Network Security L3 @ CSS corp

Job Location: Ambit IT Park, Chennai
Technical skills:
Hands on trouble shooting experience in any Firewall.
In-depth knowledge and practical understanding of Networking concepts OSI, TCP and IP related L3 protocols (DNS, DHCP, IP, ARP, ICMP, TCP, UDP, SNMP, FTP, TFTP).
Good understanding of Ethernet, PPP, PPPoE, PPPoA and other WAN technologies.
Proven experience with data networks including physical layer infrastructure, servers, LAN/WAN hardware, software, data transmission facilities and interconnecting devices.
Ability to understand and troubleshoot various network problems using utilities like nslookup, traceroute, ping, net stat and packet sniffers like wire shark, tcp dump etc.
Solid understanding and troubleshooting skills in IPSec VPN technologies, Clustering and High Availablity (HA) concepts.

Good Practical experience in understating and troubleshooting Network Security and related technologies, Firewalls, access and perimeter control, vulnerability management and intrusion detection.
Should have a strong knowledge on various attacks like SYN flood, Replay attacks etc and the mitigation techniques.
Basic understanding of bridging and switching concepts.
Roles and Responsibilities:

Troubleshoot/Diagnose network issues escalated from the L1/L2 engineers and driving satisfactory resolution of the issues.
Ensure consistent customer satisfaction.
Interact with international customers.