Marital Status: Married
Driving License: yes
Istanbul Technical University 2006 – 2011, Control Engineering
Skype ID: abdullah.okumus1
Network Security Expert – ADC(s) Expert
NetScaler, F5, Nginx, Cisco ACE
Checkpoint, Fortigate, Cisco ASA, Juniper, Palo Alto, Firepower
Intrusion Prevention Systems
Sourcefire, Checkpoint, Fortigate
Juniper, Cisco ASA, Checkpoint, Fortigate
Web/Email Security Gateways
Server Virtualization Infrastructures
Network/HTTP Analyzing Tools
Tufin, Cisco ISE, Vasco
Security Services Expert
2016 – Present, Istanbul, Turkey
I have worked as a security services expert at Managed Security Service Provider (MSSP) team of Vodafone Turkey.
My primary job is NetScaler Load balancing (LB) and Web Application Firewall (WAF) configuration here. HTTP, HTTPS, TCP, DNS LB are just some examples of load balancer configuration I made. In the WAF part, I created WAF profile regarding to OWASP-10 vulnerabilities for every customers who requesting HTTP Layer-7 protection to their web sites. Furthermore, designing of customer’s LB topologies is one of my LB jobs here.
Another significant job I am doing here is new customer implementation that includes installation and designing topologies of firewall. In consideration of designing topologies I have configured firewall rules for client to server connections, client’s internet connection through firewall, connections between load balancer and servers etc.
Providing post-sale support (firewall, load balancer, IPS, VPN etc.) to customers of MSSP.
Design of new customer Security topologies with firewalls and load balancers and deploy these topologies into production.
Configuration of Web Application Firewall (WAF) on NetScaler load balancers regarding OWASP-10 vulnerabilities.
Implementing DRC scenarios with NetScaler GSLB configuration
Supply with access requests by configuring firewalls such as Checkpoint, Fortigate, Cisco ASA etc.
Customer Security Services Installations & Implementation:
-Design Firewall & Load balancer topologies, installations, implementation websites on load balancer.
-Design Hotspot configuration on fortigate.
NetScaler Web Application Firewall setups:
-Initial WAF setup & support.
NetScaler MAS Integration
-MAS integration with NetScaler.
-Web Insight / Security Insight analyzes via Appflow.
NetScaler Python Integration
-Python scripts implementations on NetScaler.
Customer Security Services Migration:
-Customer migration from another ISP environment to Vodafone site and administration of their security devices such as firewall, load balancer etc.
Enterprise and End-user Services Migration:
-Separation on load balancers regarding to type of services which might be enterprise or end-user customer services and migration those services/web sites to new load balancer environments.
DNS Load balancer Migration:
-Migration from end of life/support NetScaler hardware to new generation NetScaler pair which meets whole Vodafone fixed net end user customers’ DNS requests.
IT Security Specialist
Borsa Istanbul A.S
2013 – 2016, Istanbul, Turkey
I worked as IT Security Specialist in Borsa Istanbul A.S. which is the only stock exchange firm in Turkey.
As an IT Security Specialist, I managed firewalls (Checkpoint, Cisco ASA, Fortigate etc.), load balancers (F5, NetScaler and Nginx), SSLVPN devices (Juniper, Cisco ASA) and other security devices such as Sourcefire IPS, Vasco, Websense, Tufin etc.
I was project manager of Load balancer Purchase and Implementation. It was migration job from Cisco CSS to F5. Every web sites had been running on Cisco CSS load balancer which was End of Sale and End of Support. I have set up F5 cluster and implemented those websites on F5. Also I configured F5 ASM policies for all websites such as borsaistanbul.com, ebs.borsaistanbul.com etc. ASM policies had both Web Application Firewall and DDoS Protection configuration.
Firewall configuration based on basic security approaches (rule management, network
configuration etc.), full setup
Detailed load balancer configurations regarding to institutional security policy
Checkpoint, Cisco ASA, Juniper IPsec VPN-SSL VPN configurations
Analyzing of IPS, DDoS and anti-virus devices’ reports
Trouble shooting of all security devices such as Firewall, load balancer, SSLVPN, IPS etc
Load balancer purchase & setup:
-Proof of Concept (POC), preparing technical report and specification
-Installation of F5 ADC after purchase
-Configuration of load balance, cache, compression (LTM & AAM)
-Configuration/Support WAF and GET DDoS protection (ASM) of whole websites on F5 such as borsaistanbul.com, ebs.borsaistanbul.com, bistozelpazar.com etc.
-All security devices like firewall, IPS, load balancer etc. have been moved without interruption of production systems from former datacenter to new datacenter according to weekly plan
NetScaler Load Balancer Specialist
Exclusive Network Turkey (Bilisimcim A.S.)
2011 – 2013, Istanbul, Turkey
I worked as a NetScaler Specialist in Exclusive Network which is a distributor of NetScaler in Turkey. I worked as post-sales and presales engineer at the same time.
As a post-sales engineer, my job definition was providing post-sales support on load balancer modules such as load balancing, content switching, web application firewall, geographic load balancing (GSLB), caching & compression, authentication & authorization, access gateway (SSL VPN module) etc. Also maintenance & operations such as initial setup, upgrade, new configurations etc. was in my job scale.
As a presales engineer, I made POCs (proof of concept) to potential customers about the NetScaler modules mentioned above and also gave training to the customers about these modules.
Load balancing, Application Firewall, Cache/Compression, Policy Based Security, Authentication etc.)
Preparing technical specification
Installation and startup process
Post-sales and Presales support
Made POC and initial setup for customers below.
Customers: Turk Telekom, Vodafone, Morhipo, Sahibinden, Brodage, Yapı Kredi Sigorta, Kuveytturk, Akbank, Hürriyet, Zaman, Dogan Holding, Takasbank, Aviva Sigorta, cimri.com etc.
Given post-sales support for customers below.
Customers: Turk Telekom, Vodafone, Yapı Kredi, Garanti, Akbank, Kuveytturk, Sahibinden, Morhipo, İBB, Zaman, Hürriyet, Dogan Holding, Yemeksepeti, ÖSYM etc.
Citrix Certified Associate – Networking (CCA - N), 2019
Cisco Certified Network Associate Security (CCNA Sec), 2018
Cisco Certified Network Associate (CCNA), 2018
Check Point Certified Security Expert (CCSE), 2017
Check Point Certified Security Administrator (CCSA), 2015
Citrix Certified Administrator for Citrix NetScaler (CCA), 2012
Citrix Netscaler Advanced Topics – Security, Management and Optimization (2019);
Checkpoint R80.10 Management (2018)
VMware NSX: Install, Configure, Manage [V6.2] (2017);
Citrix Netscaler Advanced Topics – Security, Management and Optimization(2017);
F5 Load balancer ASM (2015);
F5 Load balancer LTM (2015);
Cisco ASA Firewall SSL VPN (2014);
Juniper UAC (User Access Control) (2014);
Checkpoint Security Administrator (2013);
Citrix – NetScaler Administrator (2012);
Programming for Everybody – Python, University of Michigan (2017)
Istanbul Technical University
2006 – 2011
Bachelor’s degree in Control Engineering, faculty of Electricity and Electronics
Turkish – Native
English – Upper Intermediated