Hình đại diện của Bodyring
Cờ của Ukraine Mykolaiv, Ukraine
Làm thành viên từ Ngày 11 tháng 12 năm 2007
0 Đề xuất


Trực tuyến Ngoại tuyến
Alexander Ogurtsov Technical Lead / Programmer / System Administrator Mykolaiv, Ukraine Phones cell : +380-50-3942049 home: +380-512-582484 10+ years of experience in developing software and system administrating for DOS, Windows, LINUX and Web. Programming languages: C (10+ years), shell(8 years), Pascal-Delphi-Kylix (10 years), PHP(3+ years), SQL(3+ years ), perl, python, Assembler i86, Fortran System administrating: DOS-Windows (10+ years), Linux (8 years), UNIX, QNX. Servers and network administrating, designing and installing. Remote administrating. Open source code projects bug reporting, patching, packaging. Sysadmins team leader. Linux user group coordinator. Active member of Linux community Technologies: Programing: TCP/IP, UDP, HTML, JavaScript, HTTP, POP3, IMAP, SMTP, SMB(Netbios), PAM, multi-threading and multi-processing, RPC, CGI, gnu-toolchain, regexp, qt, xlib. Administrating: RPM, CVS, DNS, Apache, Postfix, Courier-IMAP, MySQL, Firewall), QoS, VoIP, asterisk, VLAN, wireless, RAID, SCSI, OpenLDAP, OpenSSL(TLS), Samba, FTP, clamav, spamassassin, squid, NetApp, syslog, syslog-ng, logrotate,snmp,rrad. Operating systems with environment: DOS, Windows3.1  XP, RedHat Linux, SuSE Linux, Debian Linux, ALTLinux, QNX, FreeBSD, BeOS,OpenFiler Expirence in team building and management, remote system administration. Three example project: Project One Project Description: System administrator for DevGatewayFoundations: Samba file & printer's server as Windows 2003 Active directory member. for changing MS Win2003 server the new was built on CentOS 5.0. Samba and cups RPMs was rebuilt from scratch for updated versions with spec file patching. The server configured as AD member with user's authentication on Win2003 server without system account on Linux host. The shares and files migrated with ACL support. Few migration script developed. SSH key-based authentication shell server Windows user's friendly just implementing simple OpenSSH server with key-based authentication, but with one small addition. It provides friendly support for popular windows ssh client  putty program. For over 50 existing users key pares generated. For new user's add SSH user script implemented. It create system user account,generate key pare, add users's open key to authentication , protected by password and e-mail it to user. Putty program uses own private key format, it provide an utility to generate it from standard private_key file, but native utility does not support key's pass phrase as command line parameter, so I've patch C source to add this feature. It is very useful for future using in scripts. Patch sent to official puty's developers. Centralized protected syslog system For company's servers farm dedicated system log's collector configured. All servers(RedHatAS, Fedora,CentOS based) write log both to local logfiles and to remote log's collector . The standard RH log file's location scheme has implemented. Log rotation based on datext syslog-ng abilities. Old logs compress by cron script. To protect loging from sniffing stunnel used, because all servers are public enable. For distribution which don't have syslog-ng in standard package base, the RPM built from scratch. The logs from CISCO router are collected by UDP protocol and filtered to avoid spoofing by internal syslog-ng rules. Also for the company' s RedHatAS, Fedora,CentOS based server's maintain and monitoring services was supported. In the process of working on Samba server's project OpenFiler disttribution tested. Duration of project: 4 months Hardware Used: about 20 servers and 50 workstations Operating System Used: RedHat,Fedora,CentOS, Windows2003 server Tools/Applications Used: Samba, CUPS, Apache, Cacti, stunnel, syslog-ng, OpennSSH, GNU toolchain, RPM etc Project Two Project Description: Heading Ukrainian sysadmins' team (Tier -Level3 support) for Hostopia Inc. Remote hosting cluster(over 5000 hosts in 10 clusters) administration , monitoring servers state, problem investigation, intruder and vulnerabilities detection and issues resolving, system configuration scripting. Support hosting clusters for Apache, MySQL, Sendmail, OpenSSL, bind, NetApps based on SuSE Linux, gentoo Linux, FreeBSD. As department head I've developed training course for new incomers. This course include learning of company specific system configuration, shell programing course, building LFS (Linux From Scratch) and LAMP ( Linux + Apache + MySQL +PHP) +SSL projects, additional trainings for DNS and MTA services. Duration of project: 12 months Number of team members reporting to you: 10 Hardware Used: several clusters with hundreds servers, NetAPS Database Used: MySQL Operating System Used: SuSE Linux, Gentoo Linux, FreeBSD Tools/Applications Used: Apache, MySQL, Sendmail, OpenSSL, bind, NetApps Project Three Project Description: SAMBA patch It was required for experimental hosting needs to allow users from Windows PCs to connect to their hosting's directories as to windows shares For some reasons, the following solution was accepted:to use old Samba version with patch for authentication. Patches made by me allow to authenticate user nonexistent in system if some directories,specific files and password associated with this login name exist . Extra parameters were added to standard Samba configuration file. All changes were provided as a patch for samba project source code. By my own initiative PAM module with the same functionality was developed after. Duration of project: 3 months Number of team members reporting to you: 2 testers Operating System Used: SuSE Linux, Windows XP Tools/Applications Used: Samba 2.0.12, grep, gcc, diff, patch, pam, nss
$12 USD/hr
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  • 100%Công việc đã Hoàn thành
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