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$40 USD / hour
Flag of UKRAINE
kiev, ukraine
$40 USD / hour
It's currently 6:15 PM here
Joined September 4, 2004
1 Recommendation

Serhii C.

@sergechernyavsky

5.0 (13 reviews)
5.0
5.0
100%
100%
$40 USD / hour
Flag of UKRAINE
kiev, ukraine
$40 USD / hour
100%
Jobs Completed
100%
On Budget
100%
On Time
25%
Repeat Hire Rate

Linux / VoIP / Asterisk

## BIO I have BSCS and 10+ years experience in Linux/Unix/FreeBSD servers administration. Have worked with wide range of software and protocols in areas that include: VoIP, ISP networking, web hosting, video streaming, Clustering, RDBMS etc. My primary field is redundant VoIP/Asterisk systems. I do consulting, solution design, implementation, support and troubleshooting. Goals are high work quality and customer satisfaction. I available via email\Skype\SMS\Phone Hourly rate: $40 ## Areas of Expertise **OS:** * **Linux(all kinds)** Expert * **BSD** Good * **Unix** Good **Programming:** * **Perl** Expert * **PHP** Expert * **C/C++** Patching * **JS** Average * **Java** Average * **ActionScript** Average * **Shell** Average * **HTML** Average **Hardware:** * **Routers** Fritz!Box, Cisco, DrayTec, Lancom, D-Link, Astaro * **VoIP cards** Sangoma, Digium, Nortel, Dialogic **Protocols:** * **Physical layer** Ethernet, ISDN, T1/E1, 802.11 * **Low-level** ARP, IP, TCP, UDP, ICMP * **VPN/Tunnelling** openvpn, GRE, IP-IP, L2TP, PPTP, IPSec * **Routing** RIP, OSPF, EIGRP, BGP * **VoIP** SIP, IAX, H323 * **Application level** DHCP, DNS, FTP, HTTP/HTTPS, RTMP, IMAP, NTP, NFS, POP3, SMB, SMTP, SNMP, SSH, TELNET, TFTP **Software:** * **Virtualization** Xen, Qemu/KVM, VirtualBox, OpenVZ * **VoIP/FoIP** Asterisk, SER, GNUGK, oh.323, IAXmodem, HylaFAX * **RDBMS** MySQL/MariaDB, PostgreSQL, Firebird * **DNS** pdns, BIND, djbdns * **FTP** ProFTPD, vsftpd, WU-FTPD * **Mail** Qmail, Exim, Sendmail * **AAA** Radius * **WEB** Apache, nginx, lighttpd, thttpd * **Streaming** FMS, Wowza * **Firewalling** IPtables, IPchains, IPFW * **Misc** Drupal, MediaWiki, GeoIP, Heartbeat, PVM, NFS, NTP, samba, Squid, sshd, Zebra, etc. **Advanced Techniques:** * **Virtualization** * **Load-balancing, High perfomance & High-availability clustering (VoIP, LAMP, etc)** *   * **Complex IVR and AGI scripting** * **Asterisk modules and related software patching/writing** * **RDBMS design** * **Advanced routing, Traffic queuing and Firewalling**

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Reviews

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Showing 1 - 5 out of 13 reviews
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5.0
$200.00 USD
Quick response, completed the project ahead of time and fully resolved my issues for me.
VoIP
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Flag of Doug P.
@dpalin
•
11 years ago
5.0
$170.00 USD
I need a 10+++ for this excellent worker. He found a solution for any problem during the work and works very competent, exact and secure. I like to work always again with this worker. Thanks!
PHP
Engineering
Software Architecture
Software Testing
MySQL
V
Flag of Christian F.
@vagabundo
•
15 years ago
5.0
$17.00 USD
It was an hour and twenty minutes from realizing I had a problem to having Serg on the phone talking to my technicians. I'm very happy.
PHP
JavaScript
Software Architecture
Software Testing
Website Testing
+3 more
S
Flag of Matthew H.
@salvia1
•
15 years ago
5.0
$425.00 USD
Excellent worker, I recomend him. Very professional
PHP
Audio Services
Linux
Project Management
Engineering
+4 more
I
Flag of Juan G.
@iliux
•
16 years ago

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