talkingpumpkin

joined 1 year ago
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Weird (to me) networking issue - can you help? in c/[email protected]
[–] [email protected] 1 points 6 hours ago

I don't think I quite explained the situation well enough: my server only has 1 ethernet port (same as my PC), otherwise I wouldn't have bothered with vlans (well, I would still have bothered, since my house still only has one "backbone" cable running through it, but I would have configured it on the switches only).

Anyway... a few of the things you say/imply go against my understanding of networking, so one of us would better go back RTFM as you suggest :) (just kidding - most probably I just don't understand what you mean)

Weird (to me) networking issue - can you help? in c/[email protected]
[–] [email protected] 1 points 7 hours ago (1 children)

Thanks! Forwarding is disabled. I don't want the server to steal the router's job :)

Weird (to me) networking issue - can you help? in c/[email protected]
[–] [email protected] 2 points 7 hours ago* (last edited 6 hours ago) (1 children)

So the request goes trough but the replies are discarded ? That could actually be it!

I think there was an option to allow that... I'll search it and give it a try. Thanks!

Weird (to me) networking issue - can you help? in c/[email protected]
[–] [email protected] 2 points 7 hours ago

I tried dropping the default routes (one at a time) and it doesn't make a difference, which isn't (I think) surprising as all traffic is local as far as the server in scenario 1 is concerned. Also IIUC only the default gateway with the lowest metric actually counts.

23
Weird (to me) networking issue - can you help? (lemmy.world)
 

I have two subnets and am experiencing some pretty weird (to me) behaviour - could you help me understand what's going on?

Scenario 1

PC:                        192.168.11.101/24
Server: 192.168.10.102/24, 192.168.11.102/24

From my PC I can connect to .11.102, but not to .10.102:

ping -c 10 192.168.11.102 # works fine
ping -c 10 192.168.10.102 # 100% packet loss

Scenario 2

Now, if I disable .11.102 on the server (ip link set <dev> down) so that it only has an ip on the .10 subnet, the previously failing ping works fine.

PC:                        192.168.11.101/24
Server: 192.168.10.102/24

From my PC:

ping -c 10 192.168.10.102 # now works fine

This is baffling to me... any idea why it might be?

Here's some additional information:

  • The two subnets are on different vlans (.10/24 is untagged and .11/24 is tagged 11).

  • The PC and Server are connected to the same managed switch, which however does nothing "strange" (it just leaves tags as they are on all ports).

  • The router is connected to the aformentioned switch and set to forward packets between the two subnets (I'm pretty sure how I've configured it so, plus IIUC the second scenario ping wouldn't work without forwarding).

  • The router also has the same vlan setup, and I can ping both .10.1 and .11.1 with no issue in both scenarios 1 and 2.

  • In case it may matter, machine 1 has the following routes, setup by networkmanager from dhcp:

default via 192.168.11.1 dev eth1 proto dhcp              src 192.168.11.101 metric 410
192.168.11.0/24          dev eth1 proto kernel scope link src 192.168.11.101 metric 410
  • In case it may matter, Machine 2 uses systemd-networkd and the routes generated from DHCP are slightly different (after dropping the .11.102 address for scenario 2, of course the relevant routes disappear):
default via 192.168.10.1 dev eth0 proto dhcp              src 192.168.10.102 metric 100
192.168.10.0/24          dev eth0 proto kernel scope link src 192.168.10.102 metric 100
192.168.10.1             dev eth0 proto dhcp   scope link src 192.168.10.102 metric 100
default via 192.168.11.1 dev eth1 proto dhcp              src 192.168.11.102 metric 101
192.168.11.0/24          dev eth1 proto kernel scope link src 192.168.11.102 metric 101
192.168.11.1             dev eth1 proto dhcp   scope link src 192.168.11.102 metric 101
55
Simplest tool to maintain local mirrors of git repos? (lemmy.world)
 

I want to have a local mirror/proxy for some repos I'm using.

The idea is having something I can point my reads to so that I'm free to migrate my upstream repositories whenever I want and also so that my stuff doesn't stop working if some of the jankiest third-party repos I use disappears.

I know the various forjego/gitea/gitlab/... (well, at least some of them - I didn't check the specifics) have pull mirroring, but I'm looking for something simpler... ideally something with a single config file where I list what to mirror and how often to update and which then allows anonymous read access over the network.

Does anything come to mind?

Router died - Replacement/solution recommendations in c/[email protected]
[–] [email protected] 6 points 1 week ago (1 children)

If going the route of a backup solution, is it feasible to install OpenWRT on all of my devices, with the expectation that I can do some sort of automated backups of all settings and configurations, and restore in case of a router dying?

My two cents: use a "full" computer as your router (with either something like OPNsense or any "regular" linux distro if you don't need the GUI) and OpenWRT on your access points.

Unless you use the GUI and backup/restore the configuration (as you would with proprietary firmwares), OpenWRT is frankly a pain to configure and deploy. At the moment I'm building custom images for all my devices, but (next time™) I'm gonna ditch all that, get an x86 router and just manually manage OpenWRT on my wifi APs (I only have two and they both have the same relatively straightforward config).

It’s a pain that I know can be solved with buying dedicated access points (…right?)

Routers and access points are just computers with network interfaces (there may be level-2-only APs, but honestly I've never heard of any)... most probably your issue is that the firmware of your "routers as access points" doesn't want to be configured as a dumb AP.

Using the term ‘artificial intelligence’ in product descriptions reduces purchase intentions in c/[email protected]
[–] [email protected] 4 points 2 weeks ago (1 children)

Does it still? Looks like the bubble is about to explode

Immutable backup for important data in c/[email protected]
[–] [email protected] 2 points 3 weeks ago (1 children)

How much data are we talking about?

A free mega.nz account should be fine for everything except family fotos and legally obtained music/movies.

8 versions of UUID and when to use them in c/[email protected]
Benefits of a join table vs. array to express relations? (outside of SQL) in c/[email protected]
[–] [email protected] 2 points 3 months ago (1 children)

Not sure I'm getting the issue here (what does "join table" mean in the scope of JSON/XML?), but... doesn't how you lay out your data in JSON/XML file have zero impact in your application's queries? You won't be querying the JSON - you'll be loading data from it into memory and query the memory.

Has anyone ever used Jaspersoft? in c/[email protected]
[–] [email protected] 3 points 3 months ago (1 children)

I last used it a good while ago (like, 10yrs?), so you'll have to verify how what I am about to say applies to current versions (it probably does).

Jasper is an old-school, enterprisey tool similar to Crystal Reports that attempts to give you a WYSIWYG editor for building your reports.

All in all, I'd say that it might be good if you have a reporting department full of people that only do reports and you don't want to train as programmers. If the ones doing the reports are gonna be actual programmers, they'll be much better off generating html/latex/whatever and converting that to pdf.

How do you handle family requests that you disagree with? in c/[email protected]
[–] [email protected] 7 points 3 months ago

I'd say a good middle ground could be making that stuff only visible from your mom's user (or even setting up a completely separate server)?

It depends on what YOU want to do, really... personally, I would be ok hosting religious nonsense if asked, as long as it's not generally available in kids' accounts and stuff (also, porn), but I would come clean and outright refuse if it was neonazi,racist and/or conspiracy stuff. It depends on where you decide to draw the line.

BTW: there's also the passive/aggressive, cowardly option of sayng "I'll rip them when I have time" and then sequester all the DVDs and only ever find the time to rip the ones you don't mind

Syncthing ... where are the users? in c/[email protected]
[–] [email protected] 5 points 3 months ago (1 children)

man this is getting real popular (kinda like "why not both?" a while ago)

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