Çağrı Sevinç

Build-up 58 Site-to -Site IPSEC VPN tunnels between branch office’s Cisco routers and center’s Fortigate firewalls. Analyse the debug logs for solving issues and update the configurations on both ends. Adjust Fortigate 100D&200F firewall objects and policies. Enable SSL-VPN clients. Replace Cisco backbone routers with Palo Alto NGFW and configure them with the proper rules existed. Enhance log management capabilities and investigate offenses, events and flows with IBM Security QRadar SIEM.

Implemented advanced log collector installations for power plant components. Proactively monitored and investigated daily alerts from remote facilities, conducting thorough log and event analysis of multiple ICS components. Created security tickets through Footprints. Executed comprehensive log analysis using cutting-edge tools such as Elastic Stack (ELK). Established IPSEC tunnels and RDP connections. Configured ICS firewalls, network components by ensuring a multi-layered defence.

Implemented new VPLS, MPLS or TDM lines in corporation with ISP. Deployed mostly Cisco routers and switches for diverse aviation systems. Optimized IP connectivity between more than 50 radar & voice stations nationwide and hub center by setting GRE tunnels. Configured different network technologies such as HSRP, VRRP, Access Lists, VLANs, STP on Cisco devices. Spearheaded comprehensive monitoring of LAN and WAN connections via SolarWinds and Cisco Prime.