Alexey N.

Linux\Cisco systems and network administration are my primary interests. I have extensive experience with multiple UNIX-based operating systems with an emphasis on Linux, (Debian Linux), but also FreeBSD and Windows system, Cisco networking hardware, system and network security, network design. I have experience with high traffic networking including load balancing technology. I use Perl and Shell scripting on a regular basis for system administration tasks. Over 14 years of general computer experience. Now I manage a network of the big company, over then 400 computers in general office and about 3 branch offices in 3 region of the Ukraine, I provide a mail, web, all telecommunication, security and more others services. Operating Systems: 14 years Linux (Debian, Redhat and others) 14 years *BSD (FreeBSD, BSDI) 10 years Cisco IOS Windows server system AD and more Networking: Complete understanding of TCP/IP, UDP, ICMP Network routing protocol OSPF, RIP, BGP,IGRP and more Network troubleshooting Physical network maintenance and upgrades Cisco switch and router configuration All popular network protocols (DHCP, SMTP, POP, SNMP and more) Load Balancing on cisco and unix based routers Network analyst and statistic Security: Advanced knowledge of Unix security Secure internet services LAN/WAN security, VPN Firewalls (IPtables, IPFilter, Cisco IOS access lists) Encryption (PGP, GnuPG, SSL) SSH (SSH v1, v2 and OpenSSH) Host-based security: OS hardening, disabling or encrypting unsafe network services Security Policy Design, Implementation Network/Host Security Auditing Software: Apache HTTP/HTTPS servers DNS (BIND 8/9) Vi, and ViM NFS NTP, ntpdate POP, IMAP, IMAPS PPP SMTP (Postfix, Sendmail, procmail) Samba Cisco IOS (11.0, 12 .0) and more else ... Programming/Scripting: Intermediate level, mostly systems automation and maintenance tasks Perl5 (console scripting) Shell scripting Specialties: Network system administrator