Christian
Kildau
Network Engineer
Christian Kildau is an enthusiastic network engineer, who has been working with Linux, OpenSource and networks since he was 12. He turned his passion into profession by studying “Computer Science Expert for System Engineering” and taking further training as a network engineer.
A detailed resume is available on request in German and English.
Education & Certifications
- Cisco CCNA Routing & Switching
- IHK Computer Science Expert - System Engineering
Projects
- Designing and maintaining carrier grade DDoS detection + mitigation system
Includes building NetFlow collector and analyzing NetFlow data, building responses and providing clean-pipe traffic for customers using custom built scrubbing center and negotiation with upstream Tier1 carriers for providing capacity - Designing and implementing a nation wide IP/MPLS backbone
Includes design and documentation of an ISP like IP/MPLS backbone with about 50 POPs, setting up network racks with UPS, PDU, PSU, OOB management, configuration of switches, routers, firewalls, etc. - Migrating existing IP/MPLS Network from CWDM transport technology to DWDM
Includes planning of cable routes accross towns, calculation of expected loss, needed amplification using EDFA3 amps, needed add-drop multiplexers as well as actual migration including planning of migration without customer impact where possible - Migrating an IPv4-only corporate datacenter to IPv4/IPv6 Dualstack
Includes re-configuration of hosts, setup of loadbalancers to translate between IPv6 only servers and IPv4 only users, firewall configuration, etc. - Optimising firewall concepts in a corporate datacenter
Includes migrating statefull firewalls to loadbalancers and stateless firewalls for performance and security reasons - Building hub-and-spoke corporate networks with dozens of spoke sites
Includes connecting multiple branch offices to Companies’ headquarter using MPLS and/or DMVPN, verification and troubleshooting - Building VMWare Virtualization Infrastructure + NetApp Metrocluster Storage
Includes building and maintaining storage infrastructure with NetApp MetroCluster as well as storage network and VMWare vSphere Virtualization Infrastructure and Veeam Backup Suite - Building a fully-redundant Mail system for hundreds of users including migration of old user data
Includes configuration of Postfix and Dovecot daemons, loadbalancers, replication across multiple datacenters and distributed storage
Skills
- Technologies
IPv4+IPv6, Ethernet, CWDM+DWDM, SDH, PPP, MPLS, IPSec VPN, Storage Networking - Routers
Cisco ASR9000/ASR1000/ASR920/c7200/c1900/c1800, Arista - Switches
c6500/c4500/c3850/Nexus 5000 - Firewalls
Cisco ASA, OpenBSD PF - Routing Protocols
OSPF, BGP, MPLS/LDP - Switching Protocols
RSTP, VTP, 802.1Q, QinQ, HSRP, VRRP - Network Management
DHCP, DNS (bind9+dns64), Authentication (tacacs+, Radius), FTP, TFTP - Network Monitoring
Nagios, Cacti, Zabbix - Network Documentation
Good Documentation skills using Microsoft Visio and OmniGraffle - Network Services
Mailsystems (Dovecot, Postfix), Webservers (Apache, Nginx), MySQL, OpenVPN, VoIP - Virtualization
VMWare vSphere (including Veeam Backup Suite), Linux KVM - Operating Systems
Linux (Debian, Ubuntu, SuSE, Gentoo), OpenBSD, Mac OS X, Windows Server 2012 - Storages
NetApp 7-mode + cDot
Personal Skills
- Good documentation skills
- Embracing complex tasks quickly
Hobbies & Interests
- Fitness (Weight Lifting & Jogging)
- OpenSource & Linux
- Photography
- Apple Gadgets
Languages
- German (native)
- English (business fluent)