DNS Tips

[sparktechs]

Hi,

Let me share some knowledge related to DNS. I hope you are aware of the tool dig that comes with linux.

To check your nameservers are properly responding and to override the cache of your ISP, go for a recursive query.

dig +trace domain.com

Here you will see the query going to root name servers and then it refers to top level domains and finally it reaches your nameservers and from it resolves your ip.

You can also check if the nameservers are properly functioning by

dig domain.com @ns1.domain.com and
dig domain.com @ns2.domain.com


Thanks

[beveiliging]

I do not understand question.
You can check for quick DNS on
intodns.com/
pweb.cz/en/dns-test/

If you need more test regarding DNS, WHois etc... you can check
http://www.find-ip-address.org

[~ServerPoint~]

sparktechs I think that you'd better contact your web hosting provider with this problem

[Alcatrazz]

I second intodns.com, great service with a lot of info to analize.

[tomherry]

I Can not understand your Question Properly. But I give you some info about DNS it may be help full for You........
Domain Name System Client Behavior in Windows Vista
Microsoft® Windows Vista™ includes both Internet Protocol version 4 (IPv4) and Internet Protocol version 6 (IPv6) protocol stacks that are installed and enabled by default. Domain Name System (DNS) name queries and registrations can now involve both IPv4 address records (A records) and IPv6 address records (AAAA records). This article describes the behavior of the DNS Client service in Windows Vista for DNS queries and registrations and the possible impact on DNS traffic.
Note: This article does not describe changes to DNS client behavior in versions of Windows released after Windows Vista with Service Pack 1 and Windows Server 2008, including additional service packs or other updates.
DNS Query Behavior
Computers running Windows Vista need to perform both A and AAAA queries to determine the best method of connectivity to the desired endpoint. By obtaining both IPv4 and IPv6 addresses, there is an increased chance of being able to access the desired endpoint if one of the addresses is unreachable.
The DNS Client service in Windows Vista has been designed to minimize the impact on DNS servers when performing DNS name queries through the following behavior:
• If the host has only link-local or Teredo IPv6 addresses assigned, the DNS Client service sends a single query for a records.
• If the host has at least one IPv6 address assigned that is not a link-local or Teredo address, the DNS Client service sends a DNS query for A records and then a separate DNS query to the same DNS server for AAAA records. If an A record query times out or has an error (other than name not found), the corresponding AAAA record query is not sent.
This DNS querying behavior will assist enterprises and ISPs in their transition to IPv6. When AAAA records are added to DNS either manually or through DNS dynamic update, computers running Windows Vista will by default use IPv6 over IPv4, providing proof to IT staff that the IPv6 routing and name resolution infrastructure is working properly for IPv6 connectivity. When organizations transition to an IPv6-only infrastructure and disable IPv4, the DNS Client service will send only AAAA queries.
Computers running Windows Vista can increase DNS traffic and the load on DNS servers when the computers have been configured with a global address:
• On intranets that have deployed IPv6 (either native or ISATAP), there will be additional DNS query traffic. However, deployments of Windows Vista in enterprise networks using IPv6 have not resulted in dramatic increases in the loads on intranet DNS servers. Intranets running at or near capacity for DNS might need to provide additional capacity to better support an enterprise deployment of Windows Vista.
• On the Internet, computers running Windows Vista by default will typically not be configured with a global address from their ISPs or from their gateway devices. At this time, typical ISPs do not support native IPv6 connectivity and typical home routers do not support the 6to4 transition technology. If a computer running Windows Vista is located behind a network address translator (NAT), the Teredo client component will automatically configure a global Teredo address, even if it is in an inactive state. However, a computer running Windows Vista will not send AAAA record queries if it only has a Teredo address assigned.
DNS Registration Behavior
The DNS Client service in Windows Vista uses DNS dynamic update and attempts to register the following records:
• A records for all IPv4 addresses assigned to the interfaces that are configured with a DNS server
• Pointer (PTR) records for IPv4 addresses assigned to interfaces that are configured with a DNS server
• AAAA records for all global IPv6 addresses assigned to interfaces that are configured with a DNS server
Teredo addresses are not registered.
For the typical intranet host configured with a global IPv6 address, additional AAAA records for IPv6 global addresses are registered. However, a DNS dynamic update client includes all of the records that they are registering in a single packet. Therefore, although there are additional records to register, there are no additional packets for AAAA record registration. Therefore, the impact on intranet DNS servers for AAAA registration is minimal.
Typical Internet-based DNS servers do not support DNS dynamic update. However, if an Internet-based DNS server did support DNS dynamic update, there is typically no additional traffic because the typical Windows Vista-based Internet host does not have a global IPv6 address assigned and Teredo addresses are not registered. Therefore, for typical Windows Vista-based hosts on today's Internet, there is no performance impact on Internet DNS servers for DNS registration.

[clint999]

I do not understand question.
You can check for quick DNS on
intodns.com/
pweb.cz/en/dns-test/

If you need more test regarding DNS, WHois etc... you can check
http://www.find-ip-address.org

[india-love]

intodns.com is good to text dns nameservers.

[timetogo]

http://www.opendns.com

[BBVPS]

thank you for intodns.com site , it was great

[111host]

Try OpenDNS Its Smooth

[Oracle]

Typical DNS errors include the following:

These and similar errors can show up in a variety of places -- often in the description of an event. For instance, the famous replication error, event 1311, often lists "DNS Lookup Failure" in the description. The repadmin/showrepl command may expose a DNS failure, or DCPromo may indicate "unable to contact domain."

[arslan220]

thanks for sharing these tips.

[seocorporationp]

Yeah!! You're right..I think you can also get it checked online anywhere..
_______________________________________
Web Design London

[loraindeniso3]

Great Tips Provide by you regarding the DNS. Actually I doen't know about DNS so these information is helpful for me.
Thank you for share with us.

[noeal11]

thank u one and all for providing great information regarding DNS Tips.....