My IT Blog

1. What are the Important Windows port numbers: RDP – 3389 – (windows rdp port number and remote desktop port number) FTP – 21 – (file transfer protocol) TFTP – 69 – ( tftp port number ) Telnet – 23 – ( telnet port number) SMTP – 25 – ( SMTP port number) DNS – 53 – ( dns port number and Domain Name System port number) DHCP – 68 – (DHCP port number and Dynamic Host Configuration Protocol port number ) POP3 – 110 – ( post office Protocol 3 port ) HTTP – 80 – (http port number) HTTPS – 443 – (https port number) NNTP – 119 – ( Network News Transfer Protocol Port number ) NTP – 123 – (ntp port number and network Time Protocol and SNTP port number ) IMAP – 143 – (Internet Message Access Protocol port number) SSMTP – 465 – ( SMTP Over SSl ) SIMAP – 993 – ( IMAP Over SSL ) SPOP3 – 995 – ( POP# Over SS L) Time – 123 – ( ntp port number and network Time Protocol and SNTP port number ) NetBios – 137 – ( Name Service ) NetBios – 139 – ( Datagram Service ) DHCP Client – 546 – (DHCP Client port

I am trying to create a new universal user group. Why can’t I?  Universal groups are allowed only in native-mode Windows Server 2003 environments. Native mode requires that all domain controllers be promoted to Windows Server 2003 Active Directory. What’s the difference between local, global and universal groups?  Domain local groups assign access permissions to global domain groups for local domain resources. Global groups provide access to resources in other trusted domains. Universal groups grant access to resources in all trusted domains. What is LSDOU?  It’s group policy inheritance model, where the policies are applied to L ocal machines,  S ites,  D omains and  O rganizational  U nits. Why doesn’t LSDOU work under Windows NT?  If the  NTConfig.pol  file exist, it has the highest priority among the numerous policies. Where are group policies stored?  %SystemRoot%System32\GroupPolicy What is GPT and GPC?  Group policy template and group policy container. Where is GP

T he Active Directory Database is Stored in  %SYSTEM ROOT%\NDTS  folder. The file is called as ntds.dit.  Along with this file there are other files also present in this folder. The files are created when you run  dcpromo.  The list of files and use of those files are listed below 1.  ntds.dit :  This is the main database file for active directory. 2.  edb.log :  When a transaction performed to ad database, like writing some data first the data will be stored to this file. And after that it will be sent to database. So the system performance will be depends on how this data from edb.log file will be written to ntds.dit. multiple .log files will be created according to the requirement. 3.  res1.log :  Used as reserve space in the case when drive had low space. It is basically 10MB in size and created when we run dcpromo. 4.  res2.log :  Same as res1.log. It is also 10MB in size and the purspose also same. 5.  edb.chk :  This file records the transactions committed to ad data

Introduction Flexible Single Master Operations (FSMO) is a feature of Microsoft’s Active Directory (AD). FSMOs are specialized domain controller (DC) tasks, used where standard data transfer and update methods are inadequate. AD normally relies on multiple peer DCs, each with a copy of the AD database, being synchronized by multi-master replication. The tasks which are not suited to multi-master replication, and are viable only with a single-master database, are the FSMOs. The FSMO roles are also called Single Master Operations or Operations Master, FSMO is sometimes pronounced as “fizmo”. What is the need of FSMO roles? Active directory is multi master replication model. Meaning clients can register their records to any available Active directory domain controller and have access to resources within active directory NTDS.DIT database. The purpose of having FSMO roles is being cause by Multi master replication model. In this model there has to be a way of preventing the c