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Whitepaper: DNS Caching and Simple Failover
3 page document exploring how Simple Failover DNS updates are affected by DNS Caching:
dns-caching.pdf
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Recommended DNS Servers
Simple DNS Plus: http://www.simpledns.com
BIND: http://www.isc.org
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BIND sample configuration files
Download configuration file allowing standard DNS updates from a single IP
address
here (rename this file to "named.conf")
Download configuration file allowing only TSIG authenticated DNS updates
here (rename this file to "named.conf")
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TSIG Key Generator
This GUI tool can be used to generate TSIG key values for use with BIND and other DNS servers.
The generated value can be used with Simple Failover, or any other application using TSIG authenticated DNS updates.
This tool is quicker and much simpler to use compared to the command line tools from BIND - and just as secure.
An identical function is built into Simple Failover.
Documentation is included with the tool.
You can download it from here:
tsigkeygen-se.exe (143 KB)
Please note that this file is a self-extracting zip file - not a full installation program.
Run the file, select a folder to extract the files to, and run "tsigkeygen.exe" from there.
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Sample dynamic IP services (confirmed to work with Simple Failover)
http://www.dyndns.org
http://www.webreactor.net
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Internet Explorer Timeout Tuner
This tool can be used to adjust Internet Explorer DNS caching, Keep Alive, and Server Info timeout settings,
which can be very helpfull when testing DNS round robin and failover setups.
Documentation describing the individual settings is included with the tool.
You can download it from here:
ietimeout-se.exe (64 KB)
Please note that this file is a self-extracting zip file - not a full installation program.
Run the file, select a folder to extract the files to, and run "ietimeout.exe" from there.
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WMI core services
If you are updating a Microsoft DNS server via WMI, and if you are running Simple Failover on a Windows 95, 98, or NT4 computer,
then you
will need to install WMI on the Simple Failover computer (later Windows versions have this
pre-installed).
You can download the WMI installer from here:
wmicore.exe (6.39 MB).
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DNS WMI Provider
If you are updating a Microsoft DNS server on Windows 2000 Server via WMI, you must first install the "DNS WMI Provider" on the Windows
2000 Server.
You can download it from here: dnsprov.zip (404 KB).
This file includes a "readme.txt" file with instructions for installing the
provider.
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dnscmd.exe
If you wish to update a Microsoft DNS server via custom scripting, you can use the "dnscmd.exe" command line
tool.
This is available from Windows Resource Kits, Microsoft's web-site, and some Windows installation CDs.
You can also download different versions of the "dnscmd.exe" tool in a
single self-extracting zip file from here:
dnscmd-se.exe (172 KB).
For instructions on using the tool, type "dnscmd -?" at a command prompt, and/or see the related documentation
from Microsoft.
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Related RFCs
RFC821 SMTP Simple Mail Transfer Protocol
RFC959 FTP File Transfer Protocol
RFC977 NNTP Network News Transfer Protocol
RFC1035 Domain names - implementation and specification
RFC1939 POP3 Post Office Protocol – Version 3
RFC1945 HTTP Hypertext Transfer Protocol - HTTP/1.0
RFC2136 DNS Update Dynamic Updates in the Domain Name System (DNS UPDATE)
RFC2845 TSIG Secret Key Transaction Authentication for DNS (TSIG)
RFC3501 IMAP Internet Message Access Protocol - Version 4rev1
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Software Download Sites
Click here for a list of software download sites listing Simple Failover.
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