Recent News

Simple DNS Plus v. 5.3 build 101 is now available at https://simpledns.plus/download.

This release includes the following addition and bug fixes:

- Added: Automatic check for Simple DNS Plus software updates (with Options dialog checkbox to disable). - Fixed: With the new DNS0X20 option enabled, incoming error responses with no q-section would be ignored. In combination with the EDNS0 option, this caused problems resolving domain names hosted on older DNS servers that do not...

Simple DNS Plus version 5.3 is here!

The most requested feature that we have added in v. 5.3 is the new ALIAS-record.

These are virtual alias records resolved by Simple DNS Plus at at the time of each request - providing "flattened" (no CNAME-record chain) synthesized records with data from a hidden source name. This can be used for different purposes - including solving the classic problem with CNAME-records at the domain apex (for the zone name / for "the naked domain").

Check...

The Domain Blacklist plug-in redirects DNS requests for domain names on a blacklist. For details see https://simpledns.plus/plugin-domainbl

This now also works with requests for IPv6 addresses (AAAA).

To use the updated plug-in, shut down Simple DNS Plus, download the "DomBlacklistPlugIn.dll" file from https://github.com/jhsoftware/sdns-DomainBL/releases into the "plugins" directory under the directory where Simple DNS Plus is installed - overwriting the original file, and...

We have today published the source code for the following Simple DNS Plus v. 5.2 plug-ins:

- Fixed Host Name plug-in Source code: https://github.com/jhsoftware/sdns-FixedData - Fixed IP Address plug-in Source code: https://github.com/jhsoftware/sdns-FixedData - Hosts File plug-in Source code: https://github.com/jhsoftware/sdns-HostsFile - Ignore DNS Request plug-in Source code: https://github.com/jhsoftware/sdns-IgnoreReq - Regular Expressions plug-in Source code:...

Simple DNS Plus v. 5.2 build 132 is now available at https://simpledns.plus/download.

This release includes the following addition and bug fix:

- Added: New free educational license type. Details. - Fixed: If the Simple DNS Plus main window, the "Edit DNS records" windows, or the "DNS lookup" window was on a secondary monitor when closed, these windows would in some cases be re-opened outside the visible screen area if the monitor configuration had changed in the meantime.

This is...

Simple DNS Plus v. 5.2 build 131 is now available at https://simpledns.plus/download

This release includes the following bug fix:

- Fixed: Did not always include OPT record in larger response packets to EDNS0 requests. This would cause DNSSEC validation errors with some systems.

Generally, this situation will only happen if you use DNSSEC signed records, and only with large DNS responses (for example if you have many MX or NS records for the same name).

You only need to update...

With this plug-in, Simple DNS Plus can automatically synthesize reverse DNS records (PTR) for all the IP addresses (IPv4 or IPv6) in a subnet .

This can be used if you manage a large number of IP addresses, and you need to provide generic reverse DNS records for these.

The plug-in will respond with reverse DNS records pointing to a synthesized host name in the format <prefix><ip-address-><suffix>. Dots and colons in IP addresses are replaces with hyphens, and you can choose to either...

With this plug-in, you can make Simple DNS Plus ignore all DNS requests for names that match a configurable regular expression.

This could be used, for example, when the server is being bombarded with requests with a specific pattern (as is often seen in DNS amplification attacks). Another example is simple parental control - blocking domain names containing bad words.

Regular expressions are compiled when Simple DNS Plus loads the plug-in instance and are therefore evaluated very...

Simple DNS Plus v. 5.2 build 130 is now available at https://simpledns.plus/download.

This release includes the following bug fix:

- Fixed: Failed to zone transfer zones containing NSEC3 records with zero length type bit map.

Generally, this situation (an NSEC3 records having a zero length type bit map) should never happen as there is not much point in having an NSEC3 record covering no types. However we have seen this "in the wild" in a setup where the primary is a Microsoft DNS...

Simple DNS Plus v. 5.2 build 129 is now available at https://simpledns.plus/download.

This release includes the following bug fixes:

- Fixed: The "DNSKEY only" setting in the "DNSSEC Key Set" dialog was not saved to disk, and therefore forgotten (reverted to "off") when the "DNSSEC Sign Zone" dialog was closed. - Fixed: Program crash when serving data from a DNS zone containing one or more NSEC records, but no NSEC record for zone name (incorrectly DNSSEC signed zone).

This is NOT...