OSPF over IPSec links
To connect several locations IPSec tunnels were used over public Internet links. Over the secure channels an OSPF hierarchy was built. The backbone are contained the main production data center and services. The main purpose of this infrastructure was providing secure remote management of those services. At the same time it was used also by office IT systems (Windows AD, MS Exchange). ABR-s were Cisco 1721 and the main data center had Cisco 6513.
Skillful network and system engineer (active CCNP certification) with good analytical, troubleshooting, and communication skills. Over 7 years' experience in configuring and maintaining highly available computer networks and network related services on Cisco devices and GNU/Linux servers. Profficient in configuring dynamic routing protocols (BGP, OSPF, EIGRP), VPN technologies (IPSec, GRE), IPv6, STP, etherchannel, VTP, VRRP, HSRP; Cisco routers and switches (IOS/CatOS), ASA appliances, GNU/Linux ditributions including Red Hat, Debian, CentOS, Fedora, Ubuntu, Slackware (iptables, openswan, racoon, openvpn, BIND, Squid, Apache, DHCP, TFTP, vsftpd, keepalived etc).