Specialization and Projects

Cloud Computing, Solutions, and Administration::
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  • Google workspace Hybrid Solution, implementation, and Migration
  • Google Infrastructure Modernization, Automation
  • Hybrid Cloud, MultiCloud, Public Cloud, Private cloud-related solutions

Linux System Administration::
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Works in different Distributions like CentOS, RedHat, Debian, FreeBSD, Fedora

* System Administration: Users Policy Management, Network Management, File System
Management, Systems Security, Software Management, Services Run Level Control, SHELL
Scripting. Integration between Linux and windows environment.
* Server and Configuration: File Server- FTP, SAMBA, NFS. DNS Server- bind,
* Caching-name server, Proxy-Squid. Web Server- Apache,
Network Server-DHCP, Database Server- Mysql Server.
* IP-Telephony systems: Elastix and trixbox.(asterisk, ss7, frepbx, a2billing etc)
* MAIL Server- Different MTA with sendmail, postfix for SMTP. Dovecot for POP3,POP3S,
IMAP, IMAPS, MailScanner, Clamav, Spamassign, greylisting etc.
Printer Server-CUPS, and webmail interfaces like Horde, Squirrel mail, Openwebmail,
Bandwidth Manager- HTB, CBQ.
* Deployment: System Tools- MRTG (Multi Router Traffic Grapher), iftop(Traffic Monitoring
Tools), MTR (For Trace route), SNMP, ehterapp, tetherial etc.
Broadband Controller Daemon (Strong Firewall, MAC based authe and filtering, SNMP,
Bandwidth, MRTG).
LAMP- Linux, Apache ,Mysql, PhP, Monitoring Tools- Zabbix, Awstat, SMS3, Nagios.
* Storage Management: System disk drive partition implementation and maintenance by
creating LVM, RAID, ACL, Quota, CA Storage, Free NAS.
* Security configuration: Firewall using IPTABLES Firewall (NAT, FILTER, MANGLE) rules,
Security Enhance Linux policy(SELinux), IPCHAIN, PAM (Password Authentication Module),
ACL, sudo scrip for sudoers and port customization for different services.

Routing, Switching and Customized Administrations/Solutions (ISP, IIG, ICX, IGW) ::
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* Works in Cisco Routers:: CISCO7606, CISCO 7206vxr, Cisco 3640, Cisco 2821
* Cisco Switches:: C3560, C2960-24TT-L, C2960-24TC-L, c2950,
* Huawei Routers:: Huawei NE20, Huawei NE40, Quidway S3952P,
Huawei switches:: Quidway S5648P, Quidway S2403TP-EA, Quidway S2403,
Mypu Router:: MP2804 Mypu Router, MPC8248
*** Juniper Firewall/Router:: Juniper m7i, Juniper MX5, Juniper MX10, J-4350-SC, SSG140, SSG (Series Secure Services Gateway) , Juniper Switches ex4200-48t, SSG140
Other Broadband and wireless devices: NETGEAR, Level1, Airelive, Belkin, TP-LINK, D-Link, Linksys

* Strong in IP management, CISCO Router Switches, Linux System and Network Administrating, All kinds Network (Corporate Office Support, Client Support), Core Networking,
* Strong in Routing and Switching like iBGP, eBGP, MPLS, VLAN, VTP, Inter-VALN Routing, EIGRP, OSFP, RIP and Static Routing.
* Dialogic I-Gate 4000 PRO Media Gateway, Tejas TJ1600
* OSPF with multi-vendor devices and with multi areas
* Route-map manage with Policy Based Route(PBR) for Load Balancing and sharing in between
multiple Network
* Route redistribution implementation over large network for different dynamic routingProtocol
* Encapsulation 802.1q, VLAN configuration, Trunk port configuration, inter VLAN Routing,
Spanning tree Protocol (STP) implementation
* Bandwidth shaping from switch port, storm control, broadcast control etc.
* Use daily monitoring commands and auto backup, restore of all configurations
* BGP monitoring and prefix shifting from Mango to BTCL or vice versa
* Using ACL standard and Extended for security and filtering
* Routing with clients router and make customize client solutions.
* MRTG, SNMP and NTP of all devices for monitoring
* Process, CPU and memory use check and transfer all logs to syslog server.

Mikrortik Based Solutions::
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Works in Mikrotik RB-750, RB-751, PC-board,750GL, 450G, RB1200,

* Bandwidth Management, Firewall, port forwarding, redirect, service and application filtering
* WebProxy and log server with Mikrotik,
* Load balancing and link redundancy with Mikrotik,
* VPN and tunnelling line site-to-site, EOIP,
* Routing like static, OSPF, default with Mikrotik,
* VLAN, trunking and sub-interface with Mikrotik,
* Data connectivity solutions for corporate offices with Mikrotik
* Monitoring with dude, graphing and security with Mikrotik,
* Backup, Restore, Radius and other services with Mikrotik

Some Real Life works/Projects by me
==========================

1) Private Cloud and Virtualization with Vmware and vSphere ESXi and Linux VLAN at ISN
Purpose: Virtualization and to run multiple server and services within a single server
Used: Vmware, vSphere ESXi andLinux VLAN

2) HA with Cluster web and database Solutions with SAN EMC and Linux
Purpose: To use un-interrupted web and database access for Daffodil Group.
Used: EMC iSCSI, Redhat Linux cluster, rgmanager, iscsi-initiator-utils , ricci and
Other tools.

3) Linux Bandwidth Manager At ISN
Purpose: To manage Bandwidth in Linux Server from Web view
Used: PHP, MySQL, Linux Scripting

4) Radius and Hotspot NAS Server Management At GCL
Purpose: Log monitoring, Prepaid Card, NAS Autehnticaion in Radius
Used: MySQL, Linux Scripting, PHP, HTML, Linux Radius, Mikrotik

5) SMS, MRTG and Syslog Server Customization At GCL
Purpose: To monitor logs of all servers, routers, switches, connectivity status, routing status and see all usage and process graphs
Used: Active Expert, sms3, mysql, CentOS5,syslog-ng, cacti

6) Total Network customization with ip-planning, VLAN and redundant OSPF
Purpose: To get all POP redundancy, future network planning, Network presentation, quick troubleshoot, better performance and work with different vendor devices.
Used: 802.1Q,VLAN,OSPF,ipplaning software, Microsoft Visio and different vendors devices like CISCO, Huawei, Mikrotik, Mypu, Juniper, Linksys, NETGEAR etc.

7) Projects At Bangladesh Army Head Quarter(Firewall, Network and System),
Bangladesh Police Head Quarter(Network , System & Mail),
Shah-Jalal International Airport Immigration Centre(VPN and Network),
Different Embassy Network and Security Appliance

8)  Firewall and Security Infrastructure environment for Daffodil International University

Using: Juniper Firewall SRX-650

Identity-based UTM, Centralized Security Management, Content & Application Filtering, Anti-virus and Anti-spam, Evolution of Enterprise Security