scalable, secure, and high-performing communication platforms tailored to their specific needs. Whether you need assistance with troubleshooting, optimizing your VoIP infrastructure, or enhancing your system security, I am here to help.
Core Expertise Includes:
✔️Linux System Administration (Red Hat, Ubuntu, Alma, Rocky, Debian)
✔️VoIP System Design and Implementation (VIcidial, Asterisk, FreePBX, Elastix)
✔️Asterisk Configuration, Management, and Troubleshooting
✔️VPN Configuration and Security (OpenVPN, IPsec, WireGuard,PPTPD, VPN tunnel)
✔️Network Security (Firewall, IDS/IPS, Server Hardening)
✔️Monitoring and Optimizing Linux Servers resources.
✔️Backup, Disaster Recovery, and Failover Solutions
✔️Mysql installation and troubleshooting.
✔️Web servers ( apache2 & nginx)
With my extensive experience, I am ready to help you set up, secure, and maintain a reliable communication platform. Let's work together to take your business to the next level!
Ready to get started?
Contact me now, and let’s discuss how I can help your business thrive through expert Linux and VoIP solutions tailored to your needs!
Apache HTTP Server
System Administration
Security Management
Red Hat Enterprise Linux
VICIDIAL
VPN
Zabbix
MySQL
Security Patch Installation
Linux System Administration
OS Security
VoIP Software
Call Center Software
Abubakar A.
Lahore, Pakistan
$40/hr
5.0
3 jobs
Are you looking for a reliable System Administrator or IT Admin who can keep your system, servers, cloud infrastructure, APIs, ERP, users, security, backups, and business systems running smoothly?
I help businesses manage, secure, monitor, troubleshoot, and optimize their IT infrastructure across AWS, GCP, Azure, Linux, Windows Server, Microsoft 365, Google Workspace, and DevOps environments.
With over a decade of hands-on experience in system administration, IT support, cloud infrastructure, and DevOps operations, I have supported international clients across healthcare, e-commerce, finance, logistics, and telecom. My focus is simple: keep your systems stable, secure, fast, and available with minimum downtime.
What I can help you with:
System Administration & IT Support
Windows Server administration
Active Directory, DNS, DHCP, Group Policy
File Server, Print Server, user permissions, shared drives
Linux server administration: Ubuntu, CentOS, RHEL
Server setup, patching, monitoring, troubleshooting
Remote support using RDP, SSH, VPN, and secure access tools
AWS Cloud Administration
EC2, S3, RDS, IAM, Lambda, CloudWatch, Route 53
AWS backup, monitoring, security, and cost optimization
Server migration to AWS
Secure IAM policies and access management
CloudFormation and infrastructure automation
GCP Cloud Administration
Google Cloud VM setup and management
Cloud Storage, networking, firewall rules, IAM
Monitoring, security, backup, and performance optimization
Migration from on-premises or other cloud platforms to GCP
Microsoft 365 & Google Workspace
Microsoft 365 admin, Exchange, Teams, SharePoint, OneDrive
Intune, user management, security policies
Google Workspace admin, Gmail, Drive, Calendar, user accounts
Email setup, DNS records, SPF, DKIM, DMARC
DevOps & Automation
Docker, Kubernetes, Terraform, Ansible
GitHub Actions, Jenkins, Azure DevOps CI/CD
Automated deployment pipelines
Infrastructure as Code
n8n, Zapier, Power Automate, OpenAI, Claude Code
Security, Backup & Monitoring
Firewall configuration, VPN setup, SSL/TLS
IAM, RBAC, patch management, security hardening
Prometheus, Grafana, CloudWatch, Azure Monitor, Datadog
Backup and disaster recovery planning
Server performance monitoring and incident response
Why clients work with me:
Over a decade of IT and cloud administration experience
Fast response time
Clear communication
Reliable troubleshooting
Detailed reporting
Secure and scalable solutions
Strong focus on uptime and business continuity
Available for urgent support, long-term IT management, and cloud projects
Whether you need help fixing a server issue, managing AWS or GCP, setting up Microsoft 365, securing your infrastructure, automating deployments, or migrating to the cloud, I can help you get it done professionally.
Let’s keep your systems secure, stable, and running without interruption.
System Administration
Amazon Web Services
Google Cloud Platform
Microsoft Azure
Linux System Administration
Windows Server
Network Administration
Terraform
Kubernetes
Docker
Docker Compose
CI/CD
IT Support
Database Administration
Cloud Migration
DevOps Engineering
Amazon Bedrock
Vector Database
Network File System Administration
AI Agent Development
Sher K.
Lahore, Pakistan
$36/hr
5.0
24 jobs
I architect, secure, and optimize production cloud infrastructure for businesses that can't afford downtime.
With 20+ years managing enterprise Linux systems and AWS environments, I deliver reliability, security, and cost optimization—not just technical fixes.
What I deliver:
☁️ Cloud Infrastructure
- AWS architecture design (EC2, RDS, VPC, S3, Route53)
- Cloud migration with zero downtime
- Auto-scaling and high-availability setups
- Cost optimization (20-40% savings guaranteed)
🔒 Security & Compliance
- Zero-trust architecture implementation
- Intrusion detection and incident response
- CIS benchmarks, SOC2, HIPAA compliance
- SSL/TLS, PKI, and certificate management
🐧 Linux Systems
- Ubuntu, Debian, RHEL, AlmaLinux production environments
- Performance tuning for high-traffic applications
- Disaster recovery and business continuity
- Automation with Ansible and custom scripts
📧 Email Infrastructure (Specialized)
- Postfix, Dovecot, Exim architecture
- SPF, DKIM, DMARC for 100% deliverability
- Migration from legacy systems with zero data loss
Why clients hire me:
✅ 20+ years hands-on production experience
✅ Master's degree in Cybernetics (Computer Sciences)
✅ Microsoft Certified Professional
✅ 100% Job Success Score
✅ I fix problems permanently—no band-aids
How I work:
1. Deep root-cause analysis
2. Clear, jargon-free communication
3. Production-safe changes with minimal disruption
4. Complete documentation of every change
Recent wins:
- Recovered hacked production servers for a fintech company—restored operations within 2 hours
- Migrated 500+ user email system to AWS with 40% cost reduction
- Architected HIPAA-compliant infrastructure for a healthcare startup
Send me your infrastructure challenge. I'll diagnose it and give you a solution plan—before you commit to anything.
AWS Cloud9
Linux System Administration
Security Infrastructure
eConserve Software Incident Management
DevOps
System Automation
Email Automation
Postfix SMTP Server
Dovecot
Disaster Recovery Plan
Cloud Security
Google Cloud Platform
CloudLinux
Cloud Migration
HIPAA
Red Hat Enterprise Linux
Linux Professional Institute
Email System
Email Security
Server Virtualization
Abdul R.
Lahore, Pakistan
$20/hr
4.9
33 jobs
Network and Cloud Systems Administrator with 5+ years of experience in IT infrastructure. Proficient in: | Networking & Security | Linux & Windows Servers | Hypervisors | AWS& Azure | M365 |Storage Solution
Here is a detailed breakdown of my technical expertise:
Infrastructure & Networking
Networking: I have extensive experience with L2/L3 Switches from vendors like Cisco and Huawei, as well as other managed and unmanaged switches.
Firewalls: My security expertise includes working with a wide range of firewall solutions from Cisco, Palo Alto, FortiGate, Huawei, Mikrotik, and Sophos.
Wireless: I'm proficient in deploying and managing Wi-Fi solutions from Ubiquiti (UniFi), Ruckus, TP-Link, and Tenda.
VPNs: My skills extend to implementing secure remote access using OpenVPN, WireGuard, and Cisco AnyConnect.
Network Monitoring: I use industry-standard tools like Zabbix, Nagios, Checkmk, Cacti, and Solaris to ensure network health and performance.
Systems & Virtualization
Microsoft: I have a strong background in Windows Servers, Active Directory, Office 365, Azure AD, SharePoint, Exchange Online, and Teams.
Linux: My Linux administration skills cover a variety of distributions, including Red Hat, Debian, SUSE, Kali Linux, CentOS, Ubuntu, and Fedora.
Virtualization: I am an expert in virtualization technologies, including VMware vSphere, Hyper-V, Proxmox VE, Citrix Xen, and XCP-ng.
Containerization: I am proficient in Docker, Kubernetes, and OpenShift for modern application deployment.
Storage Solutions: I have hands-on experience with Synology NAS, SAN, Unraid, and TrueNAS.
Mail Servers: My skills in email management include working with MS Exchange, Modoboa, Postfix, and Dovecot.
Cloud & Security
Cloud Computing: I am well-versed in cloud services, including SaaS, PaaS, and IaaS, and have practical experience with AWS, Azure, Hetzner, and Contabo.
Endpoint Protection: My security skills include managing endpoint protection solutions like EDR, XDR, CrowdStrike, Falcon Sensor, Vipre, and ESET.
SIEM Solutions: I have experience with Wazuh and Splunk for security information and event management.
Applications & Tools
Linux Applications: I have a strong command of common Linux applications such as Nginx, Apache, Gitlab, dhcpd, Bind9, and PowerDNS.
Ticketing Systems: I'm proficient in using ticketing and project management tools like Redmine and Jira.
VoIP: My experience includes working with VoIP platforms such as Vicidial and Issabel.
Linux
Windows Server
Amazon Web Services
Office 365
System Administration
Network Administration
Firewall
Remote IT Management
Virtualization
Proxmox VE
Docker
Network Engineering
Cloud Management
IT Support
VPN
Laiba M.
Lahore, Pakistan
$10/hr
5.0
1 jobs
Network and Cloud Systems Administrator with 3+ years of experience in IT infrastructure. Proficient in: | Networking & Security | Linux & Windows Servers | Hypervisors | AWS& Azure | M365 |Storage Solution
Here is a detailed breakdown of my technical expertise:
Infrastructure & Networking
Networking: I have extensive experience with L2/L3 Switches from vendors like Cisco and Huawei, as well as other managed and unmanaged switches.
Firewalls: My security expertise includes working with a wide range of firewall solutions from Cisco, Palo Alto, FortiGate, Huawei, Mikrotik, pfsense and OPNsense.
Wireless: I'm proficient in deploying and managing Wi-Fi solutions from Ubiquiti (UniFi), Ruckus, TP-Link, and Tenda.
VPNs: My skills extend to implementing secure remote access using OpenVPN, WireGuard, and Cisco AnyConnect.
Network Monitoring: I use industry-standard tools like Zabbix, Nagios, and Checkmk to ensure network health and performance.
Systems & Virtualization
Microsoft: I have a strong background in Windows Servers, Active Directory, Office 365, Azure AD, SharePoint, Exchange Online, and Teams.
Linux: My Linux administration skills cover a variety of distributions, including Red Hat, Debian, Kali Linux, CentOS, and Ubuntu.
Virtualization: I am an expert in virtualization technologies, including VMware vSphere, Hyper-V, VMware esxi and Proxmox VE.
Storage Solutions: I have hands-on experience with Synology NAS, SAN and Unraid.
Cloud & Security
Cloud Computing: I am well-versed in cloud services, including SaaS, PaaS, and IaaS, and have practical experience with AWS and Azure.
Endpoint Protection: My security skills include managing endpoint protection solutions like CrowdStrike, Falcon Sensor and Vipre.
SIEM Solutions: I have experience with Wazuh.
Applications & Tools
Ticketing Systems: I'm proficient in using ticketing and project management tools like Redmine.
VoIP: My experience includes working with VoIP platforms such as Zapier and Free-pbx.
Computer Network
System Administration
Cloud Computing
Microsoft Azure
AWS Cloud9
Microsoft Windows
Ubuntu
Server & Virtualization Software
Software Architecture
Infrastructure Management
VoIP Administration
VMware ESX Server
Proxmox VE
PfSense
MikroTik
Asim Y.
Lahore, Pakistan
$17/hr
5.0
73 jobs
I can work on asterisk,voipswitch,vpn,gsm gateways , linux, php, mysql.
Linux
FreePBX
cPanel
A2Billing
FreeSWITCH
VoIP Administration
VICIDIAL
Session Initiation Protocol
VPN
Asterisk
MySQL
WebRTC
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