Posted by jpluimers on 2025/05/05
Here are some of my blog posts on documenting using example domains and example IP-addresses or IP-ranges:
(I really wish that example.org and others would service SMTP with blackhole routing so one can also use it for bogus email addresses in documentation)
The blog posts above were incomplete (IPv6 was missing; IPv4 was not explained), so below are more links that do a better job based on a Tweet from [Wayback/Archive] Julia Evans (@b0rk).
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Posted in Conference Topics, Conferences, Development, DNS, documentation, Event, Infrastructure, Internet, IPv4, IPv6, Power User, Software Development | Leave a Comment »
Posted by jpluimers on 2025/04/28
In the past, I used to modify /etc/sysconfig/named and add entries to the NAMED_CONF_INCLUDE_FILES setting, then run /usr/share/bind/createNamedConfInclude
to generate /etc/named.conf.include.
As of OpenSuSE 15.4, /usr/share/bind/createNamedConfInclude has become an empty file and NAMED_CONF_INCLUDE_FILES got removed and NAMED_INITIALIZE_SCRIPTS introduced.
So now I changed my playbooks to manually generate /etc/named.conf.include and include it form /etc/sysconfig/named.
Since I hardly perform these new installations, it took a few years for me to find out about this change. Upgrading existing systems somehow kept the generated file and included it.
Related links with quotes as it was hard to find out what changed and how to work around and I wasn’t the only one bump into issues:
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Posted in *nix, *nix-tools, bash, bash, bind-named, Development, DNS, LEAP, Linux, openSuSE, Power User, Scripting, Software Development, SuSE Linux | Tagged: include | Leave a Comment »
Posted by jpluimers on 2024/05/24
Not that long ago I learned about [Wayback/Archive] DNS Checker – DNS Check Propagation Tool:
CHECK DNS PROPAGATION
Recently changed your DNS records, switched web host, or started a new website: then you are at the right place! DNS Checker provides a free DNS lookup service to check Domain Name System records against a selected list of DNS servers located in multiple regions worldwide. Perform a quick DNS propagation lookup for any hostname, and check DNS data collected from all available DNS Servers to confirm that the DNS records are fully propagated.
I wish I had known it before as it is a great tool to verify DNS lookups from around the world.
For my link archive (A and SOA records are the most important to me):
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Posted by jpluimers on 2024/01/31
A while after writing notes on updating DNS info with bind DNS, b0rk (Julia Evans) posted about her DNS zine which got a reply about her DNS lookup tool. Below is part of that thread.
The reason I post is that – unlike the Google DNS ToolBox – you can bookmark her DNS tool link including the actual search part, which makes it far easier to do systems administration.
Examples:
There is a trace tool too:
The thread:
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Posted in Development, DNS, Go (golang), Internet, Power User, Software Development, Web Development | Leave a Comment »
Posted by jpluimers on 2023/12/26
Every once in a while Jan Schaumann writes a long Twitter thread and saves it in a blog post. Always good ways to learn. This time it was no different: [Wayback/Archive] DNS Response Size started with
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Posted in Communications Development, Development, DNS, Internet, Internet protocol suite, IPv4, IPv6, Power User, TCP, tcpdump, UDP, Wireshark | Leave a Comment »
Posted by jpluimers on 2023/12/01
Steps:
- Edit the DNS zone file in
/var/lib/named/master
- Make sure you updated the SOA serial number
rcnamed restart- Watch
/var/lib/named/log/general for errors (you can even increase logging, for instance by reading [Wayback/Archive] this serverfault entry and editing /etc/named.d/logging) and – on my system – these other logs for the actual zone transfers:
/var/lib/named/log/in-xfer.log for incoming zone transfers on the secondary server/var/lib/named/log/notify.log for notifications of zone transfers on the primary and secondary servers/var/lib/named/log/out-xfer.log for outgoing zone transfers on the primary server
- Check on [Wayback/Archive] mxtoolbox.com/SuperTool.aspx?action=dns:example.org&run=toolpage# to see if the SOA serials have been replicated (one day I will write a bookmarklet for this)
Alternatives for the last step are sites like these:
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The Wiert Corner - irregular stream of stuff 