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<article class="gdoc-markdown">
<h1>Maint. Log Archive</h1>
<p>A log of changes to the burble.dn42 network.</p>
<hr>
<div class="gdoc-page__anchorwrap"><h2 id="6th-december-2021">6th December 2021<a data-clipboard-text="http://localhost:2010/additional/maintlog/#6th-december-2021" class="gdoc-page__anchor gdoc-page__anchor--right clip" aria-label="Anchor 6th December 2021" href="#6th-december-2021"><svg class="icon link"><use xlink:href="#link"></use></svg></a></h2></div>
<p>As you may have noticed, the maintenance log is no longer being kept up to date !</p>
<div class="gdoc-page__anchorwrap"><h2 id="17th-july-2021">17th July 2021<a data-clipboard-text="http://localhost:2010/additional/maintlog/#17th-july-2021" class="gdoc-page__anchor gdoc-page__anchor--right clip" aria-label="Anchor 17th July 2021" href="#17th-july-2021"><svg class="icon link"><use xlink:href="#link"></use></svg></a></h2></div>
<p>A new dedicated server us-nyc1 has joined burble.dn42, hosted in Virmach&rsquo;s
Buffalo, NY datacentre.</p>
<p>The server is not open for peering, however it does host a shell server
that you are free to use. See the <a href="/services/shell/">Shell Accounts</a>
service page for more info.</p>
<div class="gdoc-page__anchorwrap"><h2 id="27th-june-2021">27th June 2021<a data-clipboard-text="http://localhost:2010/additional/maintlog/#27th-june-2021" class="gdoc-page__anchor gdoc-page__anchor--right clip" aria-label="Anchor 27th June 2021" href="#27th-june-2021"><svg class="icon link"><use xlink:href="#link"></use></svg></a></h2></div>
<p>The shell servers now have apache2 installed to provide home directory
public_html access.<br>
See the <a href="/services/shell/">Shell Accounts</a> service page
for more info.</p>
<div class="gdoc-page__anchorwrap"><h2 id="23rd-june-2021">23rd June 2021<a data-clipboard-text="http://localhost:2010/additional/maintlog/#23rd-june-2021" class="gdoc-page__anchor gdoc-page__anchor--right clip" aria-label="Anchor 23rd June 2021" href="#23rd-june-2021"><svg class="icon link"><use xlink:href="#link"></use></svg></a></h2></div>
<p>Added shell.ca-bhs2.burble.dn42 as a new shell server.</p>
<div class="gdoc-page__anchorwrap"><h2 id="21st-june-2021">21st June 2021<a data-clipboard-text="http://localhost:2010/additional/maintlog/#21st-june-2021" class="gdoc-page__anchor gdoc-page__anchor--right clip" aria-label="Anchor 21st June 2021" href="#21st-june-2021"><svg class="icon link"><use xlink:href="#link"></use></svg></a></h2></div>
<p>Added new <a href="/services/shell/">Shell Accounts</a> service</p>
<div class="gdoc-page__anchorwrap"><h2 id="19th-may-2021">19th May 2021<a data-clipboard-text="http://localhost:2010/additional/maintlog/#19th-may-2021" class="gdoc-page__anchor gdoc-page__anchor--right clip" aria-label="Anchor 19th May 2021" href="#19th-may-2021"><svg class="icon link"><use xlink:href="#link"></use></svg></a></h2></div>
<p><a href="https://git.burble.dn42/burble.dn42/dn42regsrv">dn42regsrv</a> now supports publishing ROA in OpenBGPD format.</p>
<p>The ROA are now published at the following links:</p>
<ul>
<li><a href="https://dn42.burble.com/roa/dn42_roa_obgpd_46.conf">https://dn42.burble.com/roa/dn42_roa_obgpd_46.conf</a></li>
<li><a href="https://dn42.burble.com/roa/dn42_roa_obgpd_4.conf">https://dn42.burble.com/roa/dn42_roa_obgpd_4.conf</a></li>
<li><a href="https://dn42.burble.com/roa/dn42_roa_obgpd_6.conf">https://dn42.burble.com/roa/dn42_roa_obgpd_6.conf</a></li>
</ul>
<blockquote class="gdoc-hint warning">
us-nyc1 and us-chi1 have been removed from service and decommissioned.<br>
If you were peered on these nodes, please contact me if you wish to re-peer on a different node.
</blockquote>
<div class="gdoc-page__anchorwrap"><h2 id="10th-april-2021">10th April 2021<a data-clipboard-text="http://localhost:2010/additional/maintlog/#10th-april-2021" class="gdoc-page__anchor gdoc-page__anchor--right clip" aria-label="Anchor 10th April 2021" href="#10th-april-2021"><svg class="icon link"><use xlink:href="#link"></use></svg></a></h2></div>
<p>The b.recursive-servers.dn42 DNS resovler is running an experimental build
of pdns-recursor to test a fix of <a href="https://github.com/PowerDNS/pdns/issues/10263">this issue</a>.<br>
Please let me know if you spot any strange problems.</p>
<p>burble.dn42 websites are now using a TLS certificate issued by the
<a href="https://acme.dn42">DN42 ACME</a> service.</p>
<p>A number of significant changes have been implemented for the global route collector</p>
<ul>
<li>Downstream peerings have been stopped, in favour of parsing the MRT dumps</li>
<li>The collector has moved from de-fra1 to fr-rbx1, where bandwidth is no issue</li>
<li>A special routing policy has been implemented for the collector to encourage traffic
to go directly to fr-rbx1 and not transit through burble.dn42 nodes. See also the <a href="/network/routing-policy/#collectordn42">Routing Policy</a> page.</li>
<li>Internal rate limits on BGP sessions have been relaxed</li>
</ul>
<div class="gdoc-page__anchorwrap"><h2 id="3rd-april-2021">3rd April 2021<a data-clipboard-text="http://localhost:2010/additional/maintlog/#3rd-april-2021" class="gdoc-page__anchor gdoc-page__anchor--right clip" aria-label="Anchor 3rd April 2021" href="#3rd-april-2021"><svg class="icon link"><use xlink:href="#link"></use></svg></a></h2></div>
<p>The collector is now using a TLS certificate issued by the
<a href="https://acme.dn42">DN42 ACME</a> service. The collector is behind an anycasted
reverse proxy, so a normal ACME challenge will not work. Instead, the certificate
is managed using
<a href="https://stackexchange.github.io/dnscontrol/">dnscontrol</a> to respond to
an ACME DNS challenge.</p>
<p>DNSSEC has been enabled on all edge nodes.</p>
<div class="gdoc-page__anchorwrap"><h2 id="2nd-april-2021">2nd April 2021<a data-clipboard-text="http://localhost:2010/additional/maintlog/#2nd-april-2021" class="gdoc-page__anchor gdoc-page__anchor--right clip" aria-label="Anchor 2nd April 2021" href="#2nd-april-2021"><svg class="icon link"><use xlink:href="#link"></use></svg></a></h2></div>
<p>There was a major DNS outage today as a minor change took out the entire service.</p>
<p>What should have been a trivial config change actually upgraded the container
from Alpine 3.11 to Alpine 3.13 and caused a number of the DNS applications to
stop working due to incompatibilities.</p>
<p>The lack of working DNS meant it was more complicated to bootstrap the service
back again, leading to a long delay in restoring service.</p>
<div class="gdoc-page__anchorwrap"><h2 id="27th-march-2021">27th March 2021<a data-clipboard-text="http://localhost:2010/additional/maintlog/#27th-march-2021" class="gdoc-page__anchor gdoc-page__anchor--right clip" aria-label="Anchor 27th March 2021" href="#27th-march-2021"><svg class="icon link"><use xlink:href="#link"></use></svg></a></h2></div>
<p>Fixed a bug in bird that was preventing MRT dumps from the collector working.
Hopefully the dumps can now be successfully parsed:
<a href="https://mrt.collector.dn42">https://mrt.collector.dn42</a></p>
<div class="gdoc-page__anchorwrap"><h2 id="25th-march-2021">25th March 2021<a data-clipboard-text="http://localhost:2010/additional/maintlog/#25th-march-2021" class="gdoc-page__anchor gdoc-page__anchor--right clip" aria-label="Anchor 25th March 2021" href="#25th-march-2021"><svg class="icon link"><use xlink:href="#link"></use></svg></a></h2></div>
<p>Bird <a href="https://gitlab.nic.cz/labs/bird/-/blob/master/NEWS">2.0.8</a> has been deployed
across the network. Please let me know if you see problems.</p>
<p>burble.dn42 uses a custom bird build that includes additional debugging. The
source code for the build is available on <a href="https://git.burble.dn42">git.burble.dn42</a>.</p>
<blockquote class="gdoc-hint warning">
<p><strong>Advanced Notice</strong></p>
<ul>
<li>us-nyc1 will be decommissioned before 15/04/21</li>
<li>us-chi1 will be decommissioned before 14/05/21</li>
</ul>
</blockquote>
<div class="gdoc-page__anchorwrap"><h2 id="23rd-february-2021">23rd February 2021<a data-clipboard-text="http://localhost:2010/additional/maintlog/#23rd-february-2021" class="gdoc-page__anchor gdoc-page__anchor--right clip" aria-label="Anchor 23rd February 2021" href="#23rd-february-2021"><svg class="icon link"><use xlink:href="#link"></use></svg></a></h2></div>
<p>Updated IPv6 address for hk-hkg1</p>
<div class="gdoc-page__anchorwrap"><h2 id="10th-january-2021">10th January 2021<a data-clipboard-text="http://localhost:2010/additional/maintlog/#10th-january-2021" class="gdoc-page__anchor gdoc-page__anchor--right clip" aria-label="Anchor 10th January 2021" href="#10th-january-2021"><svg class="icon link"><use xlink:href="#link"></use></svg></a></h2></div>
<p>Upgraded the <a href="https://lg.burble.com/">looking glass</a> to use
<a href="https://github.com/xddxdd/bird-lg-go">bird-lg-go</a>.</p>
<p>The main benefit of the go version is that it executes queries in
parallel, greatly improving response times with a large number
of nodes.</p>
<div class="gdoc-page__anchorwrap"><h2 id="6th-january-2021">6th January 2021<a data-clipboard-text="http://localhost:2010/additional/maintlog/#6th-january-2021" class="gdoc-page__anchor gdoc-page__anchor--right clip" aria-label="Anchor 6th January 2021" href="#6th-january-2021"><svg class="icon link"><use xlink:href="#link"></use></svg></a></h2></div>
<p>hk-hkg1 is now open for IPv4 peering; see the <a href="https://dn42.burble.com/network/nodes/#dn42-hk-hgk1">node information</a> for details.</p>
<p>IPv6 connectivity is expected ~February.</p>
<div class="gdoc-page__anchorwrap"><h2 id="4th-january-2021">4th January 2021<a data-clipboard-text="http://localhost:2010/additional/maintlog/#4th-january-2021" class="gdoc-page__anchor gdoc-page__anchor--right clip" aria-label="Anchor 4th January 2021" href="#4th-january-2021"><svg class="icon link"><use xlink:href="#link"></use></svg></a></h2></div>
<p>Happy New Year DN42.</p>
<div class="gdoc-page__anchorwrap"><h4 id="new-website">New Website<a data-clipboard-text="http://localhost:2010/additional/maintlog/#new-website" class="gdoc-page__anchor gdoc-page__anchor--right clip" aria-label="Anchor New Website" href="#new-website"><svg class="icon link"><use xlink:href="#link"></use></svg></a></h4></div>
<p>The new year brings a new website for burble.dn42 built using <a href="https://gohugo.io/">Hugo</a> and statically
delivered from each core node for speed. As always, the source for the website is available in the
<a href="https://git.burble.dn42/burble.dn42/www">gitea repo</a>.</p>
<div class="gdoc-page__anchorwrap"><h4 id="anycast-mtu">Anycast MTU<a data-clipboard-text="http://localhost:2010/additional/maintlog/#anycast-mtu" class="gdoc-page__anchor gdoc-page__anchor--right clip" aria-label="Anchor Anycast MTU" href="#anycast-mtu"><svg class="icon link"><use xlink:href="#link"></use></svg></a></h4></div>
<p>The MTU for anycast services has been reduced to 1280 after a problem was seen with IPv6 path MTU discovery.</p>
<p>The problem was due to an asymmetric path, where a request to the wiki went to one node but the return
path was via a different node. The other node also hosted a wiki instance, which meant that pmtud ICMP
messages on the return path were being picked up by the wrong node. To fix this, the MTU has been clamped
to the minimum allowable size of 1280.</p>
<p>Interestingly, Cloudflare also recognised the same type of issue and wrote up what they did in their <a href="https://blog.cloudflare.com/increasing-ipv6-mtu/">blog</a>.</p>
<p>The following services were impacted by the changes.</p>
<ul>
<li>DNS Services</li>
<li>NGINX Reverse Proxy (and therefore also all websites, including the Wiki mirrors)</li>
<li>WHOIS Service</li>
</ul>
<div class="gdoc-page__anchorwrap"><h4 id="new-nodes">New Nodes<a data-clipboard-text="http://localhost:2010/additional/maintlog/#new-nodes" class="gdoc-page__anchor gdoc-page__anchor--right clip" aria-label="Anchor New Nodes" href="#new-nodes"><svg class="icon link"><use xlink:href="#link"></use></svg></a></h4></div>
<p>es-mad1 in Madrid, Spain has already been delivered and is now open for peerings.</p>
<p>The new node in Hong Kong, hk-hkg1 has also been delivered and I&rsquo;m now just waiting for IPv6 to be available
before it too will also be ready for peering.</p>
<hr>
<div class="gdoc-page__anchorwrap"><h4 id="historical-changes-from-previous-years">Historical changes from previous years<a data-clipboard-text="http://localhost:2010/additional/maintlog/#historical-changes-from-previous-years" class="gdoc-page__anchor gdoc-page__anchor--right clip" aria-label="Anchor Historical changes from previous years" href="#historical-changes-from-previous-years"><svg class="icon link"><use xlink:href="#link"></use></svg></a></h4></div>
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<a href="/additional/maintlog/2020/" class="gdoc-toc__entry">2020</a>
</span>
</li>
<li>
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<a href="/additional/maintlog/2019/" class="gdoc-toc__entry">2019</a>
</span>
</li>
<li>
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<a href="/additional/maintlog/2018/" class="gdoc-toc__entry">2018</a>
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