Networking Tips Tricks

ERROR: # Oct 6 14:11:06 nibappsun08 sendmail[9825]: [ID 702911 mail.alert] unable to qualify my own domain name (nibappsun08) -- using short name Solution: The error is being caused because 'sendmail' is not configured properly to function as a bonafide mail server. You will see this message every time you reboot the server and it will eventually time out.

When the DHCP Server role is installed on a domain controller, the DHCP Server inherits the security permissions of the domain controller. To prevent possible misuse of the domain controller’s elevated permissions, DHCP Servers that are installed on Windows Server 2003 do not register DNS records on behalf of the clients that are associated with the DHCP Server unless the DHCP Server is explicitly configured with DNS credentials. This behavior prevents a potential escalation of privilege to clients of the DHCP Server. Configuring DNS credentials on a DHCP Server that is running Windows Server 2003 Follow these steps to configure the DNS credentials of a DHCP Server that is installed on a domain controller running the Windows Server 2003 operating system: Start the DHCP management console. Click Start , then click Run and type dhcpmgmt.msc . In the DHCP navigation pane, expand the server node and right-click IPv4 , and then click Properties . In...

Question: What is SPF record? and How to make an entry of it in DNS? From last few days i could not able to send mails to hotmail. i am getting below error in header. i think i need to fill email support form of msn and send it. before that my friend told me that you need to create SPF record in DNS. i do not know how and where i can make it? Answer: The Sender ID Framework is an e-mail authentication technology protocol that helps address the problem of spoofing and phishing by verifying the domain name from which e-mail messages are sent. Sender ID validates the origin of e-mail messages by verifying the IP address of the sender against the alleged owner of the sending domain. How to Create  Sender ID Framework SPF Record? This is four-step guide will assist you through the process of creating a new SPF record for your DNS domain.  You need to add this DNS record to your domain's DNS configuration. Note    if you want to use some of the more advance features...

What is a DNS STUB zone? A stub zone is a copy of a zone that contains only those resource records necessary to identify the authoritative Domain Name System (DNS) servers for that zone. A stub zone is used to resolve names between separate DNS namespaces. This type of resolution may be necessary when a corporate merger requires that the DNS servers for two separate DNS namespaces resolve names for clients in both namespaces. The master servers for a stub zone are one or more DNS servers authoritative for the child zone, usually the DNS server hosting the primary zone for the delegated domain name. What does a DNS stub zone consists of? A stub zone consists of:  The start of authority   (SOA) resource record, name server (NS) resource records, and the glue A   resource records for the delegated zone.

How do you set DNS namserver under Sun Solaris UNIX system? The resolver is a set of routines in the C library that provide access to the Internet Domain Name System (DNS). The resolver configuration file contains information that is read by the resolver routines the first time they are invoked by a process. The file is designed to be human readable and contains a list of keywords with values that provide various types of resolver information. Internet address (in dot notation) of a name server that the resolver should query. Up to MAXNS (currently 3, see  ) name servers may be listed, one per keyword. If there are multiple servers, the resolver library queries them in the order listed. To configure Solaris nameserver edit or modify /etc/resolv.conf file. DNS Client Setup First Create the file called /etc/resolv.conf - which includes the primary and secondary DNS server IP address for Solaris system, it can be your own DNS server or your ISPs DNS server: # touch /etc/...

Fix for Firefox & IE Address Bar to Prevent OpenDNS From Redirecting Google Search pages Like everyone else, I search the web from the browser address bar and have set Google as the default search engine in both Firefox and IE. I also use OpenDNS for DNS Sounds like a perfect combination but a side effect of using OpenDNS is that you can no longer search Google from Firefox location bar or the address bar of Internet Explorer.

  We  love OpenDNS  but for one annoying feature where OpenDNS automatically redirects typos and invalid URLs to their own ad-filled search pages as in this screenshot. Let me explain - if you type a non-existent web domain in your web browser (e.g. gmail.coms instead of gmail.com), you'll land up on OpenDNS search page and won't see the default "Address Not Found" error in your browser.

From your Windows Server 2003 desktop click on  Start>Control Panel>Add or Remove Programs : The add and remove programs window should come up. Click on  Add/Remove Windows Components : The Windows Components Wizard should come up.  Scroll down, and select “ Network Services”  and click on  Details: Check  Domain Name System (DNS)  from the first option: Click on OK, and then click on  Next  in the wizard window. The installation of DNS should start. if your Server is setup with dynamic   IP address, you will get this warning at the middle of the installation: Click on the OK button.  The Local Area Connection Properties window will come up to setup the static IP address.select  Internet Protocol (TCP/IP)  and click on properties. The TCP/IP Properties window will come up. type the IP address, subnet mask, default gateway, and DNS. by typing IPconfig /all on the command prompt you can get this informa...

What is the scope of the advisory?   This advisory provides   notification that updates are available that help define an   organizational boundary for systems that are domain joined but do not   have a DNS suffix list configured.   What is a top-level domain (TLD)?   The   top-level domain (TLD) is the last part of an Internet domain name.   These are the letters that follow the final dot of any domain name. For   example, in the domain name wpad.western.corp.contoso.co.us, the TLD is   ".us". TLDs can be primarily split into two types: country code and   generic. Country code TLDs are two letter abbreviations for each   country. In this example .us is for United States. Generic TLDs are the   more traditionally recognizable three (or greater) letter abbreviations   such as .com, .net, .org, etc. For a full list of all available TLDs,   refer to the following list at IANA.What is a Primary DNS Suffix (PDS)? ...

DNS Round Robin and Destination IP address selection   This   post is meant to discuss the issues that can occur with Destination IP   address selection and its affect on the DNS Round Robin process.   What is Round Robin and Netmask Ordering   DNS   Round Robin is a mechanism for choosing an IP address from the list   returned by a DNS server so that all clients won't get the same IP   address every time. Netmask ordering is a mechanism for further   optimizing which IP address is used by attempting to determine the   closest result.   842197 Description of the netmask ordering feature and the round robin feature in Windows Server 2003 DNS http://support.microsoft.com/default.aspx?scid=kb;EN-US;842197   The netmask ordering feature is used to return addresses for type A DNS   queries to prioritize local resources to the client. For example, if   the following conditions are true, the results of a query for a name...