My name is Marcus V. de Sa Alvares, I'm 25 years old and have a degree in Telecommunications Engineering. I have been working as a Network Administrator for the last 3 years. Mostly with Linux and FreeBSD, but also with Windows 2003 server. I'm responsible for the administration of a Metropolitan Area Network with approximately 250 servers. To operate that I've became very familiar with many Network Management tools like Nagios, MRTG, Cacti and Ntop. I've also developed many Bash-scripts to do some custom work with Iptraf, RRDtool and SNMP.

    I have high experience with iproute2 (Linux Advanced Routing & Traffic Control) and I’m also very familiar with TCP/IP traffic analyzing and tools such as Iptraf and Tcpdump. The experience with those tools, gave me the chance to study and to know better many network protocols and technologies, such as SMTP, SNMP, DNS, HTTP, FTP, ICMP, POP3, IMAP, etc. It also gave the skill for trouble-shooting and diagnostic many network problems. Many of those problems could be solved by applying some firewall rules.Over the years, I've acquired quite a lot of Iptables (packet filter) knowledge building some custom firewalls.

    I also managed and migrated a Qmail (MTA) Server. During the server migration, I studied and implemented some anti-SPAM/virus techniques and tools such as SPF, DCC and Pyzor. After the migration, I made some scripts to organize the server logs and collect some important data about SPAM, Virus, and domain/user statistics. The data was used latter as an input to JPGraph and RRDtool.

    Some others IT Administration that I experienced are: building Web (Apache) and DNS (Bind) Servers, Proxy with Squid, Software RAID under Linux, VPN communication and High-Availability Clusters using the Linux Heartbeat tool. I also have experience with Digital and Cisco Routers and 3Com Switches.

Proffessional Statement

    The basic goal of my research is to work in the network service area in sectors linked to the Internet with emphasis in security and management.  I have a special interest for network security, GNU/Linux or BSD systems and open source software.

January 2002 – August 2006: Novo Milenio College School, Vila Velha - ES, Brazil -
Telecommunications Engineering.

December 2001: Centro Educacional Charles Darwin School, Vitoria – ES, Brazil –
Finished High School.

Primary Focus:	WAN Infrastructure Design, Network Management and Implementation using Unix Systems.
Operating Systems:	GNU/Linux (2.4 , 2.6) and BSD systems (FreeBSD, OpenBSD...)
Languages:	Bourne & Korn shell script, awk, sed, C, SQL.

• Routers: Cisco, Digital and Linux based (Advanced Routing & Traffic Control - iproute2);

• Wireless APs (802.11a/b/g): Orinoco, Lucent, Atheros, Linksys, D-Link;

• Software: Nagios, MRTG, Cacti, Net-SNMP, Network Weather Map, Qmail, Bind, Apache, Squid, Heartbeat, OpenSSH/SSL, Microsoft IIS, MySQL, PostgreSQL, etc;

• Security: Iptables Packet filter; WEP and WPA Cryptography (wireless); Ettercap, tcpdump and wireshark traffic analyzing tools.

• Protocols: TCP/IP, WCCP, SNMP, DNS, SMTP, POP3, IMAP, HTTP, FTP, etc.

Work History:

    Intervip Informatica Ltda. - Intervip is a Brazilian ISP. I work as a Network Administrator for 2 years now. There are more than 200 Linux servers acting as routers to manage. I got a great experience and knowledge with TCP/IP, firewalls, security and many different protocols. There are also many Linux Servers such as DNS (Bind), HTTP (Apache), Proxy (Squid) and SMTP (Qmail). I've developed many Bash-scripts to do some custom automated jobs and perform the integration of some separated network management tools. The administration of the network is done with software such as Nagios, Cacti, Ntop, Iptraf and tcpdump.

    Prodest – Network Center of the State of Espirito Santo. I worked as a trainee for 4 months on Prodest developing some custom Network Management tools. My research was focused on tools like Network Weather Map and RRDTool. The idea of managing the network with different graphs makes it easier to see any abnormality on the patterns and diagnostic where the problem is. I was part of a project witch goal was to plot the packets accounting of Iptables and use it as an input for a script that integrate RRDtool and Network Weather Map.