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78 discussions

by DuckCorp Admin Team

Quack, Toushirou is unfortunately loosing one of its network link and we need to reorganize the whole network configuration. It's a little bit touchy, especially with the remote storage decryption procedure so we may need to do a trip at the datacenter to finish the setup. We should have warned you a little bit earlier (even if this bad news came not long ago). We're working on it this very day, so expect some disturbances and potentially a bit of downtime (most web services). Regards. \_o< -- Marc Dequènes (Duck)

1 month

Quack for the Year

by DuckCorp Admin Team

Quack, Happy New year! (slightly late, sorry) We hope you're still safe and doing well. === Memory Problems on Orfeo === Orfeo is old and lacks memory but only recently did we hit problems. During the last few weeks we had to restart failed services and we started investigating. Nothing major changed on our side but the antivirus's update method had changed to be more efficient at the cost of more memory usage (clamav's ConcurrentDatabaseReload) and we though that was it. Unfortunately something seems to be leaking memory, we could not find the source and decided to reboot. Orfeo took a very long time to come back (03:10-08:40 CET) and we though it lost. Everything's working fine again but we'll be monitoring the situation. === Misc News from end of 2021 === - LDAP improvements: the deployment was totally reworked to be simpler, with better security rules and now all three servers are replicating each other (n-way sync) which means there is no single point of failure anymore. - all machines were upgraded to Debian Bullseye successfully. - Matrix experimentation is going on well: the web interface improved and communities were replaced by spaces; ask for an invitation on IRC if you wish to join the DuckCorp space. - the webmail was upgraded bringing dark mode (to preserve your eyes) and other improvements/fixes. - we use certbot to generate Let's Encrypt certificates and it's missing an [important feature](https://github.com/certbot/certbot/pull/7244). so far we used the patch in this ticket but it does not seem it will be included. Until this is resolved one way or another we're now using a simpler workaround patch to ease the maintenance and we're also evaluating using another tool (acme.sh for e.g.). Hugs. \\_o< -- Marc Dequènes (Duck)

3 months

Teru-teru-bozu, teru bozu, Do make tomorrow a sunny day, Like the sky in a dream sometime…

by DuckCorp Admin Team

* song by Kyoson Asahara and Shinpei Nakayama (https://en.wikipedia.org/wiki/Teru_teru_b%C5%8Dzu) Quack, We hope you're safe and doing well. === Improved Mailing-Lists === We upgraded our mailing-lists to Mailman 3. It's not just about the shiny UI, the underlying mail routing daemon is better in many way. We plan to add LDAP authentication but integration requires extra work since it's not available out of the box. === New System for Users' DNS Primary Zones (aka DNS4Tenants) === Banya, our GPG Mail Command gateway, is soon going to retire. This was inspired by Debian tools and made to be very secure, but unfortunately sending a properly GPG-signed/encrypted mail with most MUAs is still not that trivial, making zone updates more painful that it should be. The script doing the mail handling and DNS update was also far too brittle and maintenance over time proved problematic. We're replacing the current system with something easier to use without compromising security: tenants can now edit their zones in a git repository of their choice and under 5 minutes a script should pick the changes, check the zone validity, send errors to the user, and publish the result if all is fine. It might not sounds like it but the new script is by far simpler and smaller. The git repository will be fetched using HTTPS and can be hosted anywhere (including DC). If you wish to keep your zone hidden then it needs to be accessible using the script's SSH key; most forges allow that. At DC this is also possible but we're working on a better solution. DC and MP zones are now managed using the new system and available in our openinfra repo. We'll contact users to handle the migration. === Web Key Directory Service === If you have an email in @dc.o or @mp.o you can now make your GPG key available using this protocol if you use them in one of your UIDs. It is an alternate way of fetching keys: the owner of the domain certifies it is a valid email address and the key association. It is supported by more and more MUAs, and after all the security problems discovered in Key Servers' implementations, it should both improve security and usability. This comes with an automated way to setup and update the association, so you start using it right away. We can also provide this service for hosted domains. And some documentation: https://users.duckcorp.org/index.php/Services/WKD === Misc news === * Matrix: * the server is working well; we still have made no decision about IRC mapping. * Documentation is now available: https://users.duckcorp.org/index.php/Services/Matrix * IRC: thanks to Mikachu's suggestion we now have a DNSBL configured and it seems to be working well against the recent SPAM; it is also used for antispam (weighted) * DNSSEC: work has been done both upstream and on our side to fix various problems. Full automation is not yet complete but making progress. * Backup: Pilou added an extra disk for the backup on Nicecity. We have a basic backup but the target system is still WIP Hugs. \\_o< -- Marc Dequènes (Duck)

11 months, 3 weeks

Quack for the Year

by DuckCorp Admin Team

Quack, We wish you a better year (a bit late, sorry). Many hugs to you. === Toushirou's Move === We need to move Toushirou since Nerim is closing the room where it is currently housed. Pilou is kindly handling the physical part of it since I cannot do that remotly from Japan. We'll send more detailed info about the disturbance and timing. === IRC Upgrade === We recently upgraded our IRC servers. This version of the software reached end of upstream support and that will make switching to the soon to come new Debian release easier anyway. The documentation was updated accordingly: https://users.duckcorp.org/index.php/Services/IRC Highlights: - problems with older IRC clients (https://docs.inspircd.org/faq/#why-does-my-client-not-show-mode-changesoppe…); on Thorfinn IRSSI was fine but weechat was upgraded to a backport (I tried using the /upgrade command but it crashed so avoiding a restart is probably not possible) - SASL/EXTERNAL method is now available, practical with certfp (recommended) to get security and autologin (TLS required); read the doc on the wiki for more info - STS is supported to suggest IRC clients to switch to TLS === IRC Policy Changes To increase security, privacy and ease fighting disturbing people that do not forget to visit us every year we are changing some requirements. MilkyPond will become a TLS-only network starting early March. Nowadays IRC clients on all OSes/devices all support TLS and it's just one single checkbox to check so it should not be difficult for non technical people to switch. The available port list will not change, only insecure connections won't work anymore. Registering an account is not compulsory but recommended too; channel owners might require it though. Using certfp and SASL/EXTERNAL it is very easy to automagically login to your account while connecting. It's the same recommendation you can find on freenode and other major networks and it's not very difficult to setup (see on the wiki). #DuckCorp is our admin channels. We ought to always be able to discuss peacefully even when the IRC network is being spammed, so we are going to require an account to join this channel at the same date we make TLS compulsory. This does not affect other channels. === The world of Matrix === We wanted to experiment running a Matrix server to provide an alternative method of communication. We still use IRC but not everyone find it practical, XMPP is available too but lost traction, several of us use Signal but even if the clients are opensource the server is not and it's totally centralized, so we're now providing a new method for those who wish to try. It works fine so far but some features are still missing. The wiki is not yet updated but if you wish to try you can connect with your LDAP uid/password on the "milkypond.org" domain (no need to register with us, your Matrix account is created at first login) with: - the MilkyPond Web UI: https://matrixonweb.milkypond.org/ - Quaternion on a GNU/Linux desktop - Element on Android (available on F-Droid) (other clients exist but they were not tested) We also experimented with a bridge to join communication between the #MilkyPond and #DuckCorp IRC channels and their Matrix counterpart, sorry for the noise, but that did not work well because of several limitations and the fact end-to-end encryption was enabled on Matrix thus preventing the discussions to flow towards IRC which does not support such encryption. The goal was to prevent splitting the community but maybe that's not such a good idea. Ideas welcome. If you lack a service that would make this time less painful, please tell us. Be safe. \_o< -- Marc Dequènes (Duck)

1 year, 3 months

Small updates and Big Reboot planned

by DuckCorp Admin Team

Quack, Hope you are well. Despite this difficult time we've done some work but the announcement was delayed. === Reboot === Well, it's high time we finally do it. There was some concerns with GRUB recently, so it was delayed again but it's really needed. I'll try to do it next week and will be announcing status on IRC. The whole infra is concerned so I'll roll things up one by one and will inform of the outages along with the announcement. If all goes well that will be brief. === Webmail and GPG === If you're using the webmail to send encrypted mails, we've been upgrading the software and signing (and signature verification) is now working fine too. === IRC === We had a bunch of spammers dumping nasty things earlier this year. We loaded new plugins in the IRC software to ease filtering them out but it caused some disruption, sorry for that. IRC on Web was upgraded and the UI had several problems fixed and some missing functions added. === Security === Public-facing services now all use Let's Encrypt, there is no need to import DC's custom CA anymore. We are working to add DANE support to more services (currently only SMTP) as a secondary method to validate you're going to the right machine. === Misc === In Stuffcloud Talk the TURN/STUN server was not working well, is ti now fixed. The MineTest server was unused for some time and was removed. Be safe. \_o< -- Marc Dequènes (Duck)

1 year, 9 months

Autumn Updates

by DuckCorp Admin Team

Quack, === Improved Webmail === As you must have seen the webmail was upgraded and much more modern theme which can now be used on a mobile phone. The old theme is still available and it can be changed in your settings if your preferred it. There are many little improvements and fixes which are not immediately visible but should improve our daily life. The support for Mailvelope, to be able to encrypt/sign mails from your browser, without disclosing your key to the server, is supposed to be improved but I was not able to enjoy it yet. I will come back to you when I have more time to test but feedback is welcome too. To secure your login TOTP is also available. After the upgrade there is a small problem though: the QR code does not show up in the new theme, please switch back temporarily to the Larry theme in your settings. More details on how to use it in the documentation: https://users.duckcorp.org/index.php/Services/Mail#Using_a_Web_Interface === Web Security === We are adding extra security features to our hosted web hosts and especially for our services we are limiting the content and features a website can use (using various headers and especially CSP). On of the consequence is the webmail will not accept unsecure links. I just discovered it should be possible to upgrade the link to a secure version on the fly, which should solve most usability problems; I will work on this soon. If it is blocked, then it is unsafe and your browser logs should say so. If you want to protect your personal website, please contact us; safe settings are applied everywhere but only fully-managed services will be upgraded automagically, as knowledge of the site's content is needed to protect without breaking. === Stuffcloud Talk === Now that Toushirou has a new body, and also some software upgrades, this video chat application is working fine so far, enjoy. === DNS Security === Our main zones are already secured (DNSSEC) but we changed the underlying software (OpenDNSSEC to Bind inline-signing). This simplifies a lot of things even if it is not yet perfect. With these changes we are able to secure dynamic zones easily and the DDNS zone is now safe. It also makes things possible on the PKI side (see below), === PKI === Some time ago we began use Let's Encrypt to generate HTTPS certificate that would be trusted by all major browsers. This is working fine and the automation is great. Nevertheless we still kept our non-web services under the umbrella of our custom DuckCorp CA. There are initiatives to secure the web but they all rely on the infamous self-appointed CAs. Despite this, bringing services and user software to use secure connections is important, so we decided to use Let's Encrypt for more services. Currently this only affects SMTP servers but more will follow. This should improve the trust the big providers/corporation on the Internet give to our server (like our mails landing on your recipient's SPAM box for no good reason). The work done on the DNS allows us to deploy Let's Encrypt certificates for non-web services (using the DNS challenge). Using an external CA is not necessarily giving away the extra security we had with our custom CA. There is a method (DANE) to publish our certificates for each service via the DNS on a secure zone, which we do have. We were already publishing them for non-web services but it had to be reimplemented to work with Let's Encrypt. We should then have the best of both worlds. === Mail Security === We've reinforced the security level of various services (TLS settings…) and especially the SMTP and IMAP part. For SMTP we are now using a set of servers protected by DNSSEC with published certificates (DANE). We also advertise a policy to enforce secure connections (MTA-SAS, the HSTS of the mail). === AntiSPAM === Previously we were quite unforgiving with badly configured servers sending badly formatted or unresolvable introduction (HELO), but a lot of providers have very bad practices and this caused some difficulties to use certain services. We are now using Rspamd filters which are weighting these problems among other things to discover if a mail is really a SPAM and we have relaxed the previous SMTP rules. === IPv6 broker === We lost our dedicated IP block quite some time ago and there was an expensive way to get another. As funny as this service was, not so many people cared about IPv6 and now that most Internet connections have it included it has been a very long time anyone asked for it. This was de facto over but now it's official. These are quite important changes to our infra. If you encounter any problem, please let us know. And enjoy the autumn leaf viewing too! :-) \\_o< -- Marc Dequènes (Duck)

2 years, 7 months

Summer upgrades

by DuckCorp Admin Team

Quack, === A Word on NiceCity === So the machine is back online and works fine. Supervision is working too though it still need some tweaking. The work to rebuild the backup is in the todolist now. === System Upgrades === We've been preparing upgrades to Debian Buster and the work has already started. Nicecity was rebuilt on Buster directly. Elwing recently migrated too, so we were able to adapt our deployment rules. Not everything is ready for all machines to migrate yet but we're going to start migrating machines starting from now. Because of kernel changes and also some network settings that needs to be adapted, this means at least one reboot, maybe more. We'll try to minimize downtime but expect some short disruptions. You can follow the steps on IRC. \\_o< -- Marc Dequènes (Duck)

2 years, 9 months

Spring renewal

by DuckCorp Admin Team

Quack, Let's begin with the bad news. === Credentials and potential LDAP info leak === Our MediaWiki instances configuration, as all the rules of our infra are opensource. Unfortunately certain secrets were not protected as they should have been: * database credentials: MariaDB is not available from the outside, so it's not a big deal * contact emails: we try to hide all emails to avoid SPAM; webmaster, HappyPeng and myself are affected * wiki secret key: used to generate entropy when a proper source is not available, which is not our case * LDAP service account: this is a nasty part as most user information might be accessed; we do not keep more than needed to run the service but realnames and email addresses could have been listed; all credentials are safe and no modification is possible though We did not find any suspicious activities in the logs, but that's difficult to assess. So obviously before sending this email we remedied the situation. We also plan to limit how this account can be used even more. Deeply sorry for this mistake :-/. === Progress on the new hardware === Nicecity's hardware gave some difficulties and a new disk was needed. It is now almost fully deployed with Ansible, so we should soon be able to use it in production. Toushirou-NG's deployment is done and we're regularly syncing it. We're keeping it up-to-date with current production and are preparing the migration steps. === StuffCloud login Security === Two factor authentication (2FA) using TOTP and U2F has been activated and tested for some time now. We did not have any problem with both method, so we strongly suggest you try it. The documentation has been updated to give more information on how to set this up: https://users.duckcorp.org/index.php/Services/StuffCloud === Wiki Migration === The shared wiki (wiki.duckcorp.org), running on MoinMoin, is going to migrate soon to MediaWiki in order to avoid having to maintain two systems. === Mail and Sync User === Some users prefer to sync emails on their machine, which can be handy if you travel, wish to access them offline and later have all your modifications propagated. It can also be useful as a backup mechanism. On problem with most tools is their inability to "move" mails (instead of "copy"), which prevent then to use the 'Junk' folder A simple solution is now available, described here: https://users.duckcorp.org/index.php/Services/Mail#Retraining_for_feature-l… === Web and PHP === We were already investigating using PHP FPM instead of the embedded Apache mod_php. This is more secure and flexible as you can run the wanted number of workers using a dedicated UNIX user, thus avoiding one instance to read files from the others. It happens that we activated HTTP2 in the past and some related fix unfortunately required to change the Apache MPM, which is not possible with mod_php, or to abandon HTTP2, so this changed priorities a bit. The full migration has just been done for all PHP-enabled vhosts, so tell us if you encounter any problem. Hope you enjoyed the Hanami! \\_o< -- Marc Dequènes (Duck)

3 years

Happy New Year!

by Marc Dequènes (duck)

Quack, Many hugs for this new year! Pilou and I are coming to FOSDEM (and some side-events), so if you're around do not be shy and say quack. === Plans for the Future === No crazy plans for this new year yet. We're focused on replacing the aging hardware and finishing automating our deployments to simplify our job. There's a few ideas when we get extra power on the new hardware, but that's for another post. Nicecity is small and could not keep up with the load of the Monitoring system, so Pilou kindly is upgraded her. We should transplant her consciousness soon and restart both monitoring and backup on the new hardware. There is no direct user impact but be sure to backup your critical data on your own just in case. The work on Toushirou-NG is ongoing, this is coupled with the effort to Ansibilize our infra which made quite a lot of progress. So we're basically able to reinstall the host fully with Ansible modulo one or two small glitches. Data are being synced with the current host too. Before proceeding to the replacement we need to check that all services work fine, this is WIP. DNSSEC (signed DNS zones) is a very nice security feature but unfortunately managing the keys and their replacement over time is quite a hassle to say the least. We're currently using OpenDNSSEC and it works but the setup is a tad complicated. the DNS server (Bind9) has made quite some progress on this front. We're now using the Debian backports to take advantages of some new features and we're evaluating switching to using Bind9 tooling directly. === Mail === We did some work around the mail filtering system (SIEVE): - activated spamtest: if you do not use the provided include script to move SPAM into the Junk box becaue you need more customization, then you should be interested in this extension. Instead of parsing the headers yourself, which could break if we change the system, tune the sensitivity… this extension provides an interface with a normalized score directly - activated vacation-seconds: allows more granularity for the vacation settings - on the webmail we replaced the unmaintained Roundcube 'sieverules' plugin by 'managesieve'; this is prepare for the future Debian version with an improved Roundcube and SIEVE plugin. Currently they are equally incomplete and buggy, so it should not change anything for you. - we recently switched from the deprecated dovecot-antispam Dovecot extension to IMAPSIEVE, which does a similar job but cleaner and more flexible by far. It currently implements the same exact behavior, so no user change. In the future Debian version the old extension would not work, so better be prepared. The documentation was updated accordingly: https://users.duckcorp.org/index.php/Services/Mail We also activated the IMAP metadata extension which is used by some mail clients to store server and folder custom information. It "might" be useful, but it's cheap anyway so why not enable it. === Cleanup === We're continuing to reevaluate our services to focus on the important things and to be able to gather resources for new projects. The webstats, fetchmail and feed2imap services were unused, so they were removed. \\_o< -- Marc Dequènes

3 years, 4 months

Mail Revamping #2

by DuckCorp Admin Team

Quack, === Mail System Redundancy === Our old antispam system has been shutdown and Toushirou has been promoted to full MX1/MDA/MAA. This means we now have two machine receiving mails, filtering spam and synchronizing with each-other (SIEVE rules and antispam learning are synced too). I just updated the DNS records so that {smtp,mail,imap,pop,sieve}.duckcorp.org now balance between the two. So if one machine is down, you should be able to retry to reach your mail on the second machine. The webmail is currently not redundant but we're working on it. The mailing-lists will stay on Orfeo as there is currently no way to make this service redundant. === Note about the Antispam === We had some user questions so I wanted to clarify a few things. The new learning system is very similar to the previous one. The big change is: from now on all learning is shared between users. This means you benefits from SPAM caught by other users but it makes the learning less personalized. It is difficult to evaluate what's best but per-user learning made the system very complex and was very resource intensive so we decided to try the shared method. Many well known big companies also use shared training, so that new users don't start with a blank system which would need weeks or months to be well trained and it seems to work quite well. Another important point is how to train the system. We simplified the old system and the new one does not have a web interface for users anyway. The 'Junk' folder (your mail client may translate the name) is used to collect discovered SPAM. If you move mails into it you inform the system it is a spam it should have caught. If you move a mail out of it then you inform the system it made a mistake and this is not a spam. To get detected SPAM automatically put into the 'Junk' folder there is a default SIEVE filter. But if you added your own filters, then you need to include the default rule into your configuration as explained here: https://users.duckcorp.org/index.php/Services/Mail This was done to allow users to override the default rule if they wanted another workflow. We're wondering if this has any real application and thinking about making this rule compulsory (processed before any user filters). Your input on this matter is welcome. \\_o< -- Marc Dequènes (Duck)

3 years, 10 months

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