![]() This all works much better/reliable with linux and dig than with nslookup/windows. When you have reliable information about the SOA from the TLD authoritative server, you can then query the primary name server itself authoritative (the one thats in the SOA record on the gTLD nameserver!) for any other NS records, and then proceed with checking all those name servers you've got from querying the NS records, to see if there is any inconsistency for any other particular record, on any of those servers. (The information about which server is authoritative for which TLD can be queried from the root name servers). You need to query the server that is authoritative for the top level domain to obtain reliable SOA information for a given child domain. The SOA record on the authoritative server itself is, on the other hand, not strictly needed for resolving that domain, and can contain bogus info (or hidden primary, or otherwise restricted servers) and should not be relied on to determine the authoritative name server for a given domain. SOA records are present on all servers further up the hierarchy, over which the domain owner has NO control, and they all in effect point to the one authoritative name server under control of the domain owner. Here, the two authoritative name servers have the same serial number. The source code is available in % check_soa To check discrepencies between name servers, my preference goes to the old check_soa tool, described in Liu & Albitz "DNS & BIND" book (O'Reilly editor). To find out the server listed as primary (the notion of "primary" is quite fuzzy these days and typically has no good answer): % dig +short SOA | cut -d' ' -f1 To find out the name servers of a domain on Unix: % dig +short NS The secondary name servers are authoritative. ![]() ![]() Unless you mean "primary name server" and not "authoritative name server". At all times make sure that you have control over your administrative email contact.You used the singular in your question but there are typically several authoritative name servers, the RFC 1034 recommends at least two. This may be alright in certain cases, but it is always safer to take control of your domains completely. Often your hosting company may set themselves as one or more contacts. Currently this project supports: Yi Home 17CN / 27US / 47US. Find domains that have a wrong email contact. This project is a collection of config files, Makefiles and scripts to allow custom firmware images to be created and deployed to extend the functionality of Xiaomi Cameras based on HiSilicon Hi3518e V200 chipset. Ensure that all domains are actually using name servers you think they should be using. You could be losing website visitors if some of the name servers used are wrong. Find domains that have wrong name servers. It goes without saying what a benefit that is. It will easily pay for itself by virtue of the time it will save you, and also greatly reduce the risk of forgetting to renew any of your valuable domains. If you have more than a dozen or so domains, do yourself a big favor and get hold of this program. Watch My Domains Pro is primarily meant for small businesses and individuals who own multiple domain names. ![]() Watch My Domains Professional is a Windows desktop software for organizing, managing and protecting your Domain Names.ĭo you own multiple domain names? Find it difficult to manage the domain registration renewals? Watch My Domains Pro makes Domain Portfolio Management Very Simple! Watch My Domains Pro v3 has native support for Internationalized Domain Names (IDN).
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