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Joined 1 year ago
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Cake day: June 17th, 2023

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  • Concerning linux, yesterday I was watching this video on computerphile on the crowdstrike incident. https://www.youtube.com/watch?v=rlaNMJeA1EA (*)

    What is interesting is the comment made in the video on how chromebooks do software upgrades with dual “OS” disk-partitions and the ability to rollback to the previous OS-partition.

    Question: is something like this also possible on one of the major linux distros? (debian, ubuntu, rocky, …) What would be the procedure to do this kind of “dual partition” system-upgrade?

    (*) a great video that explained some of the technical details in a very clear way, including some very interesting ‘lessons learned’ and "what if"s If you ever need to explain crowdstrike to your manager, this video is a good start.





  • Well, the issue here is that your backup may be physically in a different location (which you can ask to host your S3 backup storage in a different datacenter then the VMs), if the servers themselfs on which the service (VMs or S3) is hosted is managed by the same technical entity, then a ransomware attack on that company can affect both services.

    So, get S3 storage for your backups from a completely different company?

    I just wonder to what degree this will impact the bandwidth-usage of your VM if -say- you do a complete backup of your every day to a host that will be comsidered as “of-premises”




  • For me, the first goal is to simply understand the setup. I now have been able to create a setup with two frontend jvb-instances and one backend. In the end, the architecture setup of a jitsi-server is quite nicely explained, and -by delving a little bit into the startup scripts of the docker-based jitsi setup, you do get some idea of how things fit together.

    From a practicle point of view, I think I’ll go for the basic setup (1 backend, 2 frontends) natively on two servers, and -if the backend server would go down- just have a dockerised backup-setup ready to go if it would be needed.

    Thanks!





  • Hi,

    Good idea!

    And once you have you domainname, you can do the following:

    • set up a reverse reverse proxy (apache, nginx) in front of nextcloud
    • in the configuration of apache/bginx use virtual hosts.
    • make sure that the default virtualhost (in apache, that is the the one that does not have “ServerName”) first in the configuration. Point that to a local website with just an empty directory
    • then, AFTER the default virtual host, add the reverse-proxy configuration of your nextcloud instance.

    What this does, is that if somebody addresses your website with a URL that does not contain the exact hostname of your nextcloud, the webquery will go to the empty website and simply return a 404. A hacker who does a webrequest to “https://your-ip-address/login” will just get a “404 not found” and not reach your nextcloud instance.

    This keeps people who just scan the internet for vulnerable systems and try out all kind of URLs to try to get in out of your nextcloud.

    Of course, this only works if you keep the full hostname of your instance to yourself and do not post it somewhere (including social media, mailing-lists, …)

    Good luck with your nextcloud server



  • Hi,

    What is the reason you do not want a domain? it is not that DNS-domains are that expensive these days. The cheapest option I found is .ovh (which is one of the major cloud-providers in France), which is 3 euro / year (+VAT). You can then put as much hosts or subdomains under it, and it supports dynamic IP.

    Agreed, .ovh is not the most “professional” looking domain, but it depends on what you want to do. If your goal is simply to have something for yourself / family / friends, then this is good enough.

    BTW. Having your own domain for a nextcloud instance has additional advances: you can get a real https/tls certificate from letsencrypt, and -if you put a reverse proxy in front of your NC- it shields you from people who just scan the complete IP-space of the internet but who do not know your domain.


  • Hi, I have it running as of today. apache reverse-proxy native on the server and “stable-8922” in docker.

    I have been wondering if it makes sense to move the jvb from docker to the server. I guess that is the part of the system that pulls most of the traffic. I don’t know if this make any real difference for performance or not.

    Anycase. All, thanks again for the help. Appriciate it. :-)

    Kr.


  • Hi Hugh,

    To be clear. This is not about the tags itself. It’s about the system of tag-following and how it is implemented on the fediverse. It is due to how the fediverse (acitivtypub) works and how (or why) messages are routed from one instance to another.

    There is a major different on how following (people) and how tag-following work. (perhaps the simularity in name is not such a good choice)

    The basic idea of following (people) is this: Consider that you are me are on a different instances and I want to follow you; so I hit the “follow” buttom.

    What actually happens is this:

    • My instance sents an activitypub message to your instance. That message contains the information about me and you … and that way, your instance is aware that I (on my instance) want to follow you (on your instance)
    • when you then write / boost / … a post, your instance will then forward that post to my instance (based on the information received in step 1), which will then put it in my personal inbox stream.

    So far, so good. I am happy to read your (very interesting) posts, and you are happy as your messages gets forwarded to a lot of people who think you are an awsome guy!

    Tag-following however is based on a very different system.

    • you do a tag-follow request. What this does is that this tells your local instance that you are interested in all messages that contain the tag (say) “#caterday”

    • What this will do is this: If (in any way) a message enters your instance and that message contains the tag “caterday”, your instance will drop a copy of that message in your inbox steam, … which results in another post with a nice cat-image in your personal stream. Yeah!

    • What this does NOT do: Unlike the “following-people” system, tag-following is purely local thing. (“local” means “on your own instance”). So, what does NOT happen is that that your instance has started sending messages to all instances out there on the fedivere saying “hey … here is somebody who is interested in cats … please send me all these posts”.

    The main point here is that tag-following is only local between you and your own instance. Not more than then.

    In essence, … the important thing here is the first part of my message above: “If (in any way) a message enters your instance, and that message containts the tag …”

    So, then the question is: “what are the mechanisms so that a post enters an instance? (and -hence- be subject to tag-following)” This could happen in two ways:

    • because somebody local on the instance writes a post.
    • because somebody on a remote instance writes a post AND somebody on the local instances follows that person. As explained above, that message will get forwared by the remote host to your local instance.

    So, to put things together, Consider we are on different instances, I write a post with the #caterday tag, … but neither you or anybody else on your instance follows me, … the video of my cat attacking a ball of cotton will NOT reach you. (bad luck for you … you should have followed me :-p )

    Does this mean that tag-following is useless? No, not at all.

    When does tag-following work very well? To give a practicle example. I have an account on mastodon.radio (an specialised instance for amateur-radio) and overthere I do tag-following of #electronics.

    That works very well because

    • there are a lot of ham-radio people doing electronics
    • there are also lot of people on other instances who are into building electronics … but there is a very big chance that they are followed by at least one person on mastodon.radio. So their posts get forwarded to mastodon,radio … which will then also appear in my inbox due to tag-following. This really works very well, and provides me with a good stream of messages with a good signal-to-noise ratio.

    When does tag-following not work well?

    • if you have a personal instance as I also do.
    • if you are on a smaller instance and you have a less common interest. So, if you happen to be the only metalhead on (say) a 50 member instance that serves your local city, there is a very little chance that a tag-follow for your favorite all-female Japanese metal band will produce much content.

    What can you do if you are in the 2nd senario?

    If there exists an instance dedicated to your interest (that still accepts people)

    • get an account on that instance and use a multi-account app like fedilab

    • use an app like fedilab to remote-read the public feed of that instance, find interesting people, follow them with your current fediverse account you already have, and build up your list of interesting people to follow that way.

    • switch to lemmy or kbin :-) (as lemmy and kbin are by nature more community-based)

    • follow the lemmy/kbin community from within your mastodon/fediverse account.

    If you happen to be interested in something very specific and the other nerds are all spread out over a zillion different fediverse instances out there:

    A nice exercise to get a good feeling about this is to get both an account on a mid-side instance and set up your own personal instance. The different in how to approach the fediverse become apparent quite fast.

    Hope this helps :-)




  • Hi Kux,

    The problem I see here, is that you then also need to explain why following a remote instance might be interesting, . which means that you need to explain how the fediverse has led to the existance of specialised instances. (which means that you also need explain that the fediverse is more community driven).

    "even though you can be on one instance (as you really like the community overthere, and it the posts have a good signal-over-noise ratio), the ability to follow remote instances does still allow you to follow other instances (read: other communities) … after all … most people do are interested in several things, no? "




  • interesting article.

    I understand the fact that you do not want to make it to.complicated, but there qte soms other things you might try to squeze in:

    • other microblogging software besides mastodon (miskey, pleroma, gotosocial. ) who are also the fediverse I understand that you are mainly addressing people who come from twitter/X. A lot of people equate micro blogging with twitter … and twitter with microblogging. It is interesting to note that micro blogging is just a service, and twitter and mastodon are just two examples (be it the biggest ones). But there is other microblogging software out there! And, due to the fediverse, you are free to use anyone you like.

    You can mention that these othersoftwarei offer other perspectives to the same service. Eg. a service like hubzilla has a more privacy-oriented approach.

    • You mention mastodon pixelfed and Lemmy as the fediverse replacement for X, Instagram and reddit (services people know). You canalsoo mention services like friendica (which has a more FB like interface), or peertube, librecast, (videos and videostreaming) , funkwhale (audio),/ WordPress (for macroblogging) … or less know services that do not have ‘big name’ tech behind it (eg bookwyrm for books, agenda-sharing services, … or even activitypub based chess).

    I understand that listing all of this would be to much. It is however interesting to make people understand that social media is a lot more then ‘the big three names they know’, both in the variety in the types of services social media offers and the choice of software inside each segment)

    Kr.