r
rehan_aftab

Rehan Aftab

@rehan_aftab

Network and Security Engineer

Pakistan
Englisch
Einige Informationen werden in englischer Sprache angezeigt.
Über mich
Network and Security Engineer with hands-on experience designing, deploying, and supporting enterprise-grade infrastructure spanning routing & switching, next-generation firewalls, wireless, unified communications, and IT systems administration. Proven track record delivering high-availability network environments across multi-site industrial and corporate organizations.... Mehr lesen

Kompetenzen

r
rehan_aftab
Rehan Aftab
offline • 
Durchschnittliche Antwortzeit: 1 Stunde

Meine Dienstleistungen

Programmierung & Technik
I will configure and secure your fortigate firewall
Ab40 $ / ProjektWeitere Details
Grafik & Design
I will design your wireless network with ekahau
Ab20 $ / ProjektWeitere Details

Portfolio

Arbeitserfahrung

Corvit_Networks

Implementation Specialist

Corvit Networks • Vollzeit

Jan 2025 - Present • 1 yr 8 mos

• Network Infrastructure & Security: Design, deploy, and secure enterprise routing, switching, and multi-vendor firewall environments (Cisco ASA/FTD, Fortinet NGFW, Hillstone, H3C, Sophos), implementing IPSec/SSL VPNs, GRE, and DMVPN for secure site-to-site and remote connectivity. • SD-WAN & Multi-Site Connectivity: Configured and troubleshot SD-WAN and multi-ISP environments with site-to-site IPsec VPN tunnels linking regional and head offices for continuous business connectivity. • Wireless Infrastructure: Delivered heatmap-based wireless designs, deployments, and optimization on Cisco 9800 WLC and Huawei platforms; resolved enterprise roaming issues by implementing 802.11k/r/v and FT+802.1X, and tuned RSSI, PMF, CAC, and band-steering policies for voice and data SSIDs. • Unified Communications & Voice: Administered Grandstream and Cisco CUCM clusters (Publisher/Subscriber, firmware upgrades) and Unity Connection, engineering dial plans (partitions, CSS, route/translation patterns), SIP/MGCP voice gateways, CUBE trunks, and IVR call-handler flows for enterprise telephony. • Systems & Server Support: Supported VMware ESXi upgrade and administration tasks and Windows Server environments as part of broader IT infrastructure operations. • IT/IS Audits & Compliance: Conducted network and IT security audits, site surveys, and solution design to ensure infrastructure met organizational and regulatory compliance standards. • Operations & Troubleshooting: Provided high-availability network operations support, resolving complex issues across MGCP gateways, VTSP signaling, VPN Phase 1/2 negotiation, and AP join failures (DTLS) to minimize business downtime. • Service Level Agreements (SLAs): Leading SLA delivery, providing end-to-end technical support for VoIP infrastructure serving over 200 users. Managing and maintaining network security solutions, including Fortinet, Hillstone, and Cisco FTD firewalls. Delivering comprehensive network support by trouble